User manual ROLAND AC90

Owner's Manual Bedienungsanleitung Guide d'utilisation Manuale dell'utente Manual del usuario Manual do proprietário Gebruikershandleiding Thank you, and congratulations on your choice of the Roland AC-90 Acoustic Chorus. 201b Before using this unit, carefully read the sections entitled: · IMPORTANT SAFETY INSTRUCTIONS (page 2) · USING THE UNIT SAFELY (page 3­4) · IMPORTANT NOTES (page 5) These sections provide important information concerning the proper operation of the unit. Additionally, in order to feel assured that you have gained a good grasp of every feature provided by your new unit, Owner's manual should be read in its entirety. The manual should be saved and kept on hand as a convenient reference. 202 Copyright © 2007 ROLAND CORPORATION All rights reserved. No part of this publication may be reproduced in any form without the written permission of ROLAND CORPORATION. WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. INSTRUCTIONS PERTAINING TO A RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS. IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS WARNING - When using electric products, basic precautions should always be followed, including the following: 1. 2. 3. 4. 5. 6. 7. 8. Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with a dry cloth. Do not block any of the ventilation openings. Install in accordance with the manufacturers instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. 11. Only use attachments/accessories specified by the manufacturer. 12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over. 13. Unplug this apparatus during lightning storms or when unused for long periods of time. 14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. 9. For the U.K. IMPORTANT: THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE. BLUE: NEUTRAL BROWN: LIVE As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED. Under no circumstances must either of the above wires be connected to the earth terminal of a three pin plug. 2 USING THE UNIT SAFELY Used for instructions intended to alert the user to the risk of death or severe injury should the unit be used improperly. Used for instructions intended to alert the user to the risk of injury or material damage should the unit be used improperly. * Material damage refers other adverse effects respect to the home furnishings, as well animals or pets. to damage or caused with and all its to domestic The symbol alerts the user to important instructions or warnings.The specific meaning of the symbol is determined by the design contained within the triangle. In the case of the symbol at left, it is used for general cautions, warnings, or alerts to danger. The symbol alerts the user to items that must never be carried out (are forbidden). The specific thing that must not be done is indicated by the design contained within the circle. In the case of the symbol at left, it means that the unit must never be disassembled. The symbol alerts the user to things that must be carried out. The specific thing that must be done is indicated by the design contained within the circle. In the case of the symbol at left, it means that the powercord plug must be unplugged from the outlet. 001 010 · Before using this unit, make sure to read the instructions below, and the Owner's Manual. .......................................................................................................... 002a · Do not open or perform any internal modifications on the unit. .......................................................................................................... 003 · Do not attempt to repair the unit, or replace parts within it (except when this manual provides specific instructions directing you to do so). Refer all servicing to your retailer, the nearest Roland Service Center, or an authorized Roland distributor, as listed on the "Information" page. .......................................................................................................... 004 · This unit, either alone or in combination with an amplifier and headphones or speakers, may be capable of producing sound levels that could cause permanent hearing loss. Do not operate for a long period of time at a high volume level, or at a level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should immediately stop using the unit, and consult an audiologist. ........................................................................................................... 011 · Do not allow any objects (e.g., flammable material, coins, pins); or liquids of any kind (water, soft drinks, etc.) to penetrate the unit. ........................................................................................................... 012a · Never use or store the unit in places that are: · Subject to temperature extremes (e.g., direct sunlight in an enclosed vehicle, near a heating duct, on top of heat-generating equipment); or are · Damp (e.g., baths, washrooms, on wet floors); or are · Humid; or are · Exposed to rain; or are · Dusty; or are · Subject to high levels of vibration. .......................................................................................................... 008a · Immediately turn the power off, remove the power cord from the outlet, and request servicing by your retailer, the nearest Roland Service Center, or an authorized Roland distributor, as listed on the "Information" page when: · The power-supply cord or the plug has been damaged; or · If smoke or unusual odor occurs · Objects have fallen into, or liquid has been spilled onto the unit; or · The unit has been exposed to rain (or otherwise has become wet); or · The unit does not appear to operate normally or exhibits a marked change in performance. ........................................................................................................... 013 · The unit should be connected to a power supply only of the type described in the operating instructions, or as marked on the rear side of unit. .......................................................................................................... 009 · Do not excessively twist or bend the power cord, nor place heavy objects on it. Doing so can damage the cord, producing severed elements and short circuits. Damaged cords are fire and shock hazards! .......................................................................................................... · In households with small children, an adult should provide supervision until the child is capable of following all the rules essential for the safe operation of the unit. ........................................................................................................... 014 · Protect the unit from strong impact. (Do not drop it!) ........................................................................................................... 3 015 · Do not force the unit's power-supply cord to share an outlet with an unreasonable number of other devices. Be especially careful when using extension cords--the total power used by all devices you have connected to the extension cord's outlet must never exceed the power rating (watts/amperes) for the extension cord. Excessive loads can cause the insulation on the cord to heat up and eventually melt through. .......................................................................................................... 016 101a · The unit should be located so that its location or position does not interfere with its proper ventilation. ........................................................................................................... 102a · Always grasp only the plug on the power-supply cord when plugging into, or unplugging from an outlet. ........................................................................................................... 103a · Before using the unit in a foreign country, consult with your retailer, the nearest Roland Service Center, or an authorized Roland distributor, as listed on the "Information" page. .......................................................................................................... 026 · Do not put anything that contains water (e.g., flower vases) on this unit. Also, avoid the use of insecticides, perfumes, alcohol, nail polish, spray cans, etc., near the unit. Swiftly wipe away any liquid that spills on the unit using a dry, soft cloth. .......................................................................................................... · At regular intervals, you should unplug the power plug and clean it by using a dry cloth to wipe all dust and other accumulations away from its prongs. Also, disconnect the power plug from the power outlet whenever the unit is to remain unused for an extended period of time. Any accumulation of dust between the power plug and the power outlet can result in poor insulation and lead to fire. ........................................................................................................... 104 · Try to prevent cords and cables from becoming entangled. Also, all cords and cables should be placed so they are out of the reach of children. ........................................................................................................... 106 · Never climb on top of, nor place heavy objects on the unit. ........................................................................................................... 107a · Never handle the power cord or its plug with wet hands when plugging into, or unplugging from, an outlet. ........................................................................................................... 108a · Before moving the unit, disconnect the power plug from the outlet, and pull out all cords from external devices. ........................................................................................................... 109a · Before cleaning the unit, turn off the power and unplug the power cord from the outlet. ........................................................................................................... 110a · Whenever you suspect the possibility of lightning in your area, pull the plug on the power cord out of the outlet. ........................................................................................................... 120 · Always turn the phantom power off when connecting any device other than condenser microphones that require phantom power. You risk causing damage if you mistakenly supply phantom power to dynamic microphones, audio playback devices, or other devices that don't require such power. Be sure to check the specifications of any microphone you intend to use by referring to the manual that came with it. (This instrument's phantom power: 48 V DC, 10 mA Max) ........................................................................................................... 4 IMPORTANT NOTES 291b In addition to the items listed under "IMPORTANT SAFETY INSTRUCTIONS" and "USING THE UNIT SAFELY" on pages 2 and 4, please read and observe the following: Power Supply 301 Add · Do not connect this unit to same electrical outlet that is being used by an electrical appliance that is controlled by an inverter (such as a refrigerator, washing machine, microwave oven, or air conditioner), or that contains a motor. Depending on the way in which the electrical appliance is used, power supply noise may cause this unit to malfunction or may produce audible noise. If it is not practical to use a separate electrical outlet, connect a power supply noise filter between this unit and the electrical outlet. 307 · Do not allow objects to remain on top of the unit while it is in operation. · Do not sit or lean on top of the unit. Maintenance 401a · Before connecting this unit to other devices, turn off the power to all units. This will help prevent malfunctions and/or damage to speakers or other devices. 308 · For everyday cleaning wipe the unit with a soft, dry cloth or one that has been slightly dampened with water. To remove stubborn dirt, use a cloth impregnated with a mild, non-abrasive detergent. Afterwards, be sure to wipe the unit thoroughly with a soft, dry cloth. 402 · Never use benzine, thinners, alcohol or solvents of any kind, to avoid the possibility of discoloration and/or deformation. · Although the LEDs are switched off when the POWER switch is switched off, this does not mean that the unit has been completely disconnected from the source of power. If you need to turn off the power completely, first turn off the POWER switch, then unplug the power cord from the power outlet. For this reason, the outlet into which you choose to connect the power cord's plug should be one that is within easy reach and readily accessible. Additional Precautions 553 · Use a reasonable amount of care when using the unit's buttons, sliders, or other controls; and when using its jacks and connectors. Rough handling can lead to malfunctions. 556 Placement 351 · When connecting / disconnecting all cables, grasp the connector itself--never pull on the cable. This way you will avoid causing shorts, or damage to the cable's internal elements. 557 · Using the unit near power amplifiers (or other equipment containing large power transformers) may induce hum. To alleviate the problem, change the orientation of this unit; or move it farther away from the source of interference. 352a · A small amount of heat will radiate from the unit during normal operation. 558a · This device may interfere with radio and television reception. Do not use this device in the vicinity of such receivers. 352b · To avoid disturbing your neighbors, try to keep the unit's volume at reasonable levels. You may prefer to use headphones, so you do not need to be concerned about those around you (especially when it is late at night). 559a · Noise may be produced if wireless communications devices, such as cell phones, are operated in the vicinity of this unit. Such noise could occur when receiving or initiating a call, or while conversing. Should you experience such problems, you should relocate such wireless devices so they are at a greater distance from this unit, or switch them off. 354b · When you need to transport the unit, package it in the box (including padding) that it came in, if possible. Otherwise, you will need to use equivalent packaging materials. 562 · Do not expose the unit to direct sunlight, place it near devices that radiate heat, leave it inside an enclosed vehicle, or otherwise subject it to temperature extremes. Also, do not allow lighting devices that normally are used while their light source is very close to the unit (such as a piano light), or powerful spotlights to shine upon the same area of the unit for extended periods of time. Excessive heat can deform or discolor the unit. 355b · Some connection cables contain resistors. Do not use cables that incorporate resistors for connecting to this unit. The use of such cables can cause the sound level to be extremely low, or impossible to hear. For information on cable specifications, contact the manufacturer of the cable. 921 · To prevent malfunction and/or damage to speakers or other devices, always turn down the volume, and turn off the power on all devices before making any connections. 922 · When moved from one location to another where the temperature and/or humidity is very different, water droplets (condensation) may form inside the unit. Damage or malfunction may result if you attempt to use the unit in this condition. Therefore, before using the unit, you must allow it to stand for several hours, until the condensation has completely evaporated. 356 · This instrument is equipped with balanced XLR/TRS type jacks. Wiring diagrams for these jacks are shown below. Make connections after first checking the wiring diagrams of other equipment you intend to connect. fig.XLR/TRSJack.eps · Do not allow rubber, vinyl, or similar materials to remain on the unit for long periods of time. Such objects can discolor or otherwise harmfully affect the finish. 359 941 · Do not paste stickers, decals, or the like to this instrument. Peeling such matter off the instrument may damage the exterior finish. 360 · Once the connections have been completed (p. 11), turn on power to your various devices in the order specified. By turning on devices in the wrong order, you risk causing malfunction and/or damage to speakers and other devices. When powering up: Turn on the power to the AC-90 last. When powering down: Turn off the power to the AC-90 first. Add · Depending on the material and temperature of the surface on which you place the unit, its rubber feet may discolor or mar the surface. You can place a piece of felt or cloth under the rubber feet to prevent this from happening. If you do so, please make sure that the unit will not slip or move accidentally. · Wrap the AC cord around the cord hook when trans-porting or storing the unit. 5 Contents USING THE UNIT SAFELY ............................................3 IMPORTANT NOTES ......................................................5 Contents..............................................................................6 Español Principales características ...................................47 Nombres de componentes y sus funciones......48 Panel de control ........................................48 Panel trasero ..............................................52 Ejemplo de uso de dos canales combinados ....54 Cómo utilizar el soporte plegable .....................55 Utilización de un soporte de altavoz ................56 English Main Features .........................................................7 Names of Things and What They Do .................8 Control Panel...............................................8 Rear Panel ..................................................12 Example of Using Two Channels Combined...14 How to Use the Folding Stand...........................15 Using a Speaker Stand ........................................16 Português Principais características .....................................57 Nomes das partes e suas funções ......................58 Painel de controle .....................................58 Painel traseiro............................................62 Exemplo de uso de dois canais combinados....64 Como utilizar o suporte dobrável .....................65 Utilizando um suporte para alto-falante ..........66 Deutsch Hauptmerkmale ...................................................17 Bezeichnungen und Funktionen der Bedienelemente ....................................................18 Bedienfeld..................................................18 Rückseite....................................................22 Beispiel für die kombinierte Verwendung zweier Kanäle .......................................................24 Verwendung des ausklappbaren Bügels..........25 Verwenden eines Lautsprecherstativs..............26 Nederlands Belangrijkste kenmerken.....................................67 Namen van onderdelen en hun functies ..........68 Voorpaneel ................................................68 Achterpaneel .............................................72 Voorbeeld van gecombineerd gebruik van twee kanalen .........................................................74 De vouwstandaard gebruiken ...........................75 Een luidsprekerstandaard gebruiken ...............76 Block Diagram .................................................................77 How to Use the Carrying Case......................................77 Specifications ...................................................................78 Français Caractéristiques principales ...............................27 Noms et fonctions des éléments ........................28 Panneau de commande ...........................28 Panneau arrière.........................................32 Exemple d'utilisation de deux canaux ensemble................................................................34 Utilisation du pied pliant....................................35 Utilisation d'un pied pour haut-parleur ..........36 Italiano Caratteristiche principali ....................................37 Denominazione e utilizzo delle funzioni .........38 Pannello di controllo ................................38 Pannello posteriore ..................................42 Esempio di utilizzo di due canali combinati ...44 Modalità di utilizzo del supporto pieghevole .45 Utilizzo di un supporto casse.............................46 6 Main Features The AC-90 is a high-performance monitor amp developed exclusively for use with acoustic instruments. It is capable of faithfully expressing all the harmonic richness of an acoustic instrument's sound. Compact, High-Performance Stereo Amp · The finely tuned design of the cabinet is meant to enhance the sound of acoustic instruments. Within this cabinet, there are two 8 inch woofers, two tweeters, and a 45 W + 45 W stereo amp--all of which were newly designed just for the AC-90. As a result, the unit is capable of delivering a more natural, acoustic instrument sound across a broad range of frequencies. · Thanks to a power amp that was designed to be as light as possible, and the use of new materials for the woofers, an overall reduction in the weight of the unit has been achieved. Mute Function · The provided Mute switch makes it easy for you to mute the sounds for the AC-90's own speakers as well as the sounds from LINE OUT. By using the Mute function, you can plug in and out noiselessly at the guitar. Furthermore, when you have a tuner connected to TUNER OUT, the Mute function lets you tune your instrument without outputting any sound. · You can connect an optional foot switch and use your foot to turn this on and off. External Input Jacks (AUX IN) · Includes external input jacks, allowing you to connect a CD player, backing machine, or other device in stereo. · These include both RCA phono jacks and 1/4" phone jacks, making it possible to connect just about any kind of device. Features Two Independent Channels, GUITAR and MIC/LINE · Each channel includes a 3-band equalizer. · GUITAR channel handles both piezo and magnetic pickups. · The MIC/LINE channel offers phantom power, produced by highly reliable, dedicated 48 V output phantom circuitry. · Using the MIC/LINE channel for LINE input allows you to connect guitars with magnetic pickups. You can also use a piezo pickup (GUITAR channel) and a magnetic pickup (MIC/LINE channel) at the same time, and mix (blend) the sounds together. Multiple Output Connectors · Features DI Out, which allow you to directly output the signals input from connected instruments and mics. You can also connect a tuner. TRS balanced output is supported. · Line outs feature 1/4" phone mono-output jacks in addition to XLR connectors for stereo output. You can use a single AC-90 for all applications. · It also features a Subwoofer Out. Connecting a powered subwoofer allows you to play with an even punchier, more powerful low end. · The amp also provides a headphones jack, which you can use when playing during nighttime hours and when making sound checks. · Three kinds of stereo chorus effects are provided. There is the spatially synthesized "SPACE" chorus, the "RICH" chorus (which is divided into frequency bands), and the "WIDE" chorus (which is also divided into frequency bands while offering even greater expansiveness). · Includes stereo reverb developed especially for acoustic instruments. This allows you to add a sense of spaciousness and natural body to the sound. · Equipped with delay effects that can produce sound with a tonal quality that is soft and tuned specifically for acoustic instruments. · An optional foot switch can also be used to turn the effects on and off. Convenient Placement Features · Equipped with a "folding stand," which allows you to change the angle of the amp when using it for monitoring purposes. · Includes a "speaker stand adapter," which allows you to attach the AC-90 to a speaker stand. This makes using the AC-90 easier when you are performing standing up, and allows you to use the amp as a simple PA. · Also included is a carrying case for greater portability. Anti-Feedback Suppresses Feedback · Anti-feedback features two ways to detect the feedback point. You can use the "Manual settings," or you can use the "Auto settings," which provide for the automatic detection of the feedback point. · You can connect an optional foot switch and use your foot to operate this feature. 7 Nederlands Português Español High-Quality Digital Effects Italiano Français Deutsch English Names of Things and What They Do Control Panel fig.010 12 3 6 7 8 9 10 11 16 17 45 1. INPUT (GUITAR CHANNEL) Connect guitars here. 12 13 14 15 18 3. SHAPE Button Setting this to ON modifies the midrange to create a bright tone suitable for strumming chords. This emphasizes brushing sounds, allowing you to strum with a more edgy feeling. (MIC/LINE CHANNEL) Connect mics and line-level devices here. You can also connect guitars with pickups equipped with preamps. This handles balanced input, so you can connect 1/4" phone TRS jacks and XLR-type connectors. fig.030 4. PHANTOM Switch This turns the phantom power on and off. Set this to "ON" when connecting mics that require phantom power (condenser mic, etc.). Set this to "OFF" when connecting mics that do not require phantom power or other devices. TRS XLR · Use the following sequence when connecting mics that require phantom power: 1.Turn the PHANTOM switch off. 2.Connect the mic. 3.Turn the PHANTOM switch on. · Supplying phantom power to mics that do not require it or supplying it to other devices may cause such equipment to malfunction. Always be sure to turn the switch off before connecting. * To protect the circuitry, all output is muted momentarily after the PHANTOM switch is turned on or off. * Phantom power is supplied only to the XLR connectors for the MIC/LINE channel INPUT. * Noise may be produced if connectors are connected or disconnected while the phantom power is turned on. You can use the two channels in combination. Refer to "Example of Using Two Channels Combined" (p. 14). 983 * Feedback could be produced depending on the location of microphones relative to speakers. This can be remedied by: · Changing the orientation of the microphone(s). · Relocating microphone(s) at a greater distance from speakers. · Lowering volume levels. 2. PICKUP Button This switches the input circuitry for either piezo or magnetic pickups, according to the type of pickup on the connected guitar. Press down the button for magnetic pickups. * Set this to "MAGNETIC" if your guitar has an active pickup equipped with a preamp. 8 Names of Things and What They Do Phantom Power Because they have a comparatively wider range and better sound quality than dynamic mics, condenser mics are often used for miking acoustic guitars. However, they require a power source to operate. Although some condenser mics run off batteries placed within the mic housing, in many cases a type of power supply known as "phantom power" is required. This power supply uses the existing mic cable to feed power. The AC-90's phantom power is output at a constant 48 V, so it conforms to professional specifications required at recording studios. 9. TREBLE Knobs English Nederlands Português Español Italiano Français Deutsch Adjust the level of the high-frequency range. The tone of an acoustic instrument can vary immensely from one instrument to the next. The kind of sound required also varies according to how an instrument is being used in a particular ensemble. Actively use the BASS, MIDDLE, and TREBLE knobs to adjust the tone to suit the instrument you are using and the conditions in which it is being used. (Example) · When using the AC-90 with the speaker stand attached, you may want to turn up the BASS knob so the lower range is perceived better. · If the sound seems too harsh, such as immediately after changing strings, you may want to turn down the TREBLE knob to cut back on the high frequencies. 5. SELECT Button This switches the input level to match that of the connected device (mic or line). You can connect guitars with magnetic pickups when LINE is selected with the SELECT button. * Note that the volume is increased if the switch is set to "MIC" when you have a line-level device connected. 10. CHORUS Buttons Switch chorus on and off. When on, the indicator is lit. 6. VOLUME Knobs (GUITAR CHANNEL) Adjusts the volume of the GUITAR channel. * To accommodate the lower output of piezo pickups, the volume level when the VOLUME knob is between the 7 and 10 positions is set somewhat higher when the PICKUP button is set to PIEZO in comparison with the MAGNETIC setting. You can use a foot switch (the optional BOSS FS-5U) to switch chorus on and off. Turning chorus on and off with the foot switch works on both channels. 11. CHORUS Knob Turn this knob to select among the three types of chorus (SPACE, RICH, and WIDE). You can adjust the amount of effect applied by changing the position of the knob. * This is enabled when the CHORUS button is in the ON position. * The markings indicating the SPACE and RICH positions are approximate. Listen to the sound to confirm the effect as you make adjustments. (MIC/LINE CHANNEL) Adjusts the volume of the MIC/LINE channel. * When using the AC-90 with the GUITAR channel and MIC/ LINE channel mixed, adjust the volume balance between the two channels with the VOLUME knob. 7. BASS Knobs Adjust the level of the low-frequency range. SPACE This is a spacially synthesized chorus. With spacially synthesized chorus, a method available only in stereo, the chorus effect is created by taking the sound from the right speaker (from which the effect sound is output), and the sound from the left speaker (which outputs the direct sound), and then mixing them in the actual space. This creates a greater lateral spread than that produced when the sounds are mixed electronically, providing a more natural sense of breadth. 8. MIDDLE Knobs Adjust the level of the midrange. 9 Names of Things and What They Do RICH This is a stereo chorus that is divided into three frequency ranges. Here, the effect is separated into three bands, low-frequency, midrange, and high-frequency, and by applying the most suitable amount of chorus effect in each range, it provides a sense of fullness and breadth that is perfectly suited to the acoustic guitar. The low end is firmly in the center, and sound spreads out more and more as the sound rises from the midrange up through the higher frequencies. fig.031 MANUAL * Turn the knob to "OFF" if you are not using anti-feedback. 14. START Button This is used for Auto settings (p. 11). Pressing the button performs automatic detection of feedback-whine frequencies. The indicators show the operating status of the automatic detection function. Standby: Flashes slowly During Detection: Flashes rapidly After Detection: Remains lit * Holding down the START button for one second or longer returns the unit to standby for automatic detection. WIDE While also relying on the division of sound into separate bands, this chorus offers even greater expansiveness than RICH. The sound image spreads beyond the AC-90's speakers, producing an effect that seems to envelope the listener in sound. 12. REVERB/DELAY Knob You can adjust this knob to switch between the reverb and delay effects. You can adjust the amount of effect applied by changing the position of the knob. * Turn the knob to "OFF" if you are not using the reverb or delay effect. * The markings indicating the reverb and delay positions are approximate. Listen to the sound to confirm the effect as you make adjustments. How to Use ANTI-FEEDBACK fig.32 Anti-feedback is a function that controls feedback that arises between the guitar or mic and the amp. The feedback is suppressed by attenuating the frequency at which the feedback occurs. * This is not designed to work with respect to the high-frequency feedback that can occur when using microphones. Anti-feedback can be used in two different ways; you can make use of either the "Auto settings" or the "Manual settings." * Use either when feedback whine occurs. Feedback This is a phenomenon whereby signals output from the speakers are picked up again by the mic or pickup, and the sound is further amplified and output from the speakers, resulting in an unpleasant oscillating sound. * If the anti-feedback alone does not control the feedback, adjust your settings, for example by lowering the volume or cutting the low frequencies. * To prevent feedback during a performance, we recommend making the anti-feedback setting before the performance. REVERB This stereo reverb, developed especially for acoustic instruments, gives a sense of spaciousness and natural sonic quality. Turn the knob to adjust the volume of the reverb effect. DELAY This delay, developed especially for acoustic instruments, adds soft reflections to the original sound. Turn the knob to change the delay time. * You can use a foot switch (the optional BOSS FS-5U) to switch the reverb and delay on and off. 13. FREQUENCY Knob This selects the frequency at which the anti-feedback function operates. Also, the position of the knob determines whether Auto or Manual settings are selected. 10 Names of Things and What They Do Setting the Feedback Point Automatically This automatically detects the frequency at which feedback occurs and suppresses feedback. * Use in conditions where feedback occurs. 1. Cause feedback whine to occur. 2. Turn the FREQUENCY knob to the "AUTO" position. fig.033 15. MUTE Button When you press the button, the MUTE indicator flashes, muting is turned on, and the speaker output and sounds from SUB WOOFER OUT and LINE OUT are muted. With the mute function activated, you do not need to turn down the VOLUME knob or MASTER knob to mute the noise when plugging into, or unplugging from your guitar. * Sounds from the DI OUT/TUNER OUT and PHONES jacks are not muted. The ANTI-FEEDBACK indicator flashes slowly, and automatic detection goes into standby. 3. Press the START button. Automatic detection of the feedback point starts. The indicator flashes rapidly when detection is in progress, and when the feedback point is found, the indicator lights steadily. If no feedback point is detected, the indicator flashes slowly, and the automatic detection function returns to standby. 4. Press the START button once more to conduct the automatic detection again. You can use a foot switch (optional BOSS FS-5U or FS-6) to switch muting on and off. (p. 13) 16. MASTER Knob * LINE OUT cannot be adjusted. Setting the Feedback Point Manually 1. Cause feedback whine to occur. 2. Turn the knob, moving through the range of L through H (the ANTI-FEEDBACK indicator lights up) to search for the frequency at which the feedback is to be suppressed. fig.34 17. PHONES Jack Headphones are connected here. No sounds are output from the speakers or from SUB WOOFER OUT when headphones are connected. 18. POWER Switch This turns the AC-90's power on and off. The POWER indicator lights up when the power is on. 945 942 Turning the knob clockwise suppresses progressively more treble feedback, and turning it counterclockwise suppresses progressively more bass feedback. * Due to a circuitry protection feature, this unit requires a few moments after it has been turned on before it is ready for normal operation. 943 You can use a foot switch (the optional BOSS FS-5U, FS-6) to run automatic detection of the feedback frequency or to turn the anti-feedback function on and off. You can use anti-feedback even when feedback is not a problem. For example, you can use it to remove undesirable resonance in the low to midrange, as well as correct other problems with the sound quality. 11 Nederlands * Always make sure to have the volume level turned down before switching on power. Even with the volume all the way down, you may still hear some sound when the power is switched on, but this is normal, and does not indicate a malfunction. Português * If you need to turn off the power completely, first turn off the POWER switch, then unplug the power cord from the power outlet. Refer to Power Supply (p. 5) Español Italiano Adjusts the overall volume level. Français By connecting a tuner (optional) to DI OUT/TUNER OUT and then pressing the MUTE button, you can tune your instrument without the sound being output from the speakers. Deutsch English This switches the Mute function on and off. Names of Things and What They Do Rear Panel fig.040 1 2 3 4 5 * PCS-31 White Red Drum Machine Mute On/Off Anti-Feedback CD Player Powered Sub Woofer White PCS-31 Red Mixer 926a Recorder Mixer Tuner Chorus On/Off Reverb/Delay On/Off * When connection cables with resistors are used, the volume level of equipment connected to the inputs may be low. If this happens, use connection cables that do not contain resistors. 1. LINE OUT Jacks You can connect a mixer, recording device, or other device here. The output level is +4 dBu. Included here are XLR connectors (L/R: stereo output) and a 1/4" phone jack (mono output). fig.090 2. SUB WOOFER OUT Jack You can connect a powered subwoofer to play back sounds with an even punchier, more powerful low end. The volume is adjusted with the MASTER knob. 3. AUX IN Jacks You can connect a CD player, drum machine, or other device and play back sounds in stereo. Both RCA phono jacks and 1/4" phone jacks are provided. When connected to only the left 1/4" phone jack, playback is in mono. Although the input from AUX IN is output from the speakers, PHONES, and SUB WOOFER OUT, it is not output from LINE OUT. The volume is adjusted with the MASTER knob, and muting on/off for these sounds is controlled with * You cannot adjust the volume for LINE OUT with the MASTER knob. * The chorus effects are designed so they exhibit the greatest effectiveness when you use the unit's built-in speakers. Effectiveness may differ when LINE OUT is used instead of the built-in speakers. 12 Names of Things and What They Do the MUTE button. If devices are connected to both the RCA phono jacks and the 1/4" phone jacks, the two inputs are mixed. (MUTE, ANTI-FEEDBACK) Connecting a foot switch pedal (optional BOSS FS-5L, FS-5U, or FS-6) using a connection cable (the optional PCS-31) makes it possible to use a latch-type foot switch (the FS-5L or FS-6) to switch muting on and off, or to use a momentary-type foot switch (the FS-5U or FS-6) to control the anti-feedback feature. * For information on the settings for the FS-6, refer to the owner's manual for the FS-6. fig.050 4. DI OUT/TUNER OUT Jack The direct sound of the device or instrument connected to the GUITAR or MIC/LINE channel is output here. This is a 1/4" phone TRS jack with balanced output. You can also use this jack to connect a tuner. fig.070 * If balanced output is not required, use a 1/4" phone (mono) plug to connect to this jack. If balanced output is not required, you can use the special connection cable (the optional PCS-31) to use the DI OUT and TUNER OUT simultaneously. fig.080 * The MUTE button should be set to off when a foot switch is connected for muting. You cannot switch the muting off by pressing the foot switch when the MUTE button is on (when the MUTE indicator is lit). * When using an FS-5U (momentary type) to switch muting on and off, the muting is switched on only while the switch is held down. For anti-feedback, a foot switch will function as follows: · When the FREQUENCY knob is positioned in the range from L to H, the switch turns the anti-feedback function on and off. · When the FREQUENCY knob is positioned at AUTO, the switch functions as the START switch for the automatic detection. Holding the foot switch down for one second or longer returns the automatic detection function to standby mode. PCS-31 White Red Tuner Recoreder A phase-inverted signal is output from the COLD side (the red side of the PCS-31). Connect the recording device to the HOT side (the white side of the PCS-31) 5. FOOT SW Jacks The AC-90 accepts the BOSS FS-5L (latch type), BOSS FS-5U (momentary type), and BOSS FS-6 foot switch pedals. * Set the polarity switch as shown below. fig.071 Using a special connection cable (the optional PCS-31) to connect two foot switches (the optional BOSS FS-5U), you can use one FS-5U to switch the chorus on and off, and use the other FS-5U to switch the delay or reverb on and off. fig.060 When a 1/4" phone (mono) plug is used to connect only one foot switch, only the chorus on/off function is enabled. * The chorus on/off function works on both channels. * You cannot switch the chorus on and off by pressing the foot switch when the CHORUS button is off. 13 Nederlands Português (CHORUS, DELAY/REVERB) Español Italiano Français When a 1/4" phone (mono) plug is used to connect only one foot switch, only the Mute on/off function is enabled. In such cases, you should use a latch-type foot switch pedal (such as the BOSS FS-5L) Deutsch English Example of Using Two Channels Combined When Using a Mic and a Pickup GUITAR CHANNEL: Piezo or Magnetic Pickup MIC/LINE CHANNEL: Condenser or Dynamic mic (SELECT button = MIC) This allows you to blend the fat midrange of the pickup with the mic's delicate high end. Set the PHANTOM switch to ON if using a condenser mic. PIEZO or MAGNETIC Condenser mic or Dynamic mic When Using Two Guitars GUITAR CHANNEL: Guitar 1 Guitar 2 Piezo or Magnetic Pickup Magnetic Pickup (SELECT button = LINE) Guitar 1 MIC/LINE CHANNEL: You can switch guitars without having to readjust the volume and tone. PIEZO or MAGNETIC Guitar 2 MAGNETIC When Using One Guitar with Two Types of Pickups GUITAR CHANNEL: PiezoPickup (PICKUP button = PIEZO) MIC/LINE CHANNEL: Magnetic Pickup (SELECT button = LINE) You can balance the volume levels using each channel's VOLUME knob, and adjust the tone for each pickup to attain the optimal sound with the equalizer (BASS/MIDDLE/TREBLE) knobs. PIEZO MAGNETIC 14 How to Use the Folding Stand When using the AC-90 on floors, or in other low-lying positions, then setting up and using the folding stand can make it easier to hear the sound from the speakers. fig.100 · When using the folding stand, always be sure to place it so the AC-90 remains level. · When not using the folding stand, fold it up. Folding stand · Never lift up and carry the AC-90 by holding the folding stand. · Never place any objects on top of the AC-90 when using the folding stand. Also, never sit or lean on the folding stand. · When folding the folding stand, be careful not to pinch your fingers. 15 Nederlands Português Español Italiano Français Deutsch English Using a Speaker Stand By using a speaker stand, you can mount the AC-90 at the optimal height for use as a monitor speaker or simple PA device. The AC-90 is designed to be used only with speaker stands whose dimensions meet the specifications described below. Do not use it with a speaker stand that does not meet the following specifications. fig.120 Before use, adjust the speaker stand to a height of 140 cm (55-1/8") or less and a leg spread of 120 cm (47-1/4") or more, as shown in the figure below. fig.110\ Diameter: 3.8 cm (1-1/2") 140 cm or less (55-1/8") Leg spread: 120 cm or more (47-1/4") 120 cm or more fig.130 (47-1/4") Using a speaker stand that does not meet the specifications at left or that is adjusted to a height over Diam eter: 136 c (53-9 m or mo r /16") 140 cm (55-1/8"), or a leg spread of less than 120 cm (471/4") may result in damage to equipment or injury due to e the stand tipping over. When using the AC-90 with a speaker stand, the speaker stand must be carefully placed so it is level and sure to remain stable. Cables connected to the AC-90 should be given enough Leg spread: 120 cm or more (47-1/4") slack to prevent accidents that might result from someone tripping over them. To prevent accidents due to falls, do not place any object on the AC-90 when it's mounted on a speaker stand. Always have at least one other person assist you when mounting the AC-90 on a speaker stand, or when adjusting the height of the stand while the AC-90 remains mounted on it. 16 Hauptmerkmale Der AC-90 ist ein speziell zur Verwendung mit akustischen Instrumenten entwickelter Hochleistungs-Monitorverstärker. Er ist in der Lage, den gesamten harmonischen Klangreichtum eines akustischen Instruments originalgetreu auszudrücken. Kompakter HochleistungsStereoverstärker · Das fein abgestimmte Gehäusedesign ist dazu ausgelegt, den Klang akustischer Instrumente zu bereichern. In diesem Gehäuse befinden sich zwei 20-cm-Woofer, zwei Tweeter und ein 2 x 45 W-Stereoverstärker ­ die alle speziell für den AC-90 neu entwickelt werden. Als Resultat ist das Gerät in der Lage, in einem breiten Frequenzspektrum einen natürlicheren Akustikinstrumentenklang zu erzeugen. · Durch den so leicht wie möglich konstruierten Aktivverstärker und den Einsatz neuer Materialien für die Woofer wurde eine Verringerung des Gesamtgewichts des Geräts erreicht. Stummschaltungsfunktion (Mute) · Der Mute-Schalter macht es Ihnen leicht, den Klang der eigenen Lautsprecher des AC-90 sowie den Klang über LINE OUT stumm zu schalten. Mit Hilfe der MuteFunktion können Sie die Gitarre geräuschlos anschließen und trennen. Außerdem können Sie, wenn Sie an TUNER OUT ein Stimmgerät anschließen, Ihr Instrument mit der Mute-Funktion stimmen, ohne dass Ton ausgegeben wird. · Sie können einen optionalen Fußschalter anschließen und diese Funktion mit dem Fuß ein- und ausschalten. Externe Eingangsbuchsen (AUX IN) · Der Verstärker besitzt externe Eingangsbuchsen, an die Sie Stereosignale von einem CD-Spieler, einer Begleitungsmaschine oder einem anderen Gerät anschließen können. · Die Eingänge verfügen sowohl über Cinch-Buchsen als auch 6,3-mm-Klinkenbuchsen, sodass praktisch jedes beliebige Gerät angeschlossen werden kann. · Zu jedem Kanal gehört ein 3-Band-Equalizer. · Der GUITAR-Kanal kann sowohl für piezoelektrische als auch magnetische Tonabnehmer verwendet werden. · Der MIC/LINE-Kanal bietet eine Phantomspeisung, die durch eine äußerst zuverlässige, dezidierte Phantomspeisungsschaltung mit einer Ausgangsspannung von 48 V erzeugt wird. · Mit Hilfe des MIC/LINE-Kanals für LINE-Eingänge können Sie Gitarren mit magnetischen Tonabnehmern anschließen. Sie können auch einen piezoelektrischen (GUITAR-Kanal) und einen magnetischen Tonabnehmer (MIC/LINE-Kanal) gleichzeitig verwenden und die Klänge zusammenmischen. Mehrere Ausgangsanschlüsse · Über den Ausgang DI OUT werden die von angeschlossenen Instrumenten und Mikrofonen eingehenden Signale direkt ausgegeben. Zudem können Sie ein Stimmgerät anschließen. Die Ausgabe über symmetrische Klinkenbuchsen wird unterstützt. · Zu den Line-Ausgängen gehören neben den XLRAnschlüssen für den Stereo-Ausgang auch 6,3-mm-MonoAusgangsbuchsen. Sie können einen einzigen AC-90 für alle Zwecke einsetzen. · Zusätzlich besitzt der Verstärker einen SubwooferAusgang. Wenn Sie einen Aktiv-Subwoofer anschließen, können Sie mit einem noch kraftvolleren, stärkeren unteren Frequenzbereich spielen. · Der Verstärker ist darüber hinaus mit einer Kopfhörerbuchse ausgestattet, die Sie zum Spielen während der Nacht oder für Soundchecks nutzen können. · Es stehen drei Arten von Stereo-Choruseffekten zur Verfügung. Dies sind der räumlich synthetisierte Chorus-Effekt ,,SPACE", der Chorus-Effekt ,,RICH" (der in Frequenzbänder unterteilt ist) und der Chorus-Effekt ,,WIDE" (der ebenfalls in Frequenzbänder unterteilt ist, dabei aber eine noch größere Tragweite bietet). · Speziell für akustische Instrumente entwickelter StereoHalleffekt (Reverb). Dieser ermöglicht Ihnen, dem Klang Raumwirkung und natürliche Substanz zu verleihen. · Echoeffekte (Delay), die Klänge mit einer weichen und speziell auf akustische Instrumente abgestimmten Tonqualität erzeugen können. · Ein optionaler Fußschalter zum Ein- und Ausschalten der Effekte verwendet werden. Praktische Aufstellmöglichkeiten · Der Verstärker besitzt einen ausklappbaren Bügel, durch den der Winkel des Verstärkers bei Verwendung als Monitor verstellt werden kann. · Mit dem Lautsprecherstativ-Adapter können Sie den AC-90 auf einem Lautsprecherstativ aufstellen. Dies erleichtert Ihnen die Verwendung des AC-90 bei Auftritten im Stehen und ermöglicht Ihnen, den Verstärker als einfache PA-Anlage zu verwenden. · Im Lieferumfang ist auch ein Tragekoffer enthalten, damit das Gerät besser transportiert werden kann. Anti-Feedback-Funktion unterdrückt Rückkopplungen · Die Anti-Feedback-Funktion bietet zwei Erkennungsarten für den Rückkopplungspunkt. Sie können die ,,Manual Settings" (manuellen Einstellungen) verwenden, oder Sie können die ,,Auto Settings" (automatischen Einstellungen) nutzen, mit denen der Rückkopplungspunkt automatisch erkannt wird. · Sie können einen optionalen Fußschalter anschließen und diese Funktion mit dem Fuß steuern. 17 Nederlands Português Español Hochwertige Digitaleffekte Italiano Français Zwei unabhängige Kanäle: GUITAR und MIC/LINE Deutsch English Bezeichnungen und Funktionen der Bedienelemente Bedienfeld Abb. 010 12 3 6 7 8 9 10 11 16 17 45 1. INPUT (Eingänge) (GUITAR CHANNEL) Schließen Sie hier Gitarren an. 12 13 14 15 18 3. Taste SHAPE (Form) Wenn Sie diese Taste einschalten (ON), wird der mittlere Frequenzbereich so modifiziert, dass ein strahlender Klang erzeugt wird, der sich zum Schlagen von Akkorden eignet. Dies betont die Saitenanschlagsklänge, so dass Sie die Saiten mit schärferen Ausdruck anschlagen können. (MIC/LINE CHANNEL) Schließen Sie hier Mikrofone und Geräte mit Line-Pegel an. Sie können auch Gitarren anschließen, deren Tonabnehmer Vorverstärker besitzen. Es werden symmetrische Eingänge verwendet, sodass Sie 6,3-mm-Klinken- und XLR-Stecker anschließen können. Abb. 030 4. Schalter PHANTOM Schaltet die Phantomspeisung ein und aus. Schalten Sie diesen Schalter ein (ON), wenn Sie Mikrofone anschließen, die eine Phantomspeisung benötigen (Kondensatormikrofon usw.). Schalten Sie ihn aus (OFF), wenn Sie Mikrofone, die keine Phantomspeisung benötigen, oder andere Geräte anschließen. TRS XLR · Gehen Sie in folgender Reihenfolge vor, wenn Sie Mikrofone anschließen, die eine Phantomspeisung benötigen: 1. Schalten Sie den PHANTOM-Schalter aus. 2. Schließen Sie das Mikrofon an. 3. Schalten Sie den PHANTOM-Schalter ein. · Wenn Mikrofone, die keine Phantomspeisung benötigen, oder andere Geräte mit eingeschalteter Phantomspeisung betrieben werden, kann dies zu Fehlfunktionen der Mikrofone bzw.Geräte führen. Achten Sie immer darauf, den Schalter auszuschalten, bevor Sie den Anschluss vornehmen. * Um die Schaltungen zu schützen, werden alle Ausgänge nach dem Ein- oder Ausschalten des PHANTOM-Schalters vorübergehend stumm geschaltet. * Die Phantomspeisung erfolgt nur über die XLR-Anschlüsse für den Eingang des MIC/LINE-Kanals. * Wenn Anschlüsse bei eingeschalteter Phantomspeisung vorgenommen oder getrennt werden, kann es zu Störgeräuschen kommen. Sie können die beiden Kanäle in Kombination verwenden. Siehe hierzu ,,Beispiel für die kombinierte Verwendung zweier Kanäle" (S. 24). 983 * Je nach dem Aufstellort von Mikrofonen im Verhältnis zu den Lautsprechern könnten Rückkopplungen erzeugt werden. Dies können Sie beheben, indem Sie: · Die Richtung des Mikrofons/der Mikrofone ändern. · Das Mikrofon/die Mikrofone in größerer Entfernung von den Lautsprechern aufstellen. · Die Lautstärkepegel herunterregeln. 2. Taste PICKUP (Tonabnehmer) Hiermit schalten Sie die Eingangsschaltungen entweder für piezoelektrische oder für magnetische Tonabnehmer um, je nachdem, welche Tonabnehmerart die angeschlossene Gitarre besitzt. Drücken Sie die Taste für magnetische Tonabnehmer. * Bringen Sie die Taste in die Stellung ,,MAGNETIC", wenn Ihre Gitarre einen Aktivtonabnehmer mit Vorverstärker besitzt. 18 Bezeichnungen und Funktionen der Bedienelemente Phantomspeisung Da sie verglichen mit dynamischen Mikrofonen ein breiteres Frequenzspektrum und eine bessere Klangqualität besitzen, werden für akustische Gitarren häufig Kondensatormikrofone verwendet. Für ihren Betrieb wird jedoch eine Stromquelle benötigt. Einige Kondensatormikrofone arbeiten zwar mit Batterien, die sich im Mikrofongehäuse befinden, doch in vielen Fällen wird die als ,,Phantomspeisung" bezeichnete Art der Stromversorgung benötigt. Diese Stromversorgung nutzt das vorhandene Mikrofonkabel, um das Mikrofon mit Strom zu versorgen. Die Phantomspeisung des AC-90 besitzt eine konstante Spannung von 48 V und entspricht somit den in Aufnahmestudios erforderlichen professionellen Spezifikationen. 9. Regler TREBLE (Höhen) English Nederlands Português Español Italiano Français Deutsch Regeln den Pegel des hohen Frequenzbereichs. Die Klangfarbe akustischer Instrumente kann von einem Instrument zum nächsten enorm variieren. Die gewünschte Art des Klangs variiert ebenfalls je nachdem, wie ein Instrument in einem bestimmten Ensemble eingesetzt wird. Verwenden Sie aktiv die Regler BASS, MIDDLE und TREBLE, um die Klangfarbe so einzustellen, dass sie zu dem von Ihnen verwendeten Instrument und den Umständen passt, in denen es verwendet wird. (Beispiel) · Wenn Sie den AC-90 mit Lautsprecherstativ aufgestellt verwenden, möchten Sie vielleicht den BASS-Regler hochdrehen, damit der Tiefenbereich besser wahrgenommen wird. · Wenn der Klang zu scharf wirkt, beispielsweise unmittelbar nach dem Wechseln der Saiten, möchten Sie vielleicht den TREBLE-Regler herunterdrehen, um die hohen Frequenzen zu dämpfen. 5. Taste SELECT (Auswahl) Schaltet den Eingangspegel passend für das angeschlossene Gerät um (Mikrofon oder Line-Pegel-Gerät). Wenn mit der SELECT-Taste die Einstellung LINE ausgewählt wird, können Sie Gitarren mit magnetischen Tonabnehmern anschließen. * Beachten Sie, dass die Lautstärke zunimmt, wenn der Schalter auf ,,MIC" gestellt wird, während ein Gerät mit Line-PegelAusgang angeschlossen ist.