User manual SAMSON S.PHONE HEADPHONE MIXER AMP

S Class Signal Processors MASTER LEVEL dB -30 -24 -18 -12 -6 0 +6 CLIP CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 CHANNEL 1 0 4 5 CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 CHANNEL 2 0 4 5 CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 CHANNEL 3 0 4 5 CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 CHANNEL 4 0 4 5 POWER 8 5 MUTE / ON ST / 2CH 8 8 MUTE / ON ST / 2CH 8 8 MUTE / ON ST / 2CH 8 8 MUTE / ON ST / 2CH 8 HEADPHONE MIXER/AMP OFF AUX 10 MAIN 12 4 HF 12 4 0 VOLUME 10 12 4 HF 12 4 0 VOLUME 10 12 4 HF 12 4 0 VOLUME 10 12 4 HF 12 4 0 VOLUME 10 8 8 8 8 8 8 8 8 MASTER VOLUME INJECT PHONES AUX IN 12 LF 12 L AUX R PAN MAIN 12 PHONES AUX IN LF 12 L AUX R PAN MAIN 12 PHONES AUX IN LF 12 L AUX R PAN MAIN 12 PHONES AUX IN LF 12 L AUX R PAN MAIN HEADPHONE MIXER/AMP Safety Instructions Caution: To reduce the hazard of electrical shock, do not remove cover or back. No user serviceable parts inside. Please refer all servicing to qualified personnel. CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE FUSE ATTENTION UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE WARNING DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE AVIS RISQUE DE CHOC ELECTRONIQUE NE PAS OUVRIR RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture. The lightning flash with an arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the products 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. Important Safety Instructions 1. Please read all instructions before operating the unit. 2. Keep these instructions for future reference. 3. Please heed all safety warnings. 4. Follow manufacturers instructions. 5. Do not use this unit near water or moisture. 6. Clean only with a damp cloth. 7. Do not block any of the ventilation openings. Install in accordance with the manufacturers instructions. 8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9. 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 third prong is provided for your safety. When the provided plug does not fit your outlet, consult an electrician for replacement of the obsolete outlet. 10. Protect the power cord from being walked on and pinched particularly at plugs, convenience receptacles and at the point at which they exit from the unit. 11. Unplug this unit during lightning storms or when unused for long periods of time. 12. Refer all servicing to qualified personnel. Servicing is required when the unit has been damaged in any way, such as power supply cord or plug damage, or if liquid has been spilled or objects have fallen into the unit, the unit has been exposed to rain or moisture, does not operate normally, or has been dropped. Table of Contents Introduction S·phone Features Controls and Functions Front Panel Layout Rear Panel Layout Operating the S·phone Setting Up the S·phone S·phone Master section S·phone Channels Stereo and Two Channel Modes S·phone Connections Cue Mix Set-up for Multitrack Vocal Recording Cue Mix Set-up for Multitrack Rhythm section Recording Linking Multiple S·phones Headphone Impedance and Sensitivity ratings S·phone Wiring Guide Specifications Block Diagram 2 3 4-5 6-7 7 8 9 10 11 12 13 14 15-16 17 Copyright 2001, Samson Technologies Corp. Printed May, 2001 Samson Technologies Corp. 575 Underhill Blvd. P.O. Box 9031 Syosset, NY 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 516-364-3888 www.samsontech.com 1 Introduction Congratulations on purchasing the Samson S·phone Headphone Amplifier! Although this unit is designed for easy operation, we suggest you take some time out first to go through these pages so you can fully understand how we've implemented a number of unique features. The S·phone is a compact, high-quality device that allows you to monitor any stereo or monophonic source signal (balanced or unbalanced) over as many as twelve separate headphones. Providing unusually high power levels and superb audio fidelity, the S·phone is compatible with virtually all popular headphone models. Front panel controls include a Master Input Level control and Stereo/2 Channel switch. Each headphone output has its own individual HIGH & LOW Frequency EQ, an Insert jack, and Level control. Special output jacks on the rear panel allows any number of S·phone units to be linked together with no loss of signal. The S·phone can be used in a wide variety of applications, including recording studios, teaching labs, broadcast environments, and for live performance. In this manual, you'll find a more detailed description of the features of the S·phone, as well as a guided tour through the front and rear panels, step-by-step instructions for using the S·phone, a reference chart that gives impedance and sensitivity ratings for a number of popular headphone models, and full specifications. You'll also find a warranty card enclosed--please don't forget to fill it out and mail it so that you can receive online technical support and so we can send you updated information about other Samson products in the future. With proper care and adequate air circulation, your S·phone will operate trouble free for many years. We recommend you record your serial number in the space provided below for future reference. Serial number: Date of purchase: Should your unit ever require servicing, a Return Authorization number (RA) must be obtained before shipping your unit to Samson. Without this number, the unit will not be accepted. Please call Samson at 1-800-3SAMSON (1-800-372-6766) for a Return Authorization number prior to shipping your unit. Please retain the original packing materials and if possible, return the unit in the original carton and packing materials. 2 S·phone Features MASTER LEVEL dB -30 -24 -18 -12 -6 0 +6 CLIP CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 5 CHANNEL 1 0 4 5 CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 CHANNEL 2 0 4 5 CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 CHANNEL 3 0 4 5 CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 CHANNEL 4 0 4 5 POWER 8 MUTE / ON ST / 2CH 8 8 MUTE / ON ST / 2CH 8 8 MUTE / ON ST / 2CH 8 8 MUTE / ON ST / 2CH 8 HEADPHONE MIXER/AMP OFF AUX 10 MAIN 12 4 HF 12 4 0 VOLUME 10 12 4 HF 12 4 0 VOLUME 10 12 4 HF 12 4 0 VOLUME 10 12 4 HF 12 4 0 VOLUME 10 8 8 8 8 8 8 8 8 MASTER VOLUME INJECT PHONES AUX IN 12 LF 12 L AUX R PAN MAIN 12 PHONES AUX IN LF 12 L AUX R PAN MAIN 12 PHONES AUX IN LF 12 L AUX R PAN MAIN 12 PHONES AUX IN LF 12 L AUX R PAN MAIN The Samson S·phone headphone amplifier utilizes the latest technology in gain management design. Here are some of it's features: · · · · · · · · · Four channel headphone mixer amplifier. Three headphone outputs; two rear, plus one front panel output per channel. Two master stereo inputs with balance control. Dual band equalizer on each channel. 5 segment LED meter on each channel plus master. Auxiliary input, with level control, on each channel for "More Me" mixing. Stereo or dual input mode and mute switches on each channel. Maximum output power on each channel regardless of headphone impedance. Three year extended warranty. 3 Controls and Functions FRONT PANEL LAYOUT 1 2 MASTER LEVEL dB -30 -24 -18 -12 -6 0 +6 CLIP 3 CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 5 4 CHANNEL 1 0 4 5 CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 CHANNEL 2 0 4 5 C -30 -24 MUTE / ON ST / 2CH 8 8 MUTE / ON ST / 2CH 8 8 MUTE / HEADPHONE MIXER/AMP OFF AUX 10 MAIN 12 4 HF 12 4 0 VOLUME 10 12 4 HF 12 4 0 VOLUME 10 8 8 8 8 MASTER VOLUME INJECT PHONES AUX IN 12 LF 12 L AUX R PAN MAIN 12 PHONES AUX IN LF 12 L AUX R PAN MAIN PHON 9 10 11 12 13 14 15 16 17 1 MASTER LEVEL METER - Indicates the amount of signal being driven into the four channels from the master volume control. MASTER VOLUME - Controls the level being sent to the individual channels. CHANNEL LEVEL METER - Displays the amount of power being supplied to the channels. HEADPHONE CHANNEL 2 - The same knob and switch compliment as Channel 1 is duplicated for Channel 2. 5 HEADPHONE CHANNEL 3 - The same knob and switch compliment is duplicated for Channel 3. 6 HEADPHONE CHANNEL 4 - The same knob and switch compliment is duplicated for Channel 4. 7 MAIN POWER SWITCH - When turned on, activates the S·phone. 8 RACK EARS - Used for mounting into a standard 19 inch rack. 9 MASTER INJECT - Stereo TRS front panel input for injecting a signal into the main mix. 10 MUTE SWITCH - Used for muting the signal on the individual channels. 2 3 4 REAR PANEL LAYOUT A B C D E MINIMUM IMPEDANCE 8 OHMS MADE IN CHINA MINIMUM IMPEDANCE 8 OHMS MINIMUM IMPEDANCE 8 OHMS CHANNEL 4 OUTPUTS CHANNEL 3 OUTPUTS CHANNEL 2 OUTPUTS HEADPHONE MIXER/AMP A AC INLET - IEC standard AC power cable connector with external fuse. CHANNEL 4 OUTPUTS - 2 rear panel headphone outputs for Channel 4. CHANNEL 3 OUTPUTS - 2 rear panel headphone outputs for Channel 3. D CHANNEL 2 OUTPUTS - 2 rear panel headphone outputs for Channel 2. B C 4 Controls and Functions 5 CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 6 CHANNEL 3 0 4 5 CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 7 CHANNEL 4 0 4 5 8 POWER 8 MUTE / ON ST / 2CH 8 8 MUTE / ON ST / 2CH 8 E 10 12 4 HF 12 4 0 VOLUME 10 12 4 HF 12 4 0 VOLUME 10 8 8 8 8 R MAIN 12 PHONES AUX IN LF 12 L AUX R PAN MAIN 12 PHONES AUX IN LF 12 L AUX R PAN MAIN 11 HEADPHONE OUTPUT - A front panel headphone output for each channel. 12 ST/2CH SWITCH - Switches between stereo and 2 channel modes. 13 AUX IN - Used to inject a "MORE ME" signal into the individual amp channels. 14 HIGH FREQUENCY EQ - Controls the amount of high frequency EQ applied to headphone output. 15 LOW FREQUENCY EQ - Controls the amount of low frequency EQ applied to headphone output. 16 VOLUME CONTROL - Controls the volume to the headphone output for the individual channel. 17 PAN CONTROL - Controls the balance from left to right in stereo mode and from aux to main mode. E F G S MINIMUM IMPEDANCE 8 OHMS LEFT MONO CHANNEL 1 OUTPUTS LINK OUTPUT LEFT RIGHT MAIN INPUT LEFT RIGHT E CHANNEL 1 OUTPUTS - 2 rear panel headphone outputs for Channel 1. LINK OUTPUTS - Outputs that are tied to the main input for linking to another headphone amp or other device. MAIN INPUT - The main signal input to the headphone amp. Plugging into the left jack only sends the signal to both the left and right. 5 F G Operating the S·phone SETTING UP THE S·phone Setting up your S·phone Headphone Amplifier is a simple procedure, which takes only a few minutes. Remove all packing materials (save them in case of need for future service) and plug the provided AC power cord in the rear AC inlet, but don't plug the power cable into a wall outlet just yet. · Connect the output from the device you want monitored to the Left/Right MAIN INPUT jacks on the S·phone rear panel. The S·phone accepts both balanced and unbalanced signal. Generally, a balanced signal is preferable because it provides better signal-to-noise ratio and reduced extraneous noise. Set the controls to the following positions: · MASTER LEVEL dB -30 -24 -18 -12 -6 0 +6 CLIP CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 4 CHANNEL 1 0 4 5 C -30 -24 5 MUTE / ON ST / 2CH 8 8 MUTE / HEADPHONE MIXER/AMP OFF 10 12 4 HF 12 4 0 VOLUME 10 8 8 MASTER VOLUME INJECT PHONES AUX IN 12 LF 12 L AUX R PAN MAIN PHON MASTER VOLUME ­ OFF CHANNEL 1 MUTE SWITCH ­ OUT CHANNEL 1 ST/2CH SWITCH ­ OUT CHANNEL 1 HIGH FREQUENCY ­ 0 CHANNEL 1 LOW FREQUENCY ­ 0 CHANNEL 1 PAN ­ CENTER, 12:00 CHANNEL 1 VOLUME ­ O CHANNEL 2 - 4's Controls - Set the Same as Channel 1 · Turn the Master Volume knob and all four headphone Channel Output knobs to their minimum (fully counterclockwise) setting. Plug the S·phone power cable into a wall outlet and switch the unit on by pressing the power switch. Apply a signal, like the output of a mixer playing a CD, to the S·Phone's rear-panel Left/Right MAIN INPUT jacks. Raise the MASTER VOLUME until the meter reaches -18 to -12 dB. Connect a set of headphones to Channel 1 and slowly turn the channel's Volume knob clockwise until you hear the desired level. · · · WARNING: Because the S·Phone is capable of generating extremely high volume levels, always start with the Channel Volume knob at minimum and then slowly turn it up. 6 Operating the S·phone SETTING UP THE S·phone - Continued · Repeat the previous step for all Channels that have headphones connected, making sure to start the VOLUME knob completely counterclockwise and then slowly raising it until the desired level is achieved. If you have connected different models of headphones to the various Channel Headphone jacks, you may find that some require more gain than others to achieve the same volume. This kind of disparity will occur if the various headphones have different impedances. The lower the impedance, the louder the headphone will sound compared to another, higher impedance headphone at the same VOLUME setting. Another factor affecting headphone loudness is called sensitivity. This is generally measured by determining the decibel (dB) level generated by 1 mW of power input. The higher the dB rating, the louder the headphone. See the Reference chart on page 16 of this manual for more details. To achieve optimum signal-to-noise ratio, the MASTER VOLUME should generally be set as high as possible, short of audible distortion. However, if this results in your getting blasted with signal even though the channel volume is near minimum, you'll need to decrease the Master Volume while raising one or more channel volume levels. Conversely, if you find that you have to raise one or more headphone Channel Volume knobs to maximum or near maximum to achieve the desired level, try increasing the Master Volume Level while decreasing the channel volume(s). · S · Phone Master Section 1 Master Volume The S phone's MASTER VOLUME control is used to adjust the input signal connected to the MAIN Left and Right inputs. In addition, the MASTER VOLUME control adjusts the level of the signal inserted in the MASTER INJECT, which is summed with the MAIN Left and Right input signal. MASTER LEVEL dB -30 -24 -18 -12 -6 0 +6 2 CLIP 5 2 Master Level meter The S·phone's maser section includes an 8 segment LED LEVEL meter which monitors the input level of the MAIN Left and Right Inputs in Decibels (dBs) from ­30 to CLIP. If the LEVEL meter displays a CLIP signal, then turn down the signal being sent into the MAIN left and Right. HEADPHONE MIXER/AMP OFF AUX 10 MAIN 1 MASTER VOLUME INJECT 3 3 Using the Master Inject The S·phone's MASTER INJECT is a TRS input (Tip, Ring, Sleeve) that allows a second stereo signal to be inserted and summed together with the MAIN Left and Right signals. You can use a stereo signal from your mixers buss outputs or auxiliary sends to balance the mix between two stereo signals like rhythm tracks and vocals. 7 Operating the S·phone S · PHONE CHANNELS 1 Headphone Output The S·phone's Headphone Output jack accepts a standard 1/4" TRS connector for easy interface with most professional headphones. Once the MASTER VOLUME has been set, the channels output level is set by the VOLUME knob. CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 8 4 CHANNEL 1 0 4 5 -30 - MUTE / ON 2 1 ST / 2CH