Studiophile LX4 System version: LX4-050504 User Guide Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 What's in the Box? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Studiophile LX4 Surround System Features . . . . . . . . . . . . . . . . . . . . . .3 Speaker Enclosure Front and Rear Panel Features . . . . . . . . . . . . . . . . .4 LX4-2.1 Subwoofer, Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 LX4-2.1 Subwoofer, Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 LX4 Satellite Speaker, Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 LX4 Satellite Speaker, Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Installation - LX4-2.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Speaker Wire Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 TRS Balanced/Unbalanced Connections . . . . . . . . . . . . . . . . . . . . . .7 Connecting to Preamp, Computer or Game Console Outputs . . .8 Installation - LX4-5.1 Expander . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Speaker Wire Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Placing the Speakers - LX4-2.1 System . . . . . . . . . . . . . . . . . . . . . . . . . .9 Placing the Speakers - LX4-5.1 Expander . . . . . . . . . . . . . . . . . . . . . . .11 Technical Support & Contact Information . . . . . . . . . . . . . . . . . . . . . . .12 Warranty Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Appendix A - Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Appendix B - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Introduction Thank you for choosing the Studiophile Series LX4-2.1 / 5.1 studio nearfield monitor speakers. M-Audio is well known for digital audio interface technology, digital converters, audio preamps and mixers. Now, born from extensive research and development, the Studiophile LX4-2.1 System and 5.1 Expander is changing the concept of studio reference monitoring in 2.1 / 5.1 systems. The LX4-2.1 System is designed with the option to add the LX4-5.1 Expander package, thereby upgrading to the LX4 Surround System, a 5.1 system for music production or playback of 5.1 music and sound tracks. This feature makes the LX4 system extremely flexible, fitting into all modern digital music production and playback applications. The LX4 Surround System was designed to overcome the size limitations of conventional studio reference monitors within the digital audio environment. The compact system delivers wide-range frequency response by employing two extraordinary drivers, both of which are magnetically shielded for desktop music production, and a unique crossover and equalization technology, licensed by M-Audio. The LX4-2.1's Subwoofer provides extended low frequency down to 40Hz, making it possible for the LX4 Surround System to use much smaller Satellite Speakers and offer both ultimate convenience for desktop production and highly accurate 40 to 20Khz frequency response range. Designed and tested by veteran audio engineers to meet your needs in the studio monitoring environment, the LX4 Surround System's goal is focused on delivering pure, original sound without any additional coloration. The LX4 Satellite monitors are self-powered from amplifiers contained in the Subwoofer enclosure, which directly accepts a line level signal from a variety of sources. For pro engineers at commercial studios to home studio owners, the Studiophile LX4 Surround System sets a new affordable standard in studio monitoring. What's in the Box? Your Studiophile LX4 box contains: · LX4 Satellite Speakers (2), (three for 5.1 Expander) · LX4 Subwoofer Speaker (2.1 System only) · Speaker Wires (2), (three for 5.1 Expander) · AC Power Cord, detachable (2.1 System only) · Actual test results of your LX4 system · This manual 2 Studiophile LX4 Surround System Features 1. Satellite Woofer - the Satellite Speaker's woofer units are 4 inches in diameter with a magnetically shielded mineral-filled polypropylene cone, hightemperature voice coil and damped closed cell foam surround. It is designed to deliver balanced mid- and low-frequency response. Polypropylene is used to react against the input signals accurately, and to deliver even minimal input precisely while minimizing distortion. 2. Satellite Tweeter - by employing a specially developed 1-inch mylar dome with magnetic shielding, the Satellite Speaker's tweeters can deliver distortion-free original sound and offer extremely natural response. It minimizes reaction time by using a uniquely shaped mylar dome for excellent delivery, and also minimizes resonance by adapting a unique internal damping technology. 3. Sub-Woofer (LX4-2.1 System) - the Sub-woofer unit is 8 inches in diameter with a specially developed curved profile pulp cone, high-temperature voice coil and damped closed cell foam surround. It is designed to deliver subwoofer sound pressure at very high efficiency with extremely low distortion. 4. Enclosure - just as other components do, the LX4 Surround System enclosures have an important role to play. In order to provide more stable performance, these enclosures employs a special high-density MDF and unique interior reinforcement designed to absorb vibration and impact generated under extreme conditions. 5. Network & Power Amplifiers - the LX4 Surround System's active equalization and crossover networks, as well as the power amplifiers housed in the 2.1 Sub-woofer are specially designed for the specific carefully-chosen woofer, tweeter and sub-woofer drivens.The network properly distributes low, mid, and high frequencies to the components in order to reduce distortion and loss of signal, thereby achieving a naturally balanced sound. In order to generate powerful, ultra-crisp sound, there are six separate power amplifiers inside the LX4-2.1 Subwoofer module. These separately drive the Sub-Woofer, Left, Right, Center and Surround Left and Right speakers in a high-end multiple-amplifier structure. The power delivered to the sub-woofer driver is 60W, while 27W each is delivered to the Satellite Speakers. 6. Expandable System - LX4-2.1System is designed with the option to add the LX4-5.1 Expander package, thereby upgrading to a 5.1 system for music production of 5.1 music and sound tracks. The feature makes the LX4 system extremely flexible, able to fit all modern digital music production and playback applications. 3 Speaker Enclosure Front and Rear Panel Features LX4-2.1 Subwoofer, Rear 1. TRS Inputs: These jacks accept 1/4" connections with either balanced or unbalanced wiring. For balanced wiring, a three-conductor TRS plug is necessary.The input wiring of a TRS connector should be as follows: TRS TIP - Signal positive (+) TRS RING - Signal negative (­) TRS SLEEVE - Signal ground (Shield) Unbalanced 1/4" wiring can be done with either a two- or three-conductor (TS or TRS) plug. A two-conductor (TS) plug automatically grounds the signal negative input, whereas a three-conductor (TRS) plug, wired unbalanced, provides the option of leaving the negative input open or grounded. We recommend that you ground the unused negative input (this can be done by wiring the ring and sleeve of the TRS plug together). There are 6 TRS Inputs, as follows: L - Left Ch. Input SL - Surround Left Ch. Input C - Center Ch. Input R - Right Ch. Input SR - Surround Right Ch. Input LFE- Low Frequency Effect Input 4 2. Sub Volume: Use the Sub Volume to set the Subwoofer output sound pressure level relative to other output channels as required. Once the subwoofer to satellite balance is achieved, use the Master Volume to control overall listening levels. 3. Power / Protect. LED: When the power switch is switched to ON, the LED will glow "Green." When the Protection circuitry of the power amplifiers has turned on because of any abnormal conditions, including overdriving the speakers into heavy clipping for too long, the LED will glow "Orange" and the output level will reduce by 12dB. 4. Master Volume: Use the Master Volume to set the output sound pressure of all channels from the LX4 system to proper level as required. 5. Speaker Outputs: (5) spring-type Speaker Output terminals for connecting (5) Channel Amplifier Outputs to all speaker channels, as follows: L: Use Speaker wire included in the LX4-2.1 package to connect the L channel amplifier output to the Left Speaker. R: Use Speaker wire included in the LX4-2.1 package to connect the R channel amplifier output to the Right Speaker. SL: Use Speaker wire included in the optional LX4-3.0 package to connect the Surround Left channel amplifier output to the Surround Left Speaker. SR: Use Speaker wire included in the optional LX4-3.0 package to connect the Surround Right channel amplifier output to the Surround Right Speaker. C: Use Speaker wire included in the optional LX4-3.0 package to connect the Center channel amplifier output to the Center Speaker. 6. Product Label: This label contains the model and serial number information. 7. Power Receptacle: Accepts a detachable 3-circuit line cord in order to apply AC power to the entire LX4 system. 8. Power Switch: This switch turns the LX4 system on and off.The "On" position is indicated by a white dot. 9. Fuse Holder: Holds the external main fuse. 10. Voltage-select Switch: Provides 2 selections, 115VAC (120VAC) and 230VAC. This switch should be set to match the "house supply" (receptacle) voltage of the country or location in which the speaker is used.The 115VAC (120VAC) setting is correct for the USA,while the 230V setting is correct for most of the UK and Europe. LX4-2.1 Subwoofer, Front The front panel of the Subwoofer houses the Subwoofer driver and Sub-Frequency Port. 5 LX4 Satellite Speaker, Rear The rear panel of each Satellite Speaker houses a single pair of spring-type speaker terminals. LX4 Satellite Speaker, Front The front panel of each LX4 Satellite Speaker houses single Woofer and Tweeter drivers. Installation - LX4-2.1 System For optimal performance of the LX4-2.1, please read the following thoroughly and carefully prior to installation. Precautions Handling: Please do not touch the speaker cones.The LX4-2.1 speaker set is packaged in the box tightly, so your attention is required when taking the monitors out of the box.To avoid possible damage to the speaker units, hold both sides of the monitor in order to pull it out of the box.The speaker cones should not be touched in order to avoid damage even after they are out of the box. Connections: Using the included Speaker Wires, connect the Left and Right Speaker inputs to the corresponding speaker terminals on the rear panel of the subwoofer. Then, connect the TRS balanced/unbalanced inputs of the LX4 subwoofer unit to the desired corresponding pre-amp, computer or game console outputs (see the following diagrams). We recommend that you use high-quality balanced or unbalanced cables for these input connections. Also, turn off the power of the LX4 and turn the volume of the LX4 down to a minimum before making the necessary connections. Correct Power Operation: Since the LX4-2.1 System contains amplifiers, it must be connected to a power outlet using the detachable AC cable provided. Before connecting power, please make sure that the Voltage-Select Switch located on the speaker's rear panel is set to the appropriate position, as described in the rear-panel features list appearing earlier in this manual. WARNING! - Use of improper Voltage-Select Switch combinations may result in hazardous conditions and/or damage to speaker components not covered by speaker warranty. 6 Speaker Wire Connections Use speaker wires included in LX5-2.1 package to connect the Left and Right Speaker output terminals, found on the Subwoofer's rear panel, to the Left and Right Speakers. TRS Balanced/Unbalanced Connections Assure that the LX4's power switch is turned to the off position and that it's Master Volume is turned all the way down. Connect the male end of a TRS balanced or TS unbalanced cable to the TRS inputs on the Sub-woofer's rear panel. 7 Connecting to Preamp, Computer or Game Console Outputs Before connecting, make sure the output device's power has been turned off. Plug the TRS balanced or TS unbalanced cable to the corresponding output connectors of a pre-amplifier, computer or game console. Installation - LX4-5.1 Expander For optimal performance of the LX4-5.1 Expander, please read the following thoroughly and carefully prior to installa ...