Alesis 12R - Manual

Important Safety Instructions CE Declaration Of Conformity See our website at: http://www.alesis.com FCC Compliance Statement This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference and (2) this devi...

Introduction Multimix 12R Reference Manual 1 T ABLE OF C ONTENTS Table of Contents ................................................................. 1 Introduction ............................................................................. 3 The Alesis Multimix 12R Microphone Preamplifier/Mixer......

Introduction Multimix 12R Reference Manual 3 I NTRODUCTION The Alesis Multimix 12R MicrophonePreamplifier/Mixer The Alesis Multimix 12R is a high-quality, rack-mountable 12-input,stereo output audio mixer. It is designed to handle eight microphones,two stereo line inputs, and to route signal to and ...

Installation Multimix 12R Reference Manual 5 I NSTALLATION Unpacking The Multimix 12R box should contain:1. The mixer itself2. A packet of literature along with this manual3. An AC power cable AC power READ ALL SAFETY WARNINGS IN THE PREVIOUS SECTION OFTHIS MANUAL TO ENSURE SAFE OPERATION OF THIS UN...

Connections Multimix 12R Reference Manual 7 C ONNECTIONS Inputs Cable common sense Make all connections to the Multimix 12R with the power turned off wherever possible. If you must connect or disconnect inputs whilepower is on, make sure the channel fader and [TRIM] are turned all theway down to avo...

Connections Multimix 12R Reference Manual 9 Phantom power Certain types of microphones (called condenser microphones) requirea DC power supply from the mixer. “Phantom power” sends 48 voltsof DC through the microphone cable. If any of your microphonesneed phantom power, turn on the [PHANTOM POWER] s...

Connections Multimix 12R Reference Manual 11 Balanced +4 dBu line level sources: Professional recording and processing equipment typically provides a balanced, 3-conductorsignal output that is a higher voltage (1.24 volts nominal level) thanmost synthesizers and stereo equipment. The Multimix 12R’s ...

Connections Multimix 12R Reference Manual 17 providing a direct output. Or, put the recorder into INPUT mode and insertthe plug all the way, connecting the input and output of each track of therecorder into each channel path of the mixer. This will allow playbackmonitoring of the recorder. See the A...

Connections Multimix 12R Reference Manual 23 Phones The [PHONES] jack on the front panel is designed for most stereoheadphones. The internal headphone amplifier outputs the maximumpower allowed by safety standards. The impedance and efficiency ofthe headphones will determine the maximum volume avail...

Operating Instructions Multimix 12R Reference Manual 25 O PERATING I NSTRUCTIONS Before turning the mixer on, "zero out'the controls To avoid surprises while you're setting up a new system, set allcontrols to their "zeroed out" positions as follows before proceeding: 1. Make all connecti...

Operating Instructions Multimix 12R Reference Manual 27 Metering/Unity Gain method This method gives you more headroom than the peak method, whilemaintaining a low noise floor which will be well below the noise ofmost PA or live recording environments. 1. With the mic or line level signal flowing th...

Operating Instructions Multimix 12R Reference Manual 29 Proper gain staging of other equipment The total noise performance of your system depends on proper gaincontrol of all the elements. A "noisy mixer" is usually a quiet mixer in asystem whose gain structure is incorrect. As a good starti...

Operating Instructions Multimix 12R Reference Manual 31 By having the correct level at every point in the send/return chain,you avoid distortion by overloading and avoid noise. The most common mistake with effect units is to have too low a level at the send or input, thencrank up the output of the p...

Operating Instructions Multimix 12R Reference Manual 33 Avoiding noise If the Multimix 12R is being run as suggested above, the noise of themixer itself will not be a significant factor in the noise level of yoursystem, since the Multimix 12R generates much less noise than thetypical source does. No...

Applications Multimix 12R Reference Manual 37 A PPLICATIONS Multitrack recording See the "Connections" chapter for information on how to connect theMultimix 12R to an ADAT or other multitrack recorder. In the most common setup, the ADAT is patched into the INSERTpoints of each channel. It re...

Applications Multimix 12R Reference Manual 39 Using the HIGH and LOW EQ controls The Multimix 12R provides standard shelving EQ controls on eachchannel. The HIGH knob range is +/- 15 dB with a shelving frequencyof 12 kHz. "Shelving" means that all frequencies above 12 kHz will beboost or cut...

Specifications Multimix 12R Reference Manual 41 T ROUBLESHOOTING Troubleshooting Index If you experience problems while operating the Multimix 12R, pleaseuse the following table to locate possible causes and solutions beforecontacting Alesis Product Support or your dealer for assistance. Symptom Cau...

Specifications Multimix 12R Reference Manual 43 Maintenance/Service Exterior cleaning Disconnect the AC cord, then use a damp cloth to clean the mixer’smetal and plastic surfaces. For heavy dirt, use a non-abrasivehousehold cleaner such as Formula 409 or Fantastik. DO NOT SPRAYTHE CLEANER DIRECTLY O...

Specifications Multimix 12R Reference Manual 45 S PECIFICATIONS All measurements taken with an Audio Precision System One. All noisemeasurements taken with trim at minimum and faders at unity gain with 22Hz to 22 kHz bandwidth unless otherwise specified. All In & Outmeasurements made on balanced...

Specifications Multimix 12R Reference Manual 47 Noise performance (typical) Measured at MAIN OUT +4 dBu jacks, unbalanced load, 22 Hz to 22 kHz, allchannels panned to center. MIC IN to INSERT OUT: -128.5 dBu Equivalent InputNoise at maximum gain Residual output noise (MASTER fader at nominal, channe...

Specifications Multimix 12R Reference Manual 49 B LOCK DIAGRAM Specifications Level diagram

Index Multimix 12R Reference Manual 51 I NDEX ADAT, 18, 22, 34, 39amplifier, 20, 31Aux 1, 17, 20AUX 2, 16, 32AUX SEND, 16, 20balanced, 12, 20 cable , 9 clipping, 13compressor, 17direct output using INSERT jack, 18 distortion, 28, 31effect, 16EQ, 31Fader, 30feedback, 20, 21gain, 30ground loop, 35 iso...

Warranty / Contact Alesis Limited Warranty ALESIS CORPORATION ("ALESIS") warrants this product to be free of defects in material and workmanship for a period of one (1) year for parts and for a period of one (1) year for labor from the date of original retail purchase. This warranty is enfor...

Alesis Contact Information Alesis Distribution, LLC Los Angeles, CA USA E-mail: [email protected] Website: http://www.alesis.com Alesis Multimix 12R Reference Manual Revision 1.0 by Brooks Bruner Copyright 2002, Alesis Distribution, LLC. All rights reserved Reproduction in whole or in part is prohi...