Alesis 12R manual Phantom Power will not be Used

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Connections

Balanced +4 dBu line level sources: Professional recording and processing equipment typically provides a balanced, 3-conductor signal output that is a higher voltage (1.24 volts nominal level) than most synthesizers and stereo equipment. The Multimix 12R’s [LINE IN] jacks are designed to handle these balanced inputs.

Balanced sources often feature XLR outputs. However, they should NOT be connected to the XLR [MIC] inputs of the Multimix 12R unless absolutely necessary, because the higher gain of the MIC jacks gives you less headroom than the LINE IN jacks do (also, the source could be damaged by phantom power if it's turned on). Connect them to the [LINE IN] jacks using an XLR-to-1/4 inch phone TRS (tip-ring- sleeve) cable, as shown below:

If the proper connector cable or adapter is not available, +4 dBu line level sources may be connected to the [MIC] jacks ONLY IF

PHANTOM POWER WILL NOT BE USED!!

Connecting a line-level output to a phantom-powered XLR input on the Alesis Multimix 12R may cause damage to the external unit. Alesis cannot be responsible for any damages caused by this kind of misuse.

The nominal trim setting for a +4 dBu signal plugged into a line input is approximately 11 o'clock (12 o'clock on the stereo channels). This will give you plenty of headroom to start with.

Maximum levels: The maximum level the [MIC] jack can receive with the [TRIM] control full counter-clockwise is +12 dBu before clipping, so there’s only 8 dB of headroom if you plug a +4 dBu line source into the mic jack. The [LINE IN] jack on channels 1-8 may receive levels up to +32 dBu without clipping, a headroom advantage of 20 dB. The stereo channels may receive a +22 dBu (balanced or unbalanced) maximum input.

Multimix 12R Reference Manual

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Contents Reference Manual Page Important Safety Instructions Page Page Page Page Page CE Declaration Of Conformity Front Panel Table of Contents Applications Dimensional DrawingIntroduction Using this manualAlesis Multimix 12R Microphone Preamplifier/Mixer ConventionsGrounding Instructions Installation AC powerUnpacking Use clean power Power switchMounting Connections InputsCable common sense Microphone Inputs Phantom power Line-level devices synthesizers, CD players, video Phantom Power will not be Used Tape in jacks Phonograph turntables How to connect effect devices and signal processors Effects via Aux Send and Aux ReturnAbout stereo effect devices Using Aux 1 as an effects send Connecting an in-line processor Connections To a stereo PA system or instrument amplifier OutputsTo a mono system To a stage monitor foldback systemTo a stereo tape recorder To another mixerIn-line Adat recording To an Adat multitrack recorderUsing two Multimix 12Rs for more flexibility Connections Monitor Out PhonesConnections Before turning the mixer on, zero out the controls Operating InstructionsPeak LED method Setting input trim levelsMetering/Unity Gain method Unity gain points Typical Fader and Control LevelsTrim gain ranges Aux Send levelsProper gain staging of other equipment AUX System Effects Send/Receive How to Set Aux Send and Return LevelsPage Output distortion Using the meterSystem noise ground loops, hum, induced noise Avoiding noise① to Eliminate HUM if the Above has Failed Page Operating Instructions Applications Multitrack recordingTracking/Overdubbing Mixdown Using the High and LOW EQ controls Monitoring AUX 1 in the Phones jack Troubleshooting Index TroubleshootingPage Maintenance/Service Exterior cleaningRefer All Servicing to Qualified Technicians Specifications ConnectorsFrequency Response Impedance LevelsPower Noise performance typicalDistortion THD+N Dimensional Drawing Block Diagram Level diagram Tape IndexWarranty / Contact Alesis Contact Information
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