Alesis 12R manual Phantom power

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Connections

Phantom power

Certain types of microphones (called condenser microphones) require a DC power supply from the mixer. “Phantom power” sends 48 volts of DC through the microphone cable. If any of your microphones need phantom power, turn on the [PHANTOM POWER] switch on the Multimix 12R’s back panel to connect all the XLR MIC IN jacks to the Multimix 12R’s internal 48 volt phantom power source. Since the power is applied equally to pins 2 and 3, phantom power should not affect dynamic microphones (which do not require phantom power). However, make sure that your microphone cables have no short circuits or intermittent connections to avoid damage to the system.

✪Avoid connecting or disconnecting any microphones while [PHANTOM POWER] is turned on. Make all connections with the Multimix 12R powered off. If this is not possible, make sure the channel's fader and [TRIM] are down, make the connections, then turn on the [PHANTOM POWER] switch on the back panel before bringing the fader and [TRIM] back up. Many microphones make a loud "pop" when first powered, so make sure your faders are down to avoid damaging your speakers or hearing.

Never connect the MIC jack to an UNBALANCED source or to a line- level device (such as a tape recorder or synthesizer) when phantom power is being used.

If none of your microphones need phantom power, leave the phantom power switch off

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 DrawingConventions Using this manualIntroduction Alesis Multimix 12R Microphone Preamplifier/MixerGrounding Instructions AC power InstallationUnpacking Power switch Use clean power Mounting Inputs ConnectionsCable common sense Microphone Inputs Phantom power Line-level devices synthesizers, CD players, video Phantom Power will not be Used Tape in jacks Phonograph turntables Effects via Aux Send and Aux Return How to connect effect devices and signal processorsAbout stereo effect devices Using Aux 1 as an effects send Connecting an in-line processor Connections To a stage monitor foldback system OutputsTo a stereo PA system or instrument amplifier To a mono 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 Aux Send levels Typical Fader and Control LevelsUnity gain points Trim gain rangesProper 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 Multitrack recording ApplicationsTracking/Overdubbing Mixdown Using the High and LOW EQ controls Monitoring AUX 1 in the Phones jack Troubleshooting Index TroubleshootingPage Exterior cleaning Maintenance/ServiceRefer All Servicing to Qualified Technicians Connectors SpecificationsFrequency Response Impedance LevelsNoise performance typical PowerDistortion THD+N Dimensional Drawing Block Diagram Level diagram Tape IndexWarranty / Contact Alesis Contact Information