Alesis 12R manual Metering/Unity Gain method

Page 37

Operating Instructions

Metering/Unity Gain method

This method gives you more headroom than the peak method, while maintaining a low noise floor which will be well below the noise of most PA or live recording environments.

1.With the mic or line level signal flowing through the channel, set the TRIM to minimum.

2.Set the CHANNEL FADER to 0 (about 2/3 up). Set all other channel faders to minimum (off).

3.Set the MASTER fader to 0 dB (all the way up).

4.Observe the Multimix 12R's LED Meter. Adjust the [TRIM]knob until the average signal level on the meter is about 0 dB (highest green LED), or peaks do not exceed the +10 dB LED (or whatever maximum your system is designed for). If you ever see the channel's PEAK LED flash, you are within 6 dB of signal overload. Turn down the TRIM knob until the PEAK LED stops flashing.

Multimix 12R Reference Manual

27

Image 37

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 AC power InstallationUnpacking Power switch Use clean powerMounting 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 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 Phones Connections 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 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