Alesis 12R manual Mounting, Use clean power, Power switch

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Installation

Use clean power

The Multimix 12R's internal power supply is designed to filter out most AC line noise. However, it is still good practice to plug your sound equipment into an AC circuit that is not shared with lighting dimmers, refrigerators, air conditioning units, or other appliances that may induce noise into the power system.

Power switch

The POWER switch is located on the back panel. A power indicator is on the front panel next to the meter. Avoid turning the power switch on or off while the Multimix 12R is connected to a live amplifier.

Mounting

The Multimix 12R may be rack mounted in a standard EIA 19" rack, occupying three standard 1.75" rack spaces. Any angle of orientation is acceptable. Note that (as with most audio equipment) if it is mounted into metal rack rails, the chassis ground of all units in the rack will be connected together by the rail. In some cases this is desirable, but if hum is a problem in the system, you may need to install non- conductive rack screws and washers on the Multimix 12R or other equipment in the rack to isolate the chassis grounds from each other.

The mixer may also be used on a table top. To avoid scratching a tabletop surface, apply rubber or felt feet to the bottom of the Multimix 12R.

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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 Dimensional Drawing ApplicationsUsing this manual IntroductionAlesis 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 Outputs To a stereo PA system or instrument amplifierTo a mono system To a stage monitor foldback systemTo another mixer To a stereo tape recorderTo an Adat multitrack recorder In-line Adat recordingUsing two Multimix 12Rs for more flexibility Connections Phones Monitor OutConnections Operating Instructions Before turning the mixer on, zero out the controlsSetting input trim levels Peak LED methodMetering/Unity Gain method Typical Fader and Control Levels Unity gain pointsTrim gain ranges Aux Send levelsProper gain staging of other equipment How to Set Aux Send and Return Levels AUX System Effects Send/ReceivePage Using the meter Output distortionAvoiding noise System noise ground loops, hum, induced 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 Troubleshooting IndexPage Exterior cleaning Maintenance/ServiceRefer All Servicing to Qualified Technicians Connectors SpecificationsFrequency Response Levels ImpedanceNoise performance typical PowerDistortion THD+N Dimensional Drawing Block Diagram Level diagram Index TapeWarranty / Contact Alesis Contact Information