Atlas Sound 31 Band Graphic Equalizer EQM131 User Manual

1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A.   •    TELEPHONE: (800) 876-3333   •   FAX: (800) 765-3435

©2006 ATLAS SOUND LP 

Printed in USA 

 

ATS002536 RevA 10/06 

PP 

This switch turns the EQM131 on or off. To prevent spikes or pops through the system, turn the EQ on with the 
system amplifiers off and turn the amps off before turning the EQ off.

The 31 faders have 31mm of travel along with a center detent indicating the zero position. From the center point, 
moving the fader up will boost the signal at the indicated frequency, and moving the fader down will cut the signal 
at that frequency.

This switch allow you global gain selection of the 31 30mm faders. The selection is 6dB or 12dB of fader boost or 
cut. An indicator light will illuminate indicating the selection.

This switch allows you to bypass the EQ. When in Bypass mode a red LED will illuminate. 

Note: When selecting 

between bypass and active mode a level variance will occur if the master level is not set to match the incoming 
level.

This LED will illuminate if the input level exceeds +22dBM. If this occurs, turn down the signal coming into the EQ.

The variable 12dB per octave filter operates from 10Hz to 250Hz. The Low Cut filter allows frequencies above the 
selected filter to pass through the system. 

Note: This filter affects the 30mm filters.

The variable 12dB per octave filter operates from 3kHz to 40kHz. The High Cut filter allows frequencies below the 
selected filter to pass through the system. 

Note: This filter affects the 30mm filters.

This control is the master output level control. The potentiometer has a center detent which is unity gain when the 
system is wired for balanced operation. If the system is wired for unbalanced operation, it may be necessary to 
increase the gain to +6dB.

 

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