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II. Features and Functions 

 
 

A. Front Panel Features 

 

Input Pad:

 

-10dB 
 

Preamp Section: 

Bright

: +5dB >4kHz shelving 

Treble

: +/- 13dB @ 4kHz shelving 

High Mid

: +/- 14dB @ 800Hz peaking 

Low Mid

: +/- 14dB @ 400Hz peaking 

Bass

: +/- 18dB @ 40Hz shelving 

Deep

: +6dB <100Hz shelving 

 

Effects Loop Section: 

Send

:

 Output level = -infinity to +22dBu 

Adjust the level of the 

Send

 output to get the maximum 

performance from your effects unit. 

 

Return

Sensitivity

 =

 -20dBu to +infinity 

(This range of signals can be adjusted to get the nominal output 

level at the speaker output.) Adjust this knob to optimize the signal 
level returning from the Effects Loop.  If it is turned up too high, 

you can clip the return circuitry of the AG 500.  If it is turned down 

too low you might not be able to get loud enough. 
 

Pull –20dB

:

 Boosts the level of the 

Return

 signal by 8dB. 

This allows you to use a studio effects unit (line level) or a stomp 

box (instrument level) in the Effects Loop. If the signal returning 

from the Effects Loop is too quiet, pull this knob to boost the 
Return signal. 

5. 

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