AAM
™
1662 User Manual
Page 12 http://aa.peavey.com copyright 2000 All Rights Reserved
Gain structure is among the most important considerations when installing audio systems. With the AAM 1662, we define
proper gain structure as it relates to the inputs, the summing buses and the outputs. Understanding proper gain structure will
ensure that your new AAM 1662 mixer will operate at its maximum performance level, with minimal noise and maximum
dynamic range.
Setting up the proper gain structure on the AMM 1662 is a simple process. Since all of the summing bus sends and faders have
a 0 dB reference, the only unknown level is the source. Setting the channel’s input gain properly will provide correct gain
throughout the mixer. The following procedure will get you up and running with minimal hassle.
Since there are only two meters on the AAM 1662, you must set the gain structure using the master L/R output buses. Using
the meters in conjunction with the Master Left & Right faders will give you an accurate gauge of the correct levels.
Using a single input source (microphone or line level input) connected to a single
channel of the AAM 1662, follow these steps
to correctly adjust the AAM 1662’s gain structure:
Step 1. “Zero” the console.
Set the input fader and the master Left/Right faders to 0 dB. There is no “detent” at this position, so you will have to look care-
fully at the labels adjacent to the faders to make sure that the faders are set properly. Assign the input to the L/R output bus.
Step 2. Apply audio to the input.
Apply nominal audio level at the input. The “nominal” part is key here. The signal level coming from the source should be at
“average” or “mid” level. In other words, if it’s a microphone, it shouldn’t be a whisper, nor should it be a screaming yell!
Something approaching “normal use” is required. If this is a musical vocal then perhaps “nominal” would apply to the vocal
while singing the verse of the song, not the chorus. If the source is a line level output, such as a CD player, then nominal would
be whatever output signal that will be used most often.
Setting Input Gain (Gain Structure)
Input fader set to 0 dB
Input assigned to L/R bus
Master L/R faders set to 0 dB
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