Setting amplifier gains is the difference between good sound and great sound in a properly set-up system. Setting amplifier gains properly is paramount to great sound. If the gains are set too low, you’re not getting the most impact from the system. If the gains are set too high, you run the risk of damaging your speakers through clipping distortion.
The Gain Control is Not a Volume Control
The first thing you should realize is that your head unit decides where your gains will be set. The head unit is what will drive the amplifier, and the idea is to match the voltage coming off the head unit to the input of the amplifier. If you misuse the gain control, you run the risk of overdriving your amplifier, and destroying your speakers.
Choosing Program Material
You’ll need a CD to send a signal to the amplifier. Ever notice how some CDs are louder than others? Studio engineers will either put some impact behind a CD, while some CDs are recorded just for selling and profit.
You’ll want to use a CD that has lots of impact (loud) so you can maximize the signal sent from the head unit to the amplifier. There are several CDs available to use, so don’t limit yourself.
Let’s Get Busy!
First things first, set your gain control all the way DOWN. Put your chosen CD in the player and turn the volume control on the head unit up until the music starts distorting, then turn it down a notch. This is typically 90-95% of maximum volume.
Next, turn the gain up SLOWLY until you hear distortion. Then back it off just a little bit. You’re all set and ready to go.
If you have more than one amplifier, do this for each amp individually. Disconnect the other amplifiers’ RCA cables until you are ready, and when one is finished, disconnect it until all your amplifier gains are set.
Author: beerman
De Car Audio Forum
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