Control Amp

Where can I get a remote gain control for a Total Mobile Audio Amp?

I recently bought a used T.M.A. T250.1 monoblock amp. The previous owner did not include the remote gain control for that amp. I was wondering if there were any other brand remotes that I could use or a way to get just the remote from an online retailer. I tried calling JL Audio but they said they do not carry that part by itself.

Well, I'm not an expert or anything, but to me, a gain control is simply a potentiometer or rheostat inline with your source/input cabling, which dampens the signal voltage going to the amp's inputs.

In other words, you could build one yourself: you just need a suitable single-channel potentiometer (expect 3 leads on it), and some RCA cabling. Interrupt the signal line from head unit to amp with a connection to the center pin of the pot, and one side. You can use a voltmeter/multimeter to test which side will go up or down when you turn CW or CCW (you probably don't want to wire it "backwards", so bass goes down when you turn CW, but then again, maybe you do... depends on your application). Keep the inputs' grounds connected as originally (not interrupted by the pot).

Here's a crap diagram:

headunit L/mono + --------- L-pot center-pin, L-pot "left"-pin ---------- amp input +
headunit L/mono - --------------------------------------------------------------------------- amp input -

If you want to buy one, it need not be stereo, but you could use a stereo one and just use one channel (traditionally, left). Brand doesn't matter, and there are no real ratings of any significance to worry about.

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