USA-150 high pich squeel/alarm?
 

I have 3 of these amps. 2 are a bit older and dont have the built in x-over.

One day one of them started producing a high pitch sound. its not super loud, if i turn the volume up a bit i can ignore it, but it is very annoying.

The amplifier "appears" to work perfectly fine, i have it on a set of rockford components and they sound great.

Just curious to know if there is a reason this is occuring and can i make it stop?

-Nathan

Not sure if any amp has some sort of warning system, I doubt it, what you describe sounds like a capacitor that is starting to go. Capacitor swelling, and not long before getting fried, can make a high pitch sound.

Tim

hmm. well im embarased to say that the amp has been with this for quite some time, like maybe even a year. i jsut never did anything about it. I wouldn't say i max out the output on the amp, but i don't run it quiet either. So i wouldn't have thought it was a capacitor gradually failing, but i dont know enough about it to say its not...

I'll give ya $20 and a green yoyo for it :D

Hey 1daiwa1

As mentioned a cap may be the culprit, but normally the things that 'squeal' in an amplifier topology are the coils. Take the back off the amp and carefully listen for the problematic component (system on, no volume). It may be as simple as a re-solder. You also may want to look at the loads and speaker wires for proper tolerances or shorts.

Hope this helps!

Cheers
Rino