Highs cut out randomly at low volume

[Bawls 0]

What's up all,

Here's my situation that's kind of annoying. Randomly as Im driving listening to my system which consists of:

Head.: Pioneer 7800MP

Front: CDT HD-62/DRT26s/EX-560i

F.Amp: Arc Audio 2100 CXL

Subw.: Ascendant Audio 10" Assassin

S.Amp: US Amps XT-800.2

My highs will just cutout. However, they'll come back on if I turn the volume up. The arc 2100 was bought used from ebay, and im thinking that's my culprit. Not too sure.

What do you think?

[johnecon2001 82]

Randomly? Sounds like a loose connection somewhere.

[sqguy 0]

Both channels? Then I would look at front RCA really close I've had that happen, could also be RCA connector on board of amp. Unless the amp has a problem and is muting or something in input section has poor connection. Most all the time I have seen that it is a bad connection in the low level input signal someplace. If the ground goes you often get noise or hum, but not always. Also check the controls on the amp, cycle all the switches/dials and give them a wiggle while it is playing...not supposed to switch things while on with some amps. Could also have a short someplace that puts it into protect, but then it comes back out...if you can't see the lights on the amp while driving....but usually low level signal if volume makes it come back on.

I had that on a little PPI I was running a 12 with. One of the RCA was loose in the center and whatever RCA cable I used it did not connect that well. When moisture went up it would cut back to like half volume like one channel went out. I play with RCA and it gets louder again. However, when I tool the amp apart it also had some output transistors that the solders were coming off the board! I don't know if it was that too. But the RCA was loose in center, I bent it a little in there so it touches the center pin harder and then it tested good to a cable. I fixed it all but have not used it yet.

Edited December 17, 2007 by sqguyib