Problems

[SonicBurner]

I was using an amp ripped from a guitar amplifier, and it worked fine for weeks, then started shorting out. After I redid all the connections a little neater, it started working, then, a few weeks later, it quit working all together, and now just makes a scratchy sound but no music. . .

 

Here's how it was setup: It was plugged into a power inverter that I have, and getting the sound from a parallel connection with the two back speakers.  The output wires then branch off in two, and then go to the two subs.  I ripped a different amp and it worked, so its not the speakers.  Could it have burned out? Does anyone have any  other ideas. . .?

[0verb00st]

now you said you had the speakers wired in parallel. assuming theses a 4 ohm car audio speakers, that created a 2 ohm load. then you ran two subs off it also. if the subs were 4 ohm svc subs, then your setup was being run a 1 ohm. the guitar amp is meant to drive an 8 ohm speaker. a 1 ohm load is too much current for that amp. and it fried the amp internally. if you just wired two 4 ohm speakers in series, that would make an 8 ohm load. then your amp should run for a while (but guitar amps arent built to handle vibrations, temperatureextremes, and moisture like a car audio amp).

[SonicBurner]

Alright I don't know if anyone knows about this, but I got an amp from a friend who says he burned it out by accidentially crossing some wires he shouldn't have. (He didn't tell me which) He told me I could have it, and upon inspection, I saw a black burn- looking mark on the board between two 3400 ohm resistors. I don't think the finals are burned out, but could a fried resistor cause an amp (600 watt two channel profile) to quit working or act like a blown one? If I can fix this, that's like a 150$ amp for

2$ !

[0verb00st]

yes. people do that all the time when they run the amp at a lower impedance then recommended. you might be able to repair it, but dont get your hopes up. most of the time you cant see all the damage. good luck with it