amp help
 

the rear speakers and the door speakers quit working in my car. i checked all the fuses under the dash and under the hood. pulled down the speakers and amps in the trunk and didnt find anything wrong. I have one wire with connstant power and one with ignition power.? Help?

is everything stock? do you have the mach 460?

poineer head unit everything else is stock. the mach 460 system. the head unit has been in for several years.

well if the head unit is powering on then it wont be a fuse, are you getting any sound at all? are the tweeters working? i would check the back of the radio at the harness make sure everythings good back there, your factory amps could have gone bad that does tend to happen on the mach systems

the tweeters are working, i was going down the road and the door and rear deck speakers quit. is it common for both factory amps to go bad at the same time.

Are the amps getting power? Have you done anything recently where a wire could have come loose or become pinched? Ground wire/wires come loose?

I'm not familiar with the Mach system, but if there are separate tweeters there should be some kind of a crossover somewhere... unless it's incorporated into the amp. Perhaps there a loose wire there or it's blown a fuse. The amps should have a fuse of thier own as well either on the amp itself or an inline fuse on the power line.

i have checked all the fuses and the amps have power. i havent done anything to the car for about 2 years. i wonder if there is fuses in the amps but the amps are clued together.

http://www.flemworld.com/Mach460/mach.html#Power Amplifier Section

All I can find about the mach system... site also has links for complete wiring diagrams, but I couldn't tell if there were aditional fuses for the amps.

From what I read the headunit sends the power/sound through the front amp, which is under the headunit. From there it is split with high low pass filter and the low frequency is sent to the rear amps and from there to the front and rear mid/woofers. Just a guess but it may be that the forward amp is malfunctioning and no longer sending the low frequency signal to the rear amps. no input to those would give you no sound in the low frequency range and thus np input to the door/rear drivers.

Factory systems also have a protection circuit, if one of the speaker wires gets pinched
and picks up any ground the amps sense this and go into protect mode and stop output.
Try unpluging different speaker plugs at the amp if they are separate, if the speaker
wires come out of one big plug then it gets a little more difficult.
If the latter, unplug and test the wires with a test light or meter to see if there is
any ground reading on the speaker wires.

Did you get things working again?

i havent got it working yet. i will check the head unit for a wiring problem. i think that is the most porable place.