amp/subs problem
09-14-2004, 10:27 AM
#1
0 Watt CAFz'r
Thread Starter
Join Date: Aug 2004
Posts: 9
Just very recently , in the last 2 days or so I think , my amp has been cutting out by itself while I'm driving. Like after a few mins of driving the amp and subs turn off. If I restart the car they'll turn back on but then few mins later it'll do the same thing. Also I shut off my HU for a few seconds then turn it back on and they'll work again but only for a short time. My setup is just a HU , 1 amp and 2 12's. Is it my amp on its last leg or battery/alternator problem?
09-14-2004, 12:26 PM
#2
Make sure you have a solid ground and go over all other wiring...
If the amp is going into protetion when it stops working you probably either have a speaker wire that is shorting out or the tinel leads on the subs are shorting out...
take out the subs and have a peek...
If the amp is going into protetion when it stops working you probably either have a speaker wire that is shorting out or the tinel leads on the subs are shorting out...
take out the subs and have a peek...
09-14-2004, 05:25 PM
#6
2000 Watt CAFz'r
Join Date: Jan 2001
Posts: 2,026
I had something like that happen to me before - the amp would randomly shut-off, and would only come back on after powering the HU down and up again. It turned out that my remote wire was shorting out against the chassis (that's what happens when you're in high-school and you just want to get the install down so you electric tape 2 pieces of wire together). However, I didn't have an "offset" light come on. I have no idea what that light indicates, but probably something in the amp.
Here's what you can do.
- Make sure the ground is good and solid (no paint, but metal to metal)
- disconnect the remote wire
- disconnect all speakers
- disconnect all RCA's
(At this point the only thing that should be attached to the amp is the + and -).
Make a small jumper wire and go from + to remote. The amp will power up. Watch it for however long it normally takes for it to go into "offset." If it still goes into "offset" then there is something wrong with your amp. If not, slowly start reconnecting wires one by one until the problem reappears. When the problem arises again, whatever the last thing you connected was is introducing some sort of problem.
Sorry, that's the best advice I can give.
Here's what you can do.
- Make sure the ground is good and solid (no paint, but metal to metal)
- disconnect the remote wire
- disconnect all speakers
- disconnect all RCA's
(At this point the only thing that should be attached to the amp is the + and -).
Make a small jumper wire and go from + to remote. The amp will power up. Watch it for however long it normally takes for it to go into "offset." If it still goes into "offset" then there is something wrong with your amp. If not, slowly start reconnecting wires one by one until the problem reappears. When the problem arises again, whatever the last thing you connected was is introducing some sort of problem.
Sorry, that's the best advice I can give.
09-14-2004, 05:28 PM
#7
2000 Watt CAFz'r
Join Date: Jan 2001
Posts: 2,026
A few questions:
What kind of amp?
What kind of voice coils on the subs? (single, dual, quad, and impedance - 2, 4, 8, or 12 ohm)?
If it is a stereo amp bridged and you are running two 4 ohm subs the impedance could have been too low and now after prolonged use like this has blow a few transistors . . . just another thought.
What kind of amp?
What kind of voice coils on the subs? (single, dual, quad, and impedance - 2, 4, 8, or 12 ohm)?
If it is a stereo amp bridged and you are running two 4 ohm subs the impedance could have been too low and now after prolonged use like this has blow a few transistors . . . just another thought.
09-14-2004, 05:43 PM
#8
0 Watt CAFz'r
Thread Starter
Join Date: Aug 2004
Posts: 9
It's a Sony Xplod 760 amp.
http://www.caraudiomag.com/testreports/0109cae_sony/
its a 2/1 channel amp.
The subs I had were the old sony xplod ones the 800 max watt ones. Forgot the model # , but they were 4 ohms for sure. But I never bridged them I just hooked it up to their own channel.
http://www.caraudiomag.com/testreports/0109cae_sony/
its a 2/1 channel amp.
The subs I had were the old sony xplod ones the 800 max watt ones. Forgot the model # , but they were 4 ohms for sure. But I never bridged them I just hooked it up to their own channel.
09-14-2004, 07:27 PM
#9
Hey,
I had the same amp and it did the same thing. Luckily for me, I know the guys at the shop where I bought it and they sent it in under 'warranty'. There's a reason Sony "X Plod' generally has a bad car audio reputation (atleast in regards to amplifiers). You may be out of luck. I've found it's best to spend a bit more and go with a brand/company that puts a little more quality into their product(s). Good luck; I hope the problem is fixable...
I had the same amp and it did the same thing. Luckily for me, I know the guys at the shop where I bought it and they sent it in under 'warranty'. There's a reason Sony "X Plod' generally has a bad car audio reputation (atleast in regards to amplifiers). You may be out of luck. I've found it's best to spend a bit more and go with a brand/company that puts a little more quality into their product(s). Good luck; I hope the problem is fixable...
09-15-2004, 01:40 PM
#10
0 Watt CAFz'r
Thread Starter
Join Date: Aug 2004
Posts: 9
LOL you're gonna laugh but I drove around town for about an hour doing errands and **** today and not once did it cut off. I was thinking "wtf is going on now" but then I had lowered the rear seat where the amp is mounted. I put the seat back up and drove around and surely it cut off shortly. Well after hearing this you'll probably know what this means. Each time I put the seat up the remote wire comes loose and starts shorting out whenever I hit a bump on the road. Thanks for everyone's help though , I'm so glad I dont have to buy a new amp.
