Amp Shuts off or blows fuses

Oddy88 · 27th July 2007, 05:03 AM

i have a 1000w 2 channel diesel audio amp powering two 1000w sony xploid subs in a box pulling about 13.5 average on capacitor and with it turned up to around 14-20 which is reasonably loud, the amp will get hot and just shut off then u gotta pop the head unit out real quick and push it back in, and sometimes it will come back on...i dont know if it shuts down because of heat or something else,one thing im not sure about is the amp and capacitator are sharing the same exact ground location,im not sure if thats ok or not...also the fuse block off the battery isnt fastened down to where it will stay put all the time,btw stock car speakers and pioneer head unit which has to be set on like -3 on bass settings...on the side of the amp theres bass boost, lpf and a few other setting i know nothing about...thanks for any help

Perry Babin · 28th July 2007, 03:55 AM

Do you have the speakers wired so that they present an acceptable ohm load to the amp?

farriswheel · 28th July 2007, 05:03 AM

they might need to be wired in series.

Dan2 · 30th July 2007, 07:48 AM

does the amp only shut off when you play it loud?? also have you connected it in bridge mode? U also have to sort out the battery connection - if its not connected well then that could also cause problems.

Oddy88 · 30th July 2007, 10:32 PM

yea only when its loud it shuts off,or basically when the bass starts hitting hard...see i was wandering if it could be that the amp ground wire and the battery capacitor ground wire are both grounded together on top eachother,and its a small bolt hodling it in...so i figure if maybe i separate the ground and use washers to cover the whole loop connectors...

Dan2 · 2nd August 2007, 06:47 AM

Well a better connection can only improve the situation, so do it anyway. the next thing to check is your speaker wiring. each sub should be connected to its own channel (left channel to one sub, right channel to the other one). You can check this by setting the balance to one side - then only 1 sub should be running. If the amp is connected in bridge mode, both channels of the amp will be used together, effectively making it a single channel and both subs will be connected together. Bridge mode is supposed to be used when you only have one sub, so in your case it won't work too well.

I Am An Idiot · 2nd August 2007, 08:33 PM

Quote:

Originally posted by Perry Babin
Do you have the speakers wired so that they present an acceptable ohm load to the amp?

27th July 2007, 05:03 AM	#1
Oddy88 diyAudio Member Join Date: Jul 2007	Amp Shuts off or blows fuses i have a 1000w 2 channel diesel audio amp powering two 1000w sony xploid subs in a box pulling about 13.5 average on capacitor and with it turned up to around 14-20 which is reasonably loud, the amp will get hot and just shut off then u gotta pop the head unit out real quick and push it back in, and sometimes it will come back on...i dont know if it shuts down because of heat or something else,one thing im not sure about is the amp and capacitator are sharing the same exact ground location,im not sure if thats ok or not...also the fuse block off the battery isnt fastened down to where it will stay put all the time,btw stock car speakers and pioneer head unit which has to be set on like -3 on bass settings...on the side of the amp theres bass boost, lpf and a few other setting i know nothing about...thanks for any help

28th July 2007, 03:55 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Do you have the speakers wired so that they present an acceptable ohm load to the amp? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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28th July 2007, 05:03 AM	#3
farriswheel diyAudio Member Join Date: Jul 2007	they might need to be wired in series.

30th July 2007, 07:48 AM	#4
Dan2 diyAudio Member Join Date: Sep 2005	does the amp only shut off when you play it loud?? also have you connected it in bridge mode? U also have to sort out the battery connection - if its not connected well then that could also cause problems.

30th July 2007, 10:32 PM	#5
Oddy88 diyAudio Member Join Date: Jul 2007	yea only when its loud it shuts off,or basically when the bass starts hitting hard...see i was wandering if it could be that the amp ground wire and the battery capacitor ground wire are both grounded together on top eachother,and its a small bolt hodling it in...so i figure if maybe i separate the ground and use washers to cover the whole loop connectors...

2nd August 2007, 06:47 AM	#6
Dan2 diyAudio Member Join Date: Sep 2005	Well a better connection can only improve the situation, so do it anyway. the next thing to check is your speaker wiring. each sub should be connected to its own channel (left channel to one sub, right channel to the other one). You can check this by setting the balance to one side - then only 1 sub should be running. If the amp is connected in bridge mode, both channels of the amp will be used together, effectively making it a single channel and both subs will be connected together. Bridge mode is supposed to be used when you only have one sub, so in your case it won't work too well.

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