amp oscillating when trunk is popped open

raidfibre · 11th August 2004, 05:03 AM

This just started happening after I put some new 6x9s in the rear of my 2-door car. In the trunk there is a 10" subwoofer hooked to a 100 watt amplifier. If I leave the amp on and pop the trunk [opens with solenoid latch] the subwoofer will start humming giving a nice loud feedback at max volume until I shut the amp off. The amp inputs are connected to the rear 6x9 lines.
I suspect what the problem is, but I would like to see if anyone else has the same idea.

Also -
I would like to know if anyone out there knows how to determine the polarity of the stock speaker wires without pulling the OEM head unit out [which may not tell me anyway]?

Thanks a lot.

theAnonymous1 · 11th August 2004, 06:35 PM

Sounds like your getting feedback from the sub resonating the 6x9's causing the signal to feedback into the amp. I've never heard of that problem with high level inputs before, but i can understand why it could happen.

raidfibre · 11th August 2004, 07:45 PM

Quote:

Originally posted by theAnonymous1
Sounds like your getting feedback from the sub resonating the 6x9's causing the signal to feedback into the amp. I've never heard of that problem with high level inputs before, but i can understand why it could happen.

You have the same idea as me. I think I'll just have to try to hook up a real remote line that will always shut off the amp with the ignition off.

95Honda · 13th August 2004, 08:57 PM

Run the input of the sub amp off the front speakers.... Ran into that problem a few times.....

11th August 2004, 05:03 AM	#1
raidfibre diyAudio Member Join Date: Jan 2003 Location: Boston, MA, USA	amp oscillating when trunk is popped open This just started happening after I put some new 6x9s in the rear of my 2-door car. In the trunk there is a 10" subwoofer hooked to a 100 watt amplifier. If I leave the amp on and pop the trunk [opens with solenoid latch] the subwoofer will start humming giving a nice loud feedback at max volume until I shut the amp off. The amp inputs are connected to the rear 6x9 lines. I suspect what the problem is, but I would like to see if anyone else has the same idea. Also - I would like to know if anyone out there knows how to determine the polarity of the stock speaker wires without pulling the OEM head unit out [which may not tell me anyway]? Thanks a lot. __________________ -- Martin K

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
82 Popped	CLS	Tubes / Valves	12	8th August 2006 06:36 AM
need a sub for ~22.5 cu ft trunk	xplod1236	Car Audio	6	31st January 2005 01:19 PM
wa i popped a tube lol	karma	Tubes / Valves	11	7th July 2004 06:50 PM
Resistor popped...need help for replacement in Yaqin amp	nubbins	Tubes / Valves	8	4th July 2004 03:19 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

11th August 2004, 06:35 PM	#2
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	Sounds like your getting feedback from the sub resonating the 6x9's causing the signal to feedback into the amp. I've never heard of that problem with high level inputs before, but i can understand why it could happen.

13th August 2004, 08:57 PM	#4
95Honda diyAudio Member Join Date: Feb 2004 Location: Germany	Run the input of the sub amp off the front speakers.... Ran into that problem a few times.....