Pretty Stumped, need help

[UnderFire 10+ year member]

Well, I was listening to music at very low volume this afternoon and the subwoofer just cut out and started thumping, just thumping like 3 times a second.

Every time it thumps the Protect light flashes, and the goes back to normal.

It had been installed for ~ a Month and hadn't had a single problem.

Equipment:

Pioneer DEH-1300MP

JBL Bp1200.1

DD 2512 @ 1 ohm

I Have tried the following:

The sub plays just fine when I use a rca cable with a headphone jack directly to my phone.

I tried running a different set of RCA's directly to the amp for the HU, same thing happens

I swapped the HU with a spare Clarion DB365UB, same thing, also tried the other rca's with this headunit.

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[mylows10 5,000+ posts]

check ground continuity and voltage

 

[goingdef 10+ year member]

try a different amp it sounds like it may be the culprit.

 

[AnthonyO 10+ year member]

Had this same problem with one of my old Phoenix Gold amps. Sounds like the amp is the culprit

 

[UnderFire 10+ year member]

try a different amp it sounds like it may be the culprit.

Any clue why using the direct RCA's would make it play fine?

 

[goingdef 10+ year member]

Any clue why using the direct RCA's would make it play fine?

well I was just guessing that the output of the HU is more then what a ipod would put out and that may be causing it to go into protect, but I was just guessing some problems are hard to solve when your not looking at them with the possibility's that ca offers.

 

[UnderFire 10+ year member]

check ground continuity and voltage

13.8 @ the amp, that's all I can get, don't have a DMM.

 

[mylows10 5,000+ posts]

you should get one. may just be a bad ground

 

[UnderFire 10+ year member]

you should get one. may just be a bad ground

Alright, I don't think I'll be able to get a better ground, It's ~3ft straight to the frame with 4ga. but I'll pick up a DMM and see what it is.

 

[mylows10 5,000+ posts]

always check the easy stuff first. 9/10 its wiring tho

 

[chrisw91 10+ year member]

better ground= wire ran directly to battery

 

[quackhead 10+ year member]

 

[CHEMMINS 10+ year member]

It's the deck....it is the only thing you changed in the equation.

 

[bgowdy 5,000+ posts]

uh oh sounds the "heart beat". last time i had the problem the amp sh1t......

 

[UnderFire 10+ year member]

It's the deck....it is the only thing you changed in the equation.

I changed the deck because I thought that was it being a cheap junker, but it still did it. Decided to just do my Un-install a couple weeks early since I'm going to start working on new projects.