Random bursts of BASS!

[supereikenator 10+ year member]

So I installed a tiny little system in the girlfriends car, a Kenwood X397, Zapco ST-1 300 watt amp, JLW3V2 D2 wired at 4 ohms. 8 gauge Memphis wiring kit, JBL speakers all around. All stuff is brand new, even if it's old, she tells me today that she got the **** scared out of her when the sub randomly got super loud at a point in a song that it shouldn't have. Louder than typically. Currently the Zapco is completely zeroed out with regards to gain, filters, bass boost, haven't messed with it yet. The ground is sketchy, just wanted to clarify that it could be the issue. Could that be the case? It's in a 2010 Cobalt, If that matters.

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[supereikenator 10+ year member]

For the ground, I couldn't get a seat bolt off so I just drilled, sanded, and screwed in next to it.

 

[hispls 5,000+ posts]

Sounds like RCA shorting to ground or similar short.

 

[supereikenator 10+ year member]

Sounds like RCA shorting to ground or similar short.

How would that happen? The RCAs are brand new could be flawed out of the box I guess, but they are not near the ground. Or am I missing the point? Sorry if that's the case.

 

[hispls 5,000+ posts]

How would that happen? The RCAs are brand new could be flawed out of the box I guess, but they are not near the ground. Or am I missing the point? Sorry if that's the case.

Being pinched under something when you run them under the carpet? Similarly a fault on a PCB of an amp or HU can get you the same place. Just saying that a sudden random tone burst has always been that for me.

 

[NASTY08IMPALA 5,000+ posts]

I agree with the rca ..does it do it often ? Try another set of rcas or plug ur phone into it

 

[supereikenator 10+ year member]

Being pinched under something when you run them under the carpet? Similarly a fault on a PCB of an amp or HU can get you the same place. Just saying that a sudden random tone burst has always been that for me.

I did run it under some very tight plastic trim. So I should try replacing it and maybe running it a different way?

 

[hispls 5,000+ posts]

I did run it under some very tight plastic trim. So I should try replacing it and maybe running it a different way?

Would be worth a try. I've only had issues like this from RCA getting pinched under a seat or internal fault in the head unit.

 

[Hammer Knock]

i have heard a guy, grounding the negative of the rca. and any feedback went away.

 

[supereikenator 10+ year member]

Would be worth a try. I've only had issues like this from RCA getting pinched under a seat or internal fault in the head unit.

Definitely will! Thank you so much.