wierd problem, please help

[jake760 10+ year member]

I'm hearing cd noise through the sub, I just installed a hifonics bxi1206d and it has a HUGE turn on thump, I'm scared its going to break my type r. then its bumping along to the noise of the cd player and it also starts to bump when I switch tracks. It is a pioneer head unit but it doesn't have any alternator whine so I don't know if the hu is the problem. Oh, the volume of the bumping doesn't change regardless of the volume setting. I've tried moving the ground of the amp. anyone know whats up because I can't figure it out.

Click to read more...

 

[blackbonnie 5,000+ posts]

might wanna re check your ground and get a good clean paint free connection.

 

[jake760 10+ year member]

I sanded it to bare metal. could it be the HU's ground? btw, it didn't do it with my other amp, which was a pioneer...

 

[blackbonnie 5,000+ posts]

if it didnt do it with your other amp, then your HU should be fine. maybe check your rca connections

 

[jake760 10+ year member]

well I went out and did the pioneer hu fix, no effect, so I unplugged the left rca from the amp when it was playing, it seemed to make it a little worse, so I plugged it back in and unplugged the right rca, and it made 2 big bumps. does that mean its the rca's?

 

[jake760 10+ year member]

Oh one more thing, the amp is bolted down to the floor right next to the ground, could that be a problem?

 

[blackbonnie 5,000+ posts]

i would say you need some ne rca's, just get some cheap ones and see what happens

 

[jake760 10+ year member]

I think so, cause when I turn it on with the rca's plugged in, thump, when i turn it on without them, no thump!

 

[blackbonnie 5,000+ posts]

yeah, just go get some new rca's

 

[fwb_1234 10+ year member]

SeanDub had a similar problem last Saturday; you might want to check out his thread.

They figured that it was the RCA's too.

He had a Pioneer HU, but an IA 20.1 on a DD9917.