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My amp/sub system seems to be getting a "rumbling" sound lately. I don't know how to fully describe it, but you could say it's rogue noise. You can hear it when I'm switching folders or tracks on my headunit mainly, and now recently the noise is also there during songs. Basically like the sub is getting some "signal" (waveform, whatever you want to call it?) to move, but not the actual audio signal. It sounds like distant rumbling thunder. I've had this system for about 3 years no with no problems. I double checked all the wiring and it's in good order. I dont know why this noise is coming recently. Could it be that the amp or headunit is going bad?

Headunit- Pioneer Premier DEH-670MP
Amp- Pioneer Pioneer GM-7100M 800 watts max 360RMS
Sub- Infinity Reference 1242w 12" 1000 watts max 300RMS

check all the ground...make sure RCAs are plugged , & that all the wires arnt pinched or touching metal. my van used to do that also when i had a rear battery installed & it was b/c the ground was loose.

Also make sure your ground goes to bare metal.

it sounds like a ground

evilneon02 wrote: it sounds like a ground

x3 Sounds like either a ground or bad rca's.

I had this same problem . It was the RCAs

I might have to check the RCA's then. I double checked all grounds, and they are on sanded down to bare metal paint. Is the the RCA cables that go bad, or on the headunit itself?

do u have a pioneer head unit?

yea, a Pioneer Premier DEH-670MP

Pioneer decks have a tendency to get engine whine/noise through the RCA outputs, b/c of a bad ground solder in the deck itself.

Heres a way to fix it
http://www.caraudio.com/forum/showthrea ... eer+ground

Thats a great write up. I might have to try that sometime.

danman132x wrote:I might have to check the RCA's then. I double checked all grounds, and they are on sanded down to bare metal paint. Is the the RCA cables that go bad, or on the headunit itself?

its the cables not the headunit but check both

i used to get a TON of the same noise hes describing and i can never fugure out where or why it was doing it.

i just transfered everything to my VW yesterday and those noises are gone. so im now perplexed.

given how the neon is constructed compared to the VW the only thing i can think of is the ground lines. if the radio or amp have a bad ground it will do this. ive seen groundig the outside of the RCA's can sometimes fix this or regrounding the radio or making sure the amp is grounded to the frame

Anonymous User wrote:Pioneer decks have a tendency to get engine whine/noise through the RCA outputs, b/c of a bad ground solder in the deck itself.

Heres a way to fix it
http://www.caraudio.com/forum/showthrea ... eer+ground

I just did this today, and so far it got rid of the noise. Very easy to do. Thanks