Whine in stock speakers

[low00ranger 10+ year member]

We did this install in a 2003 S-10 with a basic Sony head unit. For about a month it was completely stock except the Sony head unit and didn't have any whine. I installed a set of old old old MTX Terminator 12s on a Hifonics 1606d at 2 ohms and now the system is giving a faint whine from the stock door speakers only. The whine does not increase pitch with RPMs. No bad noises from the subs. I didn't change anything on the headunit except for connecting RCAs and amp remote wire. The amp has a decent ground with paint scratched off, RCAs are somewhat cheap Scoshe, and head unit uses stock ground. I'm trying to figure out how adding a sub amp introduced noise to the stock speakers???

Click to read more...

 

[x1le 10+ year member]

I would first ditch the factory ground for the head unit and see what happens.

 

[AlterEgo99 5,000+ posts]

x2...focus on the grounds first...my whine was not volume related either and when I did the "Big 3" and changed the block to chassis ground and removed the OEM block to chassis ground...whine gone.

 

[low00ranger 10+ year member]

Well I moved the stock head unit ground to a couple different location, same whine. No better no worse. In all cases, the whine goes away when I disconnect the sub amp RCAs from the back of the head unit. They are cheapo wal-mart RCAs so I'm thinking we just need to replace them with something better.

 

[Sarthos 10+ year member]

That would be a weird problem, but its a sony so it could happen.

 

[forbidden 10+ year member]

Replace the Sony and not the rca's.....