Print Page | Close Window

sudden line noise from pioneer deh p690ub

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=98551
Printed Date: May 12, 2024 at 2:38 AM


Topic: sudden line noise from pioneer deh p690ub

Posted By: morthane
Subject: sudden line noise from pioneer deh p690ub
Date Posted: November 02, 2007 at 10:03 AM

Setup:

1986 Honda Accord DX

Pioneer Premier DEH-P690UB

Planet Audio 6.5" in all 4 locations

In the trunk:

Memphis Audio 16-MCA3004 and 16-MCD1000

Memphis Audio 12" single coil sub in sealed box (I know, I need something else, but it's what I got right now)

Kinetics power cell

Alright, so everything was installed something like... near 2 years ago, except for the head unit, which I had installed early this year.  Everything has been sounding fine in the past, but today I'm getting HUGE line noise that fluctuates with my engine RPMs (this is alternator whine, right?).

I took a search around, and it sounds like this is something that happens with Pioneer head units - so can I instantly write this off as being a problem of the head unit?  The install and HU is under warranty for another 4 years, so it's no money or time for me.



-------------
Nigel Tufnel: What we do is, if we need that extra push over the cliff, you know what we do?
Marty DiBergi: Put it up to eleven.
Nigel Tufnel: Eleven. Exactly. One louder.

-This is Spinal Tap



Replies:

Posted By: coppellstereo
Date Posted: November 02, 2007 at 10:09 AM
disconnect the inputs (rca or high-level) from your amps and see if it goes away. This will help you to figure out if it is the HU or something with the amps.

Whichever it is, check the ground connection.

-------------




Posted By: jrod83
Date Posted: November 02, 2007 at 10:33 AM
I've heard of guys regrounding the RCA's they just solder to the outside and tap into a ground somewhere..Ive never done it personally because i use Alpine HU's, but a bunch guys at work say it works.

-------------
MECP Certified
I am the loudest and proudest member of the Fighting Aggies Class of '11 WHOOP!

SAW 'EM OFF!




Posted By: morthane
Date Posted: November 02, 2007 at 4:42 PM

Found out what it was!

The 4 channel's rear speaker RCA connector has a outer collar that is loose.  The shop that installed it used Memphis RCA wires, which are adjustable in teh sense that they can be crimped a bit to grip a terminal better.  However, the "pro" crammed the RCA wires on to the terminals instead of adjusting them, among other wonderful things I've found in the past.  Earlier in the year, I had to remove the RCAs because I had to troubleshoot my old deck (it lost all high signals on all but the front right - it was ollllllddd), and one of the terminal's sleeves got pulled off.  I was able to push it back on (it connects with prong-shaped things), no harm done, but I made sure to adjust those RCA cables.

So, I'm guessing that things are out of warranty now and I might just have to live with things - I might see if I can get the prongs bent a bit outwards for better grip.

Thanks all!



-------------
Nigel Tufnel: What we do is, if we need that extra push over the cliff, you know what we do?
Marty DiBergi: Put it up to eleven.
Nigel Tufnel: Eleven. Exactly. One louder.

-This is Spinal Tap




Posted By: i am an idiot
Date Posted: November 02, 2007 at 6:39 PM
JRod has already fixed your problem.





Print Page | Close Window