wiring problem or bad head unit?
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=92457
Printed Date: May 20, 2024 at 8:05 PM
Topic: wiring problem or bad head unit?
Posted By: puttster
Subject: wiring problem or bad head unit?
Date Posted: April 02, 2007 at 8:36 PM
I got a VR3 head unit for rmy 4 channel amp. Wired it with RCA cable, 2 outputs to the front, 2 outputs to the rear (subwoofer bridged). When I played it, fronts played fine, sub played nearly nothing. So to track down the problem, I switched cables at the HU so that the subs are playing out of what used to be the fronts. Sub sounds great! Now fronts are quiet. Ok I figure it is the HU, bad rear amp.. Bring it back and get a new one. Same thing, exactly! Now, maybe both of the head units have blown the rear anps but I figure probably not, Probably I have done something wrong. But what could it be?
Replies:
Posted By: stevdart
Date Posted: April 03, 2007 at 5:57 AM
Narrow down your troubleshooting to ensure that it is not actually an RCA wire itself causing the problem.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: puttster
Date Posted: April 03, 2007 at 7:40 AM
I checked the fade last night, hoping the units got shipped faded all the way front, but no luck. Is there a better way to check the cables than what I did?
Posted By: stevdart
Date Posted: April 03, 2007 at 7:51 AM
Use just one set of wires, switch to both output / input sources, then switch to the other set of wires and do the same. Or, whatever is working great right now, switch out the wires to the other set and see if anything changes.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: ferretvw
Date Posted: April 03, 2007 at 1:34 PM
One other thing you may want to check is the actual HU settings on some headunits the rear RCAs are actually selectable between operating rear speakers or subwoofers if this is set wrong it could be causing your problem. --->Richard ------------- 2008 Scion xB
Pioneer AVIC-D3
RF 3Sixty.2 sound processor
Stock speakers (for now ;))
Posted By: puttster
Date Posted: April 03, 2007 at 8:27 PM
Thank you Richard! After reading your response I cracked open the manual and there, step 12 of the operation section. was: How to access the "Subwoofer on-off control." You have saved me a lot of surffering.... except of course for the now inevitable self-incriminations... You are a true reason for the internet to exist. Thanks, Putts
Posted By: ferretvw
Date Posted: April 03, 2007 at 11:06 PM
Any time, glad I could help.
--->Richard
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2008 Scion xB
Pioneer AVIC-D3
RF 3Sixty.2 sound processor
Stock speakers (for now ;))
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