How can I tell if an amp’s channel is bad

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=57309
Printed Date: May 10, 2025 at 5:17 AM

Topic: How can I tell if an amp’s channel is bad

Posted By: jdog0411
Subject: How can I tell if an amp’s channel is bad
Date Posted: June 08, 2005 at 4:38 PM

In my continuing investigation of my front left speaker problem, I am beginning to think the front left channel on my amp is bad. I hear a whine out of that speaker, but not much else. How can I tell? Do I have to get it bench tested?

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2004 BMW 325ci.
Alpine CDA-9885
JL 300/4 and 250/1
JL XR 5.25 comps
Infinity Kappa Perfect 12

Replies:

Posted By: southside
Date Posted: June 08, 2005 at 5:55 PM

put each of the remaing 3 speakers to the channel that u think might be bad an if it cont then thats what i would think

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southsider

Posted By: shiftmx11
Date Posted: June 09, 2005 at 2:37 AM

it may be your preout on your head unit (unlikely) .but may want to try swithing a RCA from a good channel to the bad channel to rule out your head unit

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