Power off, Volume and Function Thump

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=71440
Printed Date: May 10, 2025 at 12:37 AM

Topic: Power off, Volume and Function Thump

Posted By: juanbogo75
Subject: Power off, Volume and Function Thump
Date Posted: January 24, 2006 at 6:55 PM

i installed a pioneer cd headunit into my 2001 galant and i noticed a thump in my speakers. i hear it when 1 of three things take place: power off, when the volume is lowered and it reaches zero, and when i change the radio function between cd and stereo. any idea what's going on? i've changed the ground 2x and i still get the thump. i thought it was my amp, but i heard it even before an amp was installed. anyone know what's up with this?

Replies:

Posted By: nstaller36695
Date Posted: January 24, 2006 at 7:11 PM

what is your amplifier hooked up to ? subs ? doors ? anyway if its hooked to subs u probably have a factory amp some where in the car probably under the pass front seat

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the best part of a job is seeing the bumper get smaller over the horizon

Posted By: juanbogo75
Date Posted: January 25, 2006 at 3:02 AM

i hooked up an amp and a box, but the thump was heard before i hooked up an amp to subs in my trunk. i heard it when i changed the head unit. all the other hook ups were still the factory installs.

Posted By: nstaller36695
Date Posted: January 25, 2006 at 3:08 AM

yea u definitely have a factory amplifier on your factory speakers check under the passenger seat b/c i had that problem in a probe that the owner swore up and down the amp had been by passed

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the best part of a job is seeing the bumper get smaller over the horizon

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