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Power off, Volume and Function Thump


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juanbogo75 
Member - Posts: 4
Member spacespace
Joined: January 24, 2006
Posted: January 24, 2006 at 6:55 PM / IP Logged  

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?

nstaller36695 
Copper - Posts: 106
Copper spacespace
Joined: January 20, 2006
Location: United States
Posted: January 24, 2006 at 7:11 PM / IP Logged  

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

the best part of a job is seeing the bumper get smaller over the horizon
juanbogo75 
Member - Posts: 4
Member spacespace
Joined: January 24, 2006
Posted: January 25, 2006 at 3:02 AM / IP Logged  
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.
nstaller36695 
Copper - Posts: 106
Copper spacespace
Joined: January 20, 2006
Location: United States
Posted: January 25, 2006 at 3:08 AM / IP Logged  
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
the best part of a job is seeing the bumper get smaller over the horizon

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