System pops during start up.

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=52033
Printed Date: May 21, 2025 at 3:06 AM

Topic: System pops during start up.

Posted By: mrmsudawgs
Subject: System pops during start up.
Date Posted: March 16, 2005 at 11:13 PM

I just got my system installed. When I turn the key to "on" the head unit turns on as it should. Just as soon as it does I hear a very loud "Pop" or "Thump" coming from my speakers. I've had the head unit for a month prior to getting my amp and other equipment installed and I never heard this sound before. What can cause the loud thump and how can if fix it? Is it damaging my speakers?

Help!!

Here are my specs:
Alpine CDA-9831 Head Unit
Polk Carbon C400.4 Amp
Polk Momo MM2104 10" sub
Polk Momo C570 Door Speakers (Front)
Alpine Type S Door Speakers (Rear Fill on head unit power)

Mike

Replies:

Posted By: Asmodeus
Date Posted: March 16, 2005 at 11:35 PM

I found this page of noise prevention scroll down and you will find a section on Turn On/Off Thump

Basically though as it says you would need a Turn On Delay Module... This is one from stinger and should fix your problem...

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Making the World A Louder Place

Posted By: boomer_106
Date Posted: March 16, 2005 at 11:40 PM

Here is a good post on this problem.

https://www.the12volt.com/installbay/forum_posts.asp?tid=25121&KW=turn+on+thump

Posted By: mrmsudawgs
Date Posted: March 17, 2005 at 10:54 PM

I found the problem. The installer had used the "Ignition" wire on the back of my head unit instead of the "Remote" wire. Oddly, the remote wire was labeled "REMOTE" which made it quite obvious as to which one to use. HMMMM. Anyway - all is well now and the only "thump" I here now is coming from my sub!

Thanks for all the input! You all were a great help.

In Christ!
Mike