headunit take too much power
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=116691
Printed Date: May 11, 2025 at 7:59 AM
Topic: headunit take too much power
Posted By: sublinux
Subject: headunit take too much power
Date Posted: October 03, 2009 at 8:46 PM
Hey,
i just removed my amplifier that i used with my speakers (4).. So i hook them to my Headunit ( Sony XPLOD CDX GT220 ).. My subwoofer are 2 RF P1 powered by a Pioneer GM-D7400M ( Fuse 50A ) mono amplifier.. I upgraded the big 3 in my car ( Chevy cavalier ).. So here the deal ... Now my light are dimming badly than before and my subwoofer cut at high volume ( Voltage drop ).. Before when i doesnt have my speakers pluged on my HU all was working fine.. What is happening?
Replies:
Posted By: tommy...
Date Posted: October 03, 2009 at 9:16 PM
Well if the only thing you changed was wiring up the speakers to the headunit...Dis-connect whatever you wired up to the HU and leave the subs connected...Then turn up the volume and see if you experience the same problem...!
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M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!
Posted By: tommy...
Date Posted: October 03, 2009 at 9:18 PM
What is the voltage dropping to...? What did you do with the wires connected to the amp you dis-connected...? Is the power wire fused...?
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M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!
Posted By: sublinux
Date Posted: October 04, 2009 at 6:29 PM
Well voltage drop around 10 volts.. I removed the old wire (Before it was one gauge 4 to two gauge 4 now is just one single 4 gauge.. Ground is the same.. power wire fused at 80A...
Posted By: aznboi3644
Date Posted: October 05, 2009 at 11:07 AM
your voltage should not even drop below 12 volts with an amp that small
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Custom Enclosure Design
Posted By: sublinux
Date Posted: October 05, 2009 at 12:06 PM
I know.. i think i will replace the ground wire battery to chassi because i think its damaged..
Posted By: icearrow6
Date Posted: October 05, 2009 at 12:23 PM
did you upgrade the BIG THREE at the time you removed the amp?
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Posted By: sublinux
Date Posted: October 05, 2009 at 1:01 PM
No .. i upgraded the big three when i installed my first amp.. the pioneer
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