subs lost some oomph

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=29188
Printed Date: July 13, 2025 at 7:14 AM

Topic: subs lost some oomph

Posted By: Warren Jeep
Subject: subs lost some oomph
Date Posted: March 28, 2004 at 3:37 PM

I have an alpine head unit, with the 4V sub pre out, an Xtant 1000A wired off a 1 farad cap, that's supplied and grounded by 1/0 gauge cable. The Xtant is not even a year old, and neither are my two 4 ohm dvc solo baric L7's, that are in a custom built box with the right volume. The L7's are running bridged 2 ohm. I was cruisin, running them pretty high as I always do, and have never had a problem, when the bass dropped off by about 20%. It was kind of a soft, swift drop off, and the only thing I can attribute this to is maybe the 4V pre's lost some power? The HU is about 4 years old and has endured plenty of use, but I can't figure it out. Any help would be greatly appreciated! Thanks posted_image

Replies:

Posted By: DYohn
Date Posted: March 28, 2004 at 3:42 PM

Sounds like you lost a voice coil in one of your subs.

Posted By: Warren Jeep
Date Posted: March 28, 2004 at 3:53 PM

I'm assuming the blame for that is that I like to run my subs at high power most of the time posted_image

Then, I assume that there's nothing I can do but try to get some sort of warranty work/replacement? That's what I was afraid of. I can find out if it's the voice coil if I check the impedence with a dmm, can't I? Thanks for your advice.

Posted By: Alpine Guy
Date Posted: March 28, 2004 at 4:02 PM

just hook up each voice coil individually to your amp, , if they all play then there fine.

-------------
2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

Posted By: netboy
Date Posted: March 28, 2004 at 4:18 PM

Use a DMM and check for continuity for each VC.

-------------
Memphis MC-1300
2 12" JLw6v2
Diamond audio M3 6x9
Diamond audio M3 5.25 components
Audio control Matrix
Carputer

Posted By: Warren Jeep
Date Posted: March 28, 2004 at 4:31 PM

Thanks everyone for your input. Turns out that one is shot, and the other one is clipping. Thanks for the input. posted_image

Posted By: superstreet786
Date Posted: March 28, 2004 at 7:14 PM

BTW i agree with all the opinions here if that helps lol

-------------
---- 1996 Chevy S10 ----
1 Lightning Audio S2.600.2 Amp
2 Lightning Audio 12" Subs
1 Lightning Audio 1 Farad Cap