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Unanswered Resistor Question

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=48843
Printed Date: May 04, 2024 at 3:35 AM


Topic: Unanswered Resistor Question

Posted By: eiknujrac
Subject: Unanswered Resistor Question
Date Posted: January 28, 2005 at 11:29 PM

I've searched for topics regarding resistors, and have read them all, however none of them have answered my question.

Here it goes: I have a 6 ohm DVC sub, and a 2 channel amplifier that is 2 ohm stable stereo, 4 ohm stable mono. Currently, i have the sub wired series to 12 ohms, and it's not nearly as loud as i know it can be. But If i wire it parallel, that gives me 3 ohms, which is too low for my amp to be stable at. Is there a way to wire a resistor in SERIES with the sub to INcrease the resistance? (most the topics were about lowering resistance). And if you did this, could you fool the amp into seeing 4 ohms and running stable? If so, what value resistor would i use to make the 3 ohm sub run at 4 ohms?

THANKS!




Replies:

Posted By: eiknujrac
Date Posted: January 29, 2005 at 9:31 AM

Anyone?





Posted By: DYohn
Date Posted: January 29, 2005 at 10:07 AM
Not a good idea.  Replace your sub or your amp.

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Posted By: Jay T
Date Posted: January 29, 2005 at 10:11 AM
I remember reading about this before.  Theoreticllay you could run @ 3ohm bridged.  The only time you would drop below the 4 ohm mark would be around 22hz or so.  Which you're probably not.  If you were to wire in a resistor in line. You would be sucking about 1/4 of your power just into the resistor (3 ohm sub load plus 1 ohm resistor). Depending on the size or your amp, this could be a considerable amount of power. I'd look into running at 3 ohms safely instead. Then you'd also be getting maximum potintial out of your amp.




Posted By: Jay T
Date Posted: January 29, 2005 at 10:13 AM
You could just get another sub and run two also




Posted By: audeogod
Date Posted: January 29, 2005 at 11:54 AM

The reason that this is not a good idea is that like Jay T said, the resistor will be using 1/4 of your power that you would gain by dropping to 4 ohms.  The sub would get the other 3/4 power.  Even though the sub will be getting more power than it is now in 12 ohm series, the resistor will be dissipating the other 1/4 power in the form of heat only(of course no sound output).  You would have to get a resistor that could stand at least 100 watts or more.  I can tell you for certain that you will not find this at Radio Shack.  And by the time you did locate one that could stand the power it would have to take, you will pay as much for it as you would a new subwoofer.



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audeogod

92 Chevrolet Cheyenne 1/2 ton truck
Pioneer DEH-41
Eclipse 2-way coaxial 4x6's in dash
Eclipse 3-way coaxial 6 1/2's in doors(cut to fit)
Pioneer GM-X332 amp bridged to Kicker 8" sub




Posted By: eiknujrac
Date Posted: January 29, 2005 at 2:00 PM

Thanks guys!






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