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Amp for 3 Fosgate HX2 10`s

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=20730
Printed Date: July 15, 2025 at 1:15 AM


Topic: Amp for 3 Fosgate HX2 10`s

Posted By: kidtransam
Subject: Amp for 3 Fosgate HX2 10`s
Date Posted: October 29, 2003 at 5:24 PM

I have 3 DVC 4ohm subs (HX2 10in.) and i need an amp for them..i want to stay with fosgate for the amp also, but im not sure which one i need.

My question is, how do you determine which amp will work with which sub? the subs are rated at 500wRMS and 1000wPEAK....so im assuming i need 500w on each sub, right? so does that mean i need an amp that says it will produce 1500wRMS? @ 2 ohm (subs wired in series-parallel). or can you look at the peak output?

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Replies:

Posted By: aggie altima
Date Posted: October 29, 2003 at 5:53 PM
Since you have 3 DVC 4ohm hx2's, I would say look for an amp that has about 1700wRMS @ 2ohms, since if you wire the 3 subs in series/parallel, you are looking at a 2.67ohm final impedance. I believe there is a way to wire the 3 subs so that the final load is 2ohms, but the power to each speaker would be different, and one or two may recieve more than 500wRMS. Here is a diagram for series/parallel wired subs. The whole point of wiring this way is for each speaker to recieve the same amount of power. If you don't mind putting a little over 400wRMS to each speaker and you want Rockford, I would suggest the Power 1500bd or 1501bd.




Posted By: Ketel22
Date Posted: October 29, 2003 at 6:42 PM

on the subject why not just buy three mono block amps all at about 500wrms i think its a better route to follow



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Posted By: MAXST
Date Posted: October 29, 2003 at 7:12 PM

ketel's method would work if the amps in total are cheaper than the one amp. and if you run a big power line-bigger than 4 gauge- and have it goin to a distrobution block with 3 outputs and one input.

Also you might want to think about upgradeing the electrical system..aka alt and battery to be able to power those correctly.



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