how to get 400w x 2
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=83117
Printed Date: May 02, 2024 at 12:53 AM
Topic: how to get 400w x 2
Posted By: blackonblackgsx
Subject: how to get 400w x 2
Date Posted: September 19, 2006 at 9:05 PM
hello havent been here for a while but anyways, i bought this old school fosgate amp and i want to know how to wire some subs to get 400 watts at 2 ohms? I know its easy but for some reason my brain isnt working right now, also what subs do i buy? 2 ohm 4 ohm? i used the wiring wizard or whatever its called but that gives you scenarios for a 1 ch amp i think, what i want is to get 400w from each of the channels. I kinda think i have to buy two 4ohm subs but not sure, and dont know how to wire them, im pretty sure once someone tells me how to get the 400w ill feel like a pet monkey for not remembering thanx guys again!!!!!!!!!!!!!!!!!!!btw amp is a 800@2
Replies:
Posted By: jeffchilcott
Date Posted: September 19, 2006 at 9:38 PM
Your best bet for that amp would be to get single 4 ohm drivers if you are using 2 or dual 2 ohm coils if you find some like that
(2) single VC 4 ohm can make 2 ohm
(2) DVC 2 ohm can make 2 ohm
there are other one sub configurations but you said sub(s) a few times so I assume 2
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Posted By: blackonblackgsx
Date Posted: September 19, 2006 at 11:34 PM
yes, im sorry im going to use 2 subwoofers, so i can buy (2) 2 ohm dvc subs and wire them in option 1 in the wiring configuration (series/parallel) voice coils series, speakers in parallel ? i was thinking this was the right configuration just wasnt sure.
Posted By: bellsracer
Date Posted: September 20, 2006 at 12:02 AM
I'm a bit on the confused side. Are you putting the subs on the same channel or different channels?
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Posted By: forbidden
Date Posted: September 20, 2006 at 7:36 PM
Hold up here. If you have a older Rockford 800a2 amp, then it is going to be closer to 1000w rms when bridged mono. It is stable to 4 ohm mono only. Run the amp in mono. Use a pair of dvc 4 ohm subs wired like this. The power will be evenly shared by the two subs. Option 2 (series/parallel) = 4 ohm load
Voice coils wired in series, speakers wired in parallel
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono |  |
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Posted By: bellsracer
Date Posted: September 20, 2006 at 7:51 PM
blackonblackgsx wrote:
!snip! i used the wiring wizard or whatever its called but that gives you scenarios for a 1 ch amp i think, what i want is to get 400w from each of the channels. ~snip!
This where where we got confused. >.< ------------- Never send your ducks to eagle school.
The difference between ordinary and extraordinary is that little extra.
The 3Ls of life: Learn from the Past, Live for the Present, Look to the Future.
Posted By: blackonblackgsx
Date Posted: September 21, 2006 at 12:22 AM
okay so if i understand correctly i am going to run the amp mono and wire the speakers in parallel, so left channel (+) and right channel (-) to get mono on a 800@2 correct? thank you guys for all your help! 
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