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rockford fosgate 800a2 and subs?

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=29454
Printed Date: July 05, 2025 at 12:32 AM


Topic: rockford fosgate 800a2 and subs?

Posted By: chexmixelite
Subject: rockford fosgate 800a2 and subs?
Date Posted: April 01, 2004 at 1:54 AM

i bought 1rockford fosgate 800a2 amp,  1 farad cap, for about 140 from my fren... i was using 1 JL (dunno what kind)and 1 jbl gt122... i know its bad to have a mix subs... my jbl is down... and right now i looking for some subs that can handle my amp... my friend told me to buy 4  Rockford Fosgate RFP4212 Speaker... is that good?? and how should i connect it if i get the 4 subs...

anyone who uses this amp as well??

any suggestion... or other subs that i should check out

thanks...




Replies:

Posted By: chexmixelite
Date Posted: April 01, 2004 at 2:11 AM
whoops forgot i have a 86 astro van btw




Posted By: Clean Install
Date Posted: April 01, 2004 at 2:22 AM

I would suggest just 2 he2's....do to the fact that if they are dual 4ohm (?) your amp is only stable at 4ohms mono at 800x1 and if you were to try and wire 4 he2's 4ohm, you acheive a 2ohm load....so I would go with just 2 he2's wired in series/parrell:

2 DVC drivers with Voice Coils in Series / Parallel
Connecting the two voice coils of each driver in series (+ to -) and the drivers themselves in parallel (+ to +, etc.) will result in the following impedances:
Dual-6 Ohm Subwoofers: 6 Ohms
Dual-4 Ohm Subwoofer: 4 Ohms
Dual-2 Ohm Subwoofer: 2 Ohms
 

 posted_image

I know a guy that has this exact setup 2 he2's and a punch 800 not sure what model but its the same specs and sounds great....but I feel that there might be also other subs out the that you might like better maybe....just go to your local shop and take a listen....

 



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If we learn from each success and
each failure, then we can improve ourselves




Posted By: Ravendarat
Date Posted: April 01, 2004 at 9:13 AM
no dude, the 800a2 is 2 ohm stable.You can run 4 subs off it and you will get about 1100 watts outta the amp to the 4 subs. Thats only gonna be about 275 per sub but Im sure itll make em hammer. Just be sure that you dont set the amp up to clip and youll be fine. One of the guys at my shop has one running a set of single voice coil 8000 mtx subs and it works phenominally.




Posted By: forbidden
Date Posted: April 01, 2004 at 1:23 PM

I've used that same amp and 2 HX2 12's dvc 4 ohm and tallied a 144.9 db from a sealed box. So 4 4ohm 12's should absolutely wail, choose the subs properly, make the box properly and especially important is to ensure a good ground with as low a resistance on the ground return as possible.



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Top Secret, I can tell you but then my wife will kill me.





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