Question about Rockford Fosgate Punch 800a2 Car Audio Amplifier

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Rockford Fosgate 800a2 To 2 SVC 2ohm subs

Ok, I have two Kicker CompVT CVT 12" subs that push 2-ohms each. I also have the Rockford Fosgate 800a2 powering them. My question is how do i wire the system to bridge the amp to two ohms and run the subs at two ohms, if this is even possible. If not, how should I wire it.

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Re: Rockford Fosgate 800a2 To 2 SVC 2ohm subs

Ok.. Bridge the two sub into 4ohm than bridge to amp.

So. this how it goes.

sub1 + -
to      | |
sub2 - +
=      4ohm

           From Sub
            -          +  
            |           |
amp (L) - + (R)- +

This will use the full potiental of RF 800a2 amp. I believe it like 1153 watts max out.

Posted on May 29, 2008

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Re: Rockford Fosgate 800a2 To 2 SVC 2ohm subs

Your subs are single 2 ohm voice coils , so your only option ,if you bridge that amp is at 4 ohms with the 2 subs running in parralel ; positive to positive , neg to neg because if you run them in series youll be @ 1 ohm and that amp is going to get real hot , itll sound good for a little while but its not recommended , hope this helps

Posted on Sep 26, 2007

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Overheating amp problem...easially fixed, i think....

depends on the sub rating.

if subs are 2 ohm rated you can ONLY get 1 or 4 ohms..
2x2=4ohm series
2/2=1ohm parallel

if subs are 4 ohm rated wire in parallel

look it up google for diagram if you need one.

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1 Answer

Sub Wiring

Hello jtkpay,

Rockford-Fosgate claims their latest V-power 1500bd is stable to 1 ohm, and I would think that your Oldschool would also be. The 2 wiring options for 3 subs with 2 ohm dvc would give you a 1.34 ohm load and a 3 ohm load. The 1.34 ohm option would mean more watts to the subs, but the amp will run hotter. The diagrams look like this:


Using just 2 of the Kickers, you can wire 3 different ways, with final impedances of 0.5 ohms, 2 ohms, or 8 ohms. You do not want the 0.5 ohm load. It's bad for the amp. You don't want the 8 ohm load. It doesn't allow the amp to produce as much power. So that leaves only the 2 ohm, with coils in series and subs in parallel. It looks like this:

Hope this helps. If it does, please rate as "FixYa".

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I have 2 kicker l7 12 dual voice coil subs.. i just friend a hifonics 1600w amp and am wondering if a kx 1200.1 kicker amp will be enough to power them they are 750w rms a piece .. can these be run at 1...

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if ya have 2 duel 2ohm speaker than you can only wire them to 2ohm and would be pushing 1200 peak and 600 rms with the kx1200, so if you have the duel 4ohm i would go with the kx1200.1 and if u have the duel 2ohm i would go with the hifoncs

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yes 2ohm should be fine for that amp no problem

But dont bridge it any lower than 2 ohms.

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