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


So. this how it goes.

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

           From Sub
                Two
            -          +  
            |           |
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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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

  • Bradley Fritz Jun 08, 2013

    Think ya flipped that around! Parallel will bring you down to 1 ohm, series will bump you up to 4 ohm's. Run speaker A positive to Speaker B negative, then Spk A negative to Spk B positive= 4ohm's. the other way you're running 1 ohm and with that amp you'll be able to fry your eggs for breakfast on it if you don't blow it first. Think Donovan just had it mixed up.

  • Bradley Fritz Jun 08, 2013

    Tip parallel drops ohm rating. Series raises.

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look it up google for diagram if you need one.

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Wiring diagram


Are your Speakers dual or single voice coil? The best way to find a wiring diagram is look at the rockford fosgate web site. I ll give you a tip to keep in mind. when wiring the ohms of a sub when you wire it in parallel positive to positive and negative to negative on one speaker you have left it in 2 or 4 ohm configuration depending on speakers. When in a series the ohm load will change by wiring positive and negative together will give you a lower ohm the more speakers you add to the amp. Fosgate will let you see how its done

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Hello desperate2le,

Watts delivered is a function of the voltage times the current. If the amp was 100 percent efficient, it would need 33 amps at 12V for 400 watts. At 14.4V, it would only need 28 amps. Of course, amplifiers are NOT 100 percent efficient, only about 50-60 percent in many cases, but somewhat higher for monoblocks, maybe 80-90 percent. So you're looking at a fuse in the 60-80A range. In the absense of a specific fuse size from the manufacturer, I'd start the primary fuse at a 60A and if the amp blows it on power up/immediately/frequently, move up to an 80A.

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Hope this helps.

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