Question about Rockford Fosgate HE2 RFP4212 Car Subwoofer

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Rockford Punch HE2 wiring question.

I have a Rockford Fosgate HE2 12 inch dual channel 4 ohm sub with 400 rms and 800 peak power. I also have a Rockford Punch 401s 1200 watt amp. The amp has stereo and bridged output options. I found a wiring diagram on Rockford's site, and I am wondering which setup is the best for my system? http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=1&woofer_imp=4
Thanks for your help!

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  • Cody Morgan Feb 06, 2009

    It outputs 400 watts at 4 ohms bridged. So which configuration should I have it set up with from the website? Now I have it set up as: the input + and - are plugged into the first jacks, and then I have another wire running to the back to the other + and - jacks on the sub. So it is just wired in parallel, would this make the power any different? This is not shown on the website though. I want the best boom for the wiring.

    Thanks for the update!

  • Cody Morgan Feb 06, 2009

    Yes, I know how to bridge the amp, I am wondering how I should wire the SUB, go to this site, it shows the two methods I am inquiring about.

    http://www.rockfordfosgate.com/rftech/wo...


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If your sub will handle it, bridging it will give you more power. The best thing to do is to find out how much power the amp puts out ( RMS ) and if it is in your power handling range bridge it. It sounds better and gives you a harder punch because of more power.

Posted on Feb 06, 2009

  • Justin Duby
    Justin Duby Feb 06, 2009

    Into the amp you need to run the + wire to one channel then the - wire to the other chanel. This will give you more power.

  • Justin Duby
    Justin Duby Feb 07, 2009

    If your amp can be 2 ohms stable do this wiring and hook them in series.



    Wiring Option #1

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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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    Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

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