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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Re: Rockford Punch HE2 wiring question.
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.
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You can't go wrong with Rockford, in my opinion. Everything they make is well built and high quality. I personally have two Rockford p500-1bd amps hooked up to four 12 inch subs in my car and those amps make those subs slam. I have them wired down to 1 ohm and the specs say that they should be pushing 500 rms a piece at 1 ohm so that p700-1bd amp really packs a punch. Depending on what you're hooking up to that amp I would defenitely recommend it to you. - Ryan in Alaska
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.
All of the Rockford-Fosgate 2-channel bridgeables I've ever seen show using the left positive (+) and the right negative (-) for bridging. But if it's not shown right on the amp, I'd call or email RF for the correct connection. The new amps do show it.
your Volfenhag 12" subs are rated at 1200 watts they are only 600 watts rms and the Rockford punch p4004 is only 200 watts rms so the answer is yes it will work but if you get a amplifier that pushes out 500 - 600 watts rms you will love the sound from subs
there is nothing wrong with the Rockford amp it just wont pound out the bass as hard but the good news is you will never blow the subs with it
when buying amps or subs make sure to look at rms rating that is the true power they actually have ie. (sub box says 1200 watt you think powerful but if you divide it in 1/2 you actually get 600 watts rms) don't get me wrong that's a nice rating. for a sub but you will want to match that number with the amps rms rating or lower. The RMS is what makes the car pound the higher the RMS the better
hope this helps
That all depends upon whether or not the sub you are running has dual voice coils or just a single voice coil. The 800a4 is a four channel amp; thus the only way you can bridge it will be 3 channel or 2 channel. If you are running a dual voice coil sub then you can wire the amp two channel and get 400 watts x 2 @ 4 ohms. Make sure that you sub can handle this kind of power though.
Here are the specs:
4 x 100 @ 4 ohms (13.8V - <0.05% THD) 4 x 200 @ 2 ohms (13.8V - <0.10% THD) 2 x 400 @ 4 ohms bridged (13.8V - <0.10% THD) Fuse: External 60A Manufactured in 1999 - 2001
the winding on the voice coil are coated with a varnish to keep the from shorting to each other. If the sub is drivin to hard or the voice coil is not vented properly. the voice coil windings will get so hot the varnish will melt or someting get sticky. When you quit playing the sub, say overnight the varnish cools and acts like a glue and will cause the voice coil to stick to the basket of the speaker. Repair just would not be worth the money or the time. Plus when a speaker reaches thid stage. It could eaisily fall to short and burn out your amplifier.