Question about Rockford Fosgate Power 501BD Car Audio Amplifier

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Rockford Fosgate 501bd question

Would my Rockford Fosgate 501bd amp (300 x 1 @ 4 ohm, 500-600 x 1 @ 2 ohm) push two 10" Kicker CVR subwoofers? They handle 50-300 watts RMS at 2 ohm.

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Re: Rockford Fosgate 501bd question

That amp should work fine with those speakers,just make sure that they(speakers)are wired for 2 500-600watts coming from amp, you should be getting 250-300 watts per speaker,just dont crank your gain too high on the amp.

Posted on Sep 01, 2007

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Can I wire two p3 12 Rockford fosgate subs to a kicker 250.1 amp

It has two speaker terminals which allows you to wire muliple subs to the amp easier than trying to cram the wires all into one set of terminals. The two sets of terminals are wire in parallel internally on the amp, so it matters no which + or - you use on it. However, you need to remember they are already wired in parallel internally, so if you were to wire up two 2 ohm subs, the amp would see a 1 ohm load (which it's not stable at), not a 2 ohm.

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I have a rockford fosgate t1500 amplifier and two 12"kicker L5's duel voice coil. the subs are wired together as one. they worked for about half an hour. now the amp and head unit comes on but no...

This amp is rated at 200 watts when run at 4 ohm load when in bridged mode (mono).You will need to check the measurement of the load at the amp's positive and negative location where it meets the speakers. You are actually going to need to measure the load of the speakers on the amp. If it ran too low of a load, meaning less than 4 ohms, there is a good possibility that the amp overheated and damaged some internal components due to not enough resistance. Some of their amps have internal fuses that can be replaced. It may be time to visit a diagnostic shop.

Good luck!


May 04, 2011 | Rockford Fosgate Punch 201S Car Audio...

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Im looking at this rockford fosgate p700-1bd amp brand new for $300 it comes with a birth sheet it says 750 rms on a 1ohm load. i cant find any reviews about it 225 rms x 1 @ 4-Ohms 450 rms x 1 @ 2-Ohms...

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

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I had Rockford Fosgate P300-1 Amplifier installed professionally with a Kicker CVR10 10 in Subwoofer in 2010 Comaro. My problem is that it causes an odor in my car. I took it back to Mothers window tint...

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Dec 31, 2010 | Rockford Fosgate P3001 Car Audio Amplifier

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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.

Aug 06, 2009 | Car Amplifiers

1 Answer

I have a rockford fosgate 501bd amp the protect light comes on when my deck turns on even with no speakers connected

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May 03, 2009 | Rockford Fosgate Power 501BD Car Audio...

1 Answer

Rockford fosgate 800 a2 amp power?

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.

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.

Hope this helps.

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1 Answer

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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".

Apr 27, 2009 | Rockford Fosgate Power 1500BD Car Audio...

1 Answer

Help with CVR 12 (kickers) and a Power 1050 s amp (Rockford Fosgate)

Send me your email account and i will draw you a diagram and send it to you there. I will need to know if the ohms of each sub as well as the amp. I'll also need to know if the subs come with one or two voice coils.

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2 Answers

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

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

Sep 26, 2007 | Rockford Fosgate Punch 800a2 Car Audio...

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