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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Anonymous

That amp should work fine with those speakers,just make sure that they(speakers)are wired for 2 ohms.at 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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1 Answer

Can i use a 300 watt amp for 2, 800 watt woofers
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2-12-inch-zb4bomd1rt4qms0dqd12kkt2-3-0.png

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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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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
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look it up google for diagram if you need one.

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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

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:

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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:

97d7e1b.gif
Hope this helps. If it does, please rate as "FixYa".

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