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I have a crossfire cfa354 amp.when i try to bridge right 2 channels the green power light cuts off and subs do not work.if i keep hooked up the green light comes on but cuts out again?how do i fix this?

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You shouldnt bridge the 2 right channels, you should bridge the right and left together.

Posted on Mar 12, 2009

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I have an alpine mrv-f307 4/3/2 channel. I have it hooked up to 2 12in Kenwood subs. Right now standard 2 channel each sub having their own. I heard doing a series hook up and bridging the subs to the amp ...


Bridging an amplifier refers to combining the power of two channels to run one speaker at higher power. If it is wired correctly, your amplifier is running with 4 channels bridged into 2 speakers now.

Mar 11, 2015 | Kenwood Car Amplifiers

1 Answer

Wiring a crossfire vr602 at 4ohm


OK what you are saying now is that your speakers are dual voice coil; models? 4 Ohms per Coil? I have always used single 4 Ohm Voice ciol speakers since amps are mostly based on 4 Ohm outputs. but you can get 8 Ohm dual voice coil subs also. With 8 Ohms per coil you can get 4 Ohms if you parallel the wires. What is best for you and will get you the most stable power and still will be in the specs of that amp is to run the amp in BRIDGED MODE running each subs voice coils in series with each other then run those 2 subs in parallel to the amplifier giving it a 4 Ohm load. So, your will have two sets of wires from your amp 1 for each speaker. Then you will take a short piece of wire that will connect the + to the - of each voice coil then hook up the wires from your amp to each sub What it will be is 4 Ohms + 4 Ohms = 8 Ohms per speaker the 8 Ohms in parallel each speaker to the Bridged amp output using just the + from one channel and the - from the other will give you a total of 4 ohms and power out put of 600 Watts so that ends up being 150 watts per voice coil or 300 watts each speaker
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Apr 04, 2013 | Crossfire VR602 Car Audio Amplifier

2 Answers

How to wire a crossfire vr602 2 channel amp at 4ohm and 2ohm


I would be more worried about the amp than the speakers, those subs should handle the watts with no problem. The problem will be in the amps ability to remain working with a bridged 2 ohm load. It may not even stay on without going into protect mode with a 2 ohm load. If it does stay on then it may get really hot and shut off from the heat off of the Mosfett Transistors, or it could burn the Mosfetts from driving them too hard. Basically it's your choice, run your amp hard and gain more volume or run it with slightly less sound and have a cleaner sounding more stable amp that will stay on and have less chance of being damaged. If it's not loud enough the best thing to do is buy a different amp that better suits your needs and fits the application. In your case a 2 ohm stable Mono amp is going to be your best bet or a 4 channel amp bridged into 2 channels and run with 4 ohms on each channel. Or another exact matching amp like your 2 channel amp bridge them both and have each powering 1 of your 4 ohm subs. I used two VR mono amps to power my two 12" 4 ohm subs for a few years

Apr 03, 2013 | Crossfire VR602 Car Audio Amplifier

1 Answer

I want to hook up a crossfire bmf 12 to my 500s. It is a dual 4 ohm speaker which config will i get the most power out of the amp. Wired at 8ohm bridged or each voice coil on a channel. That amp wont run...


You are correct, the amp will not support 2 ohms bridged. your best bet would probably be to have one voice coil on each channel. You could run them in parallel on one channel. but you will be getting the same power to each sub as if you put one on each channel. If you run them at 8 ohm bridged you will be getting less than 125 wrms per voice coil because of amp inefficiency at such a high resistance. It will sound cleaner also if you have one voice coil per channel.

Mar 09, 2011 | Rockford Fosgate Punch 500S Car Audio...

3 Answers

When I bridge the BAMF 2200/2 Power Acoustik amp it cuts off


Hello munchisfun,

I'd suspect that the amp is operating into too low of an impedance and going into protection.

The 2200/2 is not rated to drive a 2ohm load when bridged (most 2-channel amps aren't) and when you connect 2 4ohm subs in parallel, the load is 2ohms. I'd run one sub from each channel.

Hope this helps.

Jul 26, 2009 | Power Acoustik BAMF2200/2 Car Amp

2 Answers

How do I fix the problem so they work again.?


A 1000 WATT AMP HAS PROBABLY GONE INTO PROTECTION MODE BECAUSE YOU ARE TRYING TO RUN 1600 WATT SUBS COMBINED

Jun 08, 2009 | Car Amplifiers

1 Answer

Car system


if you have dual voice coils connect on each seporate sub negative left channel to possative right channel of the subwoofer same to other sub then conect the left possative and the right neggative to your box power terminal same to other sub then conect the two sub outs on your box left speaker positive to your positive left channel bridge then conect left speaker negative to the right speaker possative then connect your right speaker negative to your right channel negative brigdeg to your amp is single coil hook the box its self up the same way to your amp i have two dual voice cooil 12" hooked up to the same amp that way and it rocks without the power protecter turning on

Nov 09, 2008 | Pyle PLA2200 Car Audio Amplifier

1 Answer

I bought a 500/1 jl audio amp and also a w7 10 sub


if its cutting off and right back on then check your ground and your power wire makes sure both are connected good and none of your fuse's are blown, either that or you got a wire hooked up backwards in the sub.. but my guess is that the sub is hooked up wrong... that sub should be hooked up in a series or in parallel,

ok if your running just one speaker, it should be hooked up like this and 2 speakers are a different way...

this is parallel :pos to pos , neg to neg, then one wire coming from pos on sub to pos on amp then neg on sub to neg on amp but bridge the amp on your amp should be 2 pos and 2 neg in two different channels take the pos off the sub into the pos on 1 channel and then the neg from sub to the neg on the other channel,

this is series : on the sub it will go pos to neg then the other neg and pos will go to the amp, but make sure the pos and neg r on different sides of the sub, dont hook them both to the same coil

if your need more help give me your email and ill send you a pic of how to do it...


Aug 12, 2008 | Jl Audio 500/1 Car Audio Amplifier

2 Answers

Protection light


You cannot parallel two subs AND run them on the Bridge. You must have at LEAST a 4 ohm load on the bridge, and 2 4 ohm subs in parallel equals TWO OHMS. BAD!!! Move each sub to it's own channel or your amp will soon fry.

Sep 10, 2007 | Sony XM-2002GTR Car Audio Amplifier

1 Answer

Pioneer amp and sub problems


That's a 4-channel amp, not a 2-channel, which makes me wonder exactly how you have it hooked up to your sub. Is the LED light on the amp coming on? How many subs do you have hooked up to it, and how is it wired?

Mar 04, 2007 | Pioneer GM-6200F Car Audio Amplifier

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