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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 Audio & Video

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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...

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I have a sony xplod 1000 watt amp, Worked perfect for a month, All of a sudden my subs stop working, But the power light on the amp is always still on. every great while my subs will work again, sometimes...


make sure ur running the right ohm load and if its two channel try bridging it. if already bridged unbridge another thing to check is rca wires i had the same prob with a 1000w explode 2 channel

Oct 12, 2010 | Car Audio & Video

1 Answer

Hello. I have one (1) XS-L1035 being powered by a JBL gts 180X 2/1 channel amp. The sub works fine if i power two(2) subs thru 2 channels BUT if I try to bridge the power to one sub the amp cuts out. Is it...


It sounds like the problem is with the amp. try using the other sub in bridged mode and see if it still turns it off. If it still turns off then its definitely the amp. In 2 channel mode you are using each channel at 4 ohms right? and in bridged mode to 1 speaker it should be throwing a ton of power on a 4 ohm load as well,it should work fine bro -its gotta be the amp

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I need help installing a 4 Channel Power Acoustik Amplifier to Two Pioneer Subwoofers. I hooked up the power wire to the positive battery terminal in the engine compartment. I then cut the power wire and...


You are doing right on what you described. I really like to work with a clearly described what involved in an issue.

Now we have to use a Voltmeter to check if there is power to the amplifier. If there is power to the amplifier terminal, then the problem is at the amplifier, not the connection. Let check it out:

1- Turn on your Kenwood radio, make sure to hear sound from your regular speakers.
2- Turn remote control knob to the mid level between min and max.
3- Measure the blue wire where you spliced to ground to see if you have 12V, if it is not then the problem is right there.
4- Measure the Red wire power from the Amplifier to ground ( the bolt that you connect the negative power to see if there is 12V, if not trace back to the Fuse that you inserted between the positive terminal of the battery and the wire going through the firewall to correct it.
5- If you have 12V at step 3 and 4, then you have a defect unit, return it to the manufacturer for a replacement.

Sep 06, 2009 | Car Audio & Video

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

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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 Audio & Video

1 Answer

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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

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