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I have to hook up 4 amps in my car. 4 channel 700 watt ken wood, 2 channel 800 watt Sony, 4 channel 740 watt Jensen ,and a 2 channel Rockford fosgate. Which is best way to hook them up so I'm not ki

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Pace posted on Saturday, March 05, 2005 - 01:08 GMT Your subs are dual 4 ohm voice coils so if you want to bridge your 2 channel amplifier to your two subs then wire them parallel, meaning the + to + and - to - ( Do this to both subwoofers), Then run a wire from one positive and one negative on each sub and bring the two positives together and the two negatives together and hook both positives to the far positive connection on your amp and connect both negatives to the other negative on your amp,

This will create a 4 ohm load on your amp.

Although if it's a two channel and you have two subs it's usually pointless to bridge them because if you use one channel per subwoofer its going to be the same as if both subs were bridged. example) 800 watts x 1 bridged power of your amplifie (4 ohms) is the same power as 400 watts x 2 at 2 ohms.

Posted on Nov 26, 2012

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I have a old 2001 rockford fosgate 2 channel p5002 model in great condition just need to know how many watts is it and which subwoofers are compatible to this amp? thanks


Your amp is rated at 500 watts. Here is the break down of your wattage.

125x2 at 4 ohms
250x2 at 2 ohms
500x1 at bridged 4 ohms

When hooking up the amp make sure to use 4 gauge power and ground wire.

Jan 07, 2011 | Rockford Fosgate Punch P5002 Car Audio...

1 Answer

I have an sony xplod 4 channel 600 watt amp


First are they in the same box? If so and they are sharing the same air space running one amp to both is best andwill perform better. One woofer could be over powering the other and or you could have a woofer problem. A lso your wiring coul be problem. When amp is bridged it changes the OHM reading and output your other woofer may not be rated at or able to handle a lower Ohm rating also it coul blow that woofer if it hasn't already hapened . Be careful. check woofers independently for operation and check the non performing woofer on an unbridged power source or amp. Hope this helps. Write back if not.

May 06, 2010 | Rockford Fosgate P112-200 Car Subwoofer

1 Answer

What is the output of the 451s rms power


Dynamic Power Rating (measured at 14.4V):
  • Bridged Into A 4-Ohm Load: 450 watts x 1
  • Per Channel Into A 2-Ohm Load: 225 watts x 2
  • Per Channel Into A 4-Ohm Load: 115 watts x 2

Apr 14, 2010 | Rockford Fosgate Punch 401S Car Audio...

2 Answers

I installed a sony 600watt amp and it works but old rockford fosgate 200 hit harder how do i make my amp louder and evenly spread throughout my car


Hello jmanbutt99,

The old Rockford-Fosgate was probably producing the rated power. The Sony is most likely overrated. But, it's supposed to be stable on each individual channel down to 2 ohms and will deliver 65 watts RMS into that load. So to get the most from it, your best bet would be a pair of 4 ohm speakers paralleled to each channel. A relatively efficient speaker like the Kicker 07DS600's shown here should provide pretty good sound.

http://www.crutchfield.com/p_20607DS60/Kicker-07DS600.html?tp=105

These will work with as little as 6 watts RMS and can handle up to 50 watts RMS so the Sony should power them really well. They're 4 ohm so a pair in parallel will present a 2 ohm load.

Hope this helps

Oct 30, 2009 | Sony Xplod XM-554ZR Car Audio Amplifier

2 Answers

I have a Jensen A600HLX hooked up to Rockford 12 and it keeps getting hot and cutting off. I have it mounted on the top of the box. What is wrong?


MAKE SURE YOU HAVE A SOLID, STRONG GROUND CONNECTION BEFORE ANYTHING ELSE!!!!!
Make sure you are using the proper gauge wiring for your amp.


Is the amp set up in bridged mode? What is the impedance (Ohms) of the Rockford Fosgate 12? If the impedance of the speaker is different from the impedance for the amp in bridged mode, it WILL get hot and cut off. Also, if you overdrive the amp, the same will happen.

The amp is stable :
  • 75 watts RMS x 4 channels at 4 ohms
  • 100 watts RMS x 4 channels at 2 ohms
  • 200 watts RMS x 2 channels bridged at 4 ohms
  • 300 peak watts x 2 channels bridged at 4 ohms

  • Also, what model is the subwoofer? What are the specs? Is it single or dual voice coil?

    You can most likely mount a cooling fan on the amp and have it turn on using the remote sensor wire. If the amp still cuts out, you're overdriving it.

    Good luck and keep me informed!
    Ed the Whizman

    Aug 26, 2009 | Jensen A600HLX Car Audio Amplifier

    1 Answer

    Can a rf 201s amp push 4-6x9s and 4-104s door speakers


    Hello jon_jonmay,

    Wiring 4 speakers to each of 2 channels, you will need to wire them series-parallel and run them at 4 ohms. If you wire all 4 parallel, the load will be 1 ohm and the amp is only stable down to 2 ohms.

    According to your manual, the 201s will deliver 50 watts into each channel at 4 ohms . So it will be supplying about 12.5 watts per speaker which is about what you get with the average factory radio. They will work OK, but they're not going to be very loud.

    Hope this helps.

    Apr 21, 2009 | Rockford Fosgate Punch 201S Car Audio...

    1 Answer

    I have a rockford fosgate p250.2 amp hooked up to two 12' subs but the amp is not powering on... instead the protect light is on and im not sure if its because its so cold outside... please help and thank...


    Remove the load from the amplifier (subs) and the RCAs
    Retry.
    If the light stays on, there are internal problems with the amplifier, and it needs to be serviced.
    If the amplifier works normally, attach the RCA's and power on again.
    If it remains on, connect one sub, and then the other.
    Your amplifier is a 2 channel amplifier rated at
    60 Watt - 4 Ohm - 2 channel(s)
    125 Watt - 2 Ohm - 2 channel(s)
    250 Watt - 4 Ohm - 1 channel(s)
    Your amplifier is not rated for a 2 ohm mono load.
    If you have Single voicecoil subs wired in parallel, you have a 2 ohm mono load - your amplifier will eventually fail.

    Jan 16, 2009 | Rockford Fosgate Punch P2502 Car Audio...

    1 Answer

    600 watt 4 channel bridgeable mosfet power supply jensen amp


    Swap the wires from one speaker to the other to see if it is the speaker or the Amp/wires. 

    Oct 23, 2007 | Jensen A600HLX 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

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