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Speaker outputs blown on 4 channel amp

I have a Kenwood 4 channel 400 watts amp that I run to the interior speakers. It was running fine until recently the amp cut off and there's no sound coming thru it. The power light comes on, and there is a buzzing noise from one channel but the rest there's no output. How would I fix this amp? If I get it fixed by someone, how much am I looking to spend?

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Re: Speaker outputs blown on 4 channel amp

The outputs should be replaced in pairs, there are 2 to 4 pairs, but you sould only need 1 pair replaced. these transistors typically range between 10 to 30 cdn each + labour, look for 1 to 1.5h to replace & test the unit after repair. check your local repair shop for their rates. good luck

Posted on Nov 30, 2006

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I'm running 8 gauge wire for battery cable and ground a momentum 600 watt...2 channel. fuse is blowing every time I hook up either cable...

First of all, what size fuse? Check the amp and see what max amperage is, and insure your fuse is that size. Secondly, I suspect either a blown speaker or blown outputs. Disconnect the speakers from the amp and see if the fuse still blows. If it does, either you are hooking two wires up improperly, or your outputs are toast.

Aug 06, 2016 | Car Amplifiers

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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

Apr 04, 2013 | Crossfire VR602 Car Audio Amplifier

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300W Pyramid PA305 protection light

What is the speaker load in Ohms that you are running? Or what exactly is hooked up to it? are you bridging it? The protection light will come on if the load is too much for the amp to handel. If the load (in Ohms) is less than the rated load that it can run, it will stop the output to keep the amp from self destructing. The amp will sense that the demand for power will be too high for the amps circuitry which will either make the amp get so hot that it will burn up the copper on the board or more likely burn up the power mosfetts that power the speakers. If the Ohms are within range then it will allow power to flow through the circuit until the rails that the mosfetts are bound to until they get so hot that it will go into thermal protection. So if your amp has both thermal and overload protection lights and the overload is light then the load is probably too much for the amp. if it's bridged in mono the you can only have 1 speaker setup hooked up it if it's a 2 channel amp. a 4 channel amp bridged in mono for both front and rear channels will be able to have 2 speakers rated a 4 ohms each hooked up to the amp 1 set per bridged output or channel.
Try it running in stereo with only 1 speaker per channel and see if it will produce sound. If not then you have an amp that has internal problems and will need to be serviced. Check your warranty to see if you are covered.

Apr 02, 2013 | Pyramid PA305 150 Watt PA Amplifier Car...

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How much is this mrv t320 amp and is it good for a 12 p3 rockfordfosgate?

If the Alpine is run bridged at a 4 ohm impedance then yes this would be fine. The amp is 400 Watts x 1 at 4 ohms. The P3 ha a 500 Watt rms rating. Just verify the impedance of your speaker. If you have a DVC 4 ohm speaker if wired in parallel you would present a 2 ohm impedance to the amp, that is bad. What is the impedance of your speaker?

Dec 24, 2009 | Alpine MRV-T320 Car Audio Amplifier

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Power Protection Light Will Not Switch Back to Green

Disconnect all speakers, then turn the amp on. If there is no internal problem with the amp, it will go green. If it does go green, reconnect your speakers one at a time with the amp off then turn it on. when you connect the speaker that's causing the problem, the amp will go into protection. At this point, it's one of two things, a bad speaker wire (screw thru it or touching another terminal) or a bad speaker(burnt voice coil) to test that wire, disconnect the wire at the speaker and turn on the amp, if it's still green, all's well in the wire department. Meter the speaker with a multimeter on resistance, if it's blown the meter will read 1.... If you don't have a meter, connect the speaker that's having the problem to the other channel and test again, if it goes into protection, you've got your answer. Bad speaker. Hope this helps

Apr 14, 2009 | Sony Xplod XM-554ZR Car Audio Amplifier

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How do i bridge 3 subs to a 4 channel amp

My information shows the XM-1652Z as being a 2-channel amp. It will not be stable below 4-ohms in bridged mode. For best power, your subs will need to be 2-ohms with all 3 wired in series. This will present a 6-ohm load to the amp. After wiring the subs in series, connect the positive speaker wire to one channel (+) and the negative speaker wire to the other channel (-). For the 1652Z no other wiring is necessary. For subs you will also want to set the LPF (80Hz) switch to the "ON" position (to the right).

Keep in mind that the rated output is only 400 watts RMS at 4-ohms in bridged mode. That's kinda wimpy for 3 subs. You would probably obtain better results from two 2-ohm subs, each connected to a separate channel. That way each sub would be getting 200 watts RMS, still low but there's lots of good subs that will sound pretty loud with 150-200 watts

Mar 25, 2009 | Sony Xplod XM-1652Z Car Audio Amplifier

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Do you have instructions for wiring install on volfenhag GX8200??

Amplifier Class AB
Number of Channels 2
RMS Power (4 ohms) 120 watts x 2 channels
RMS Power (2 ohms) 200 watts x 2 channels
RMS Power (1 ohm) Not Stable
Bridged RMS Power 400 watts x 1 channel
Total RMS Power Output 400 watts
Peak Power Output 1000 watts watts x 1 channel
Minimum Impedance Unbridged 2 ohms
Minimum Impedance Bridged 4 ohms
THD at Rated RMS Power 0.1%
Speaker Level Inputs No
Preamp Outputs 1 pair
Built-in Crossover High-pass (HP), Low-pass (LP), Full (AP)
High-Pass Crossover Frequency 40 - 250 Hz
Low-Pass Crossover Frequency 40 - 250 Hz
Subsonic Filter N/A
Signal-to-Noise Ratio N/A
Channel Separation N/A
Bass Boost 0 - 18 dB
Bass/Gain Remote Yes
Fan Cooled Yes
Fuse Rating 20A x 2

Dec 24, 2008 | Volfenhag ZX-8200 Car Audio Amplifier

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Mac audio mac attack 600, 6 channel amp / subwoofer filter

Hi dougal,
The power cable size depends on how many watts the amp is rated at (realistic) RMS with all channels driven at 20 to 20K.
Buy the largest cable you can afford as you never know when you may add another amp,
Though with 6 channels it should handle almost any reasonable sound system configuration, such as, front, rear fill and the sub/s.
400 watts and less will do fine on 8 gauge wire. 500 watts or more should be using 4 gauge, with a distribution block. The ground should be the same size as the power wire, and solidly connected to BARE metal,
keep it as short as practical.
Use good quality terminal connectors throughout.

The (HI) inputs simply means, using the speaker output from the head unit, as opposed to the RCA connectors.When purchasing the RCA cables don't be fooled by all the fancy high dollar one's, unless cosmetics are important to you.
$5.00 cables will sound just as good as the $25.00 ones. ( The marketing dept. hates that truth. )

You can bridge any two channels as long as they are the matching right and left pair.
Look at the amp, usually the rears are the most powerful and have a low frequency crossover.
The woofer impedance and whether it is single or dual voice coil will determine the speaker wiring.

If the woofer is a single voice coil, 4 ohms...
The positive terminal on the speaker goes to left positive, on the amps left channel terminal. The negative speaker terminal goes to the right channel negative on the amp.

If the woofer has two 4 Ohm voice coils,
Parallel the terminals on the speaker.
Pos. to Pos. and Neg. to Neg. and then wire as explained above it will present a 2 Ohm load to the amplifier, any good amp can handle that. If in doubt check the specs.
I hope i was of some help.
Regards, S.

Jun 19, 2008 | Car Amplifiers

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Hi Trim God,


I do not reccommend that you push the Pioneer speakers over 100 watts.  The jenson will already drown the car with bass through your pioneers so much you will want to turn off the bass boost when playing some low bass hip hop songs. It changes from one venue of song to another, so I just keep the jenson bass boost off and use my head unit to adjsut the sound to fit my listening prefences. I am telling you man, you will be blown away .  Hook up the pioneers straight to the Channels,. do not bridge.  I put Subs in my truck though.  I used the Pass output to send the audio to me Jenson 2 Channel 600W amp. I drive one 10 inch enclosed JBL Class A/B Sub. I bridged the output of the 600 W amp to the 10 inch sub  in my Z28.  The pioneers never get drowned out.  I did smoke my 2 channel Amp one time. and also took out a MTD 10inch sub. I am talk shooting flames and smoked the whole car up. I think if you bride the XA4150 to the pioneers, you will have the flaming smoke problem in no time.  

Oct 02, 2007 | Jensen XA4150 Car Audio Amplifier

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My Kenwood 800watt amplifier

Sounds like you have overloaded your amp. When you bridge you MUST make sure that you still have the proper speaker load. One 4 ohm speaker on one channel is fine, but when you bridge that same 4 ohm speaker, it gives you a 2 ohm load on each of the two channels that are now bridged. If you made the mistake of wiring two 4 ohm speakers in parallel (plus to plus and minus to minus) then when you bridge you will be driving a one ohm load on each channel. This is very close to a dead short. Stop using your amp at once until you get your speaker load correct. This will damage your amp and it will cause you to have to go to a repair shop to fix it. DO NOT RUN YOUR AMP ANYMORE UNTIL YOU FIX THIS. Good luck.

Jan 22, 2007 | Kenwood KAC-9152D Car Audio Amplifier

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