Question about MTX Thunder TA7801 Car Audio Amplifier

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Amp is not coming on

All the wires are hooked up and i just replaced and power wire because it was a 10 gauge to a 4 gauge. before i changed wire it worked but i blow a fuse witch caused me to change wire size. what would cause my amp to stop working now when all i did was change the wire and fuse?

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Re: amp is not coming on

The fuse may not be working, you could try a larger sized one, also if you have the old power cable try it again with a larger fuse in place, if it worked before its likely to just be the fuse wasnt big enough, check all the other connections are in the right place, if they all are and you know the amp hase worked before then it could only realy be the fuse isnt big enough or the power lead is faulty.

cheers, adam

Posted on Nov 18, 2007

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Need to install a cdplayer in 70 chevy truck?

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What type of "Gauge" wires should I be using for the Kicker ZR600 AMP (Power cable, ground, Speaker wire)?

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it could be one (or more) of several issues. ensure none of the speaker wires are connected to the ground of the car, or to each other. ensure the speakers are not blown. check to see if the amp comes on ok without the speaker wires hooked up. your battery may be low - check voltage at the power terminals of the amplifier to ensure you have operational voltage. you may not have a sufficient ground connection - ensure the ground wire is less than 18 inches, is of proper gauge (minimum 10 gauge, the lower the gauge the better), and is connected to a sturdy connection going right to the ground plane of the car - make sure the paint is scraped off from under the point at which the ground wire terminal is screwed to the ground.

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If you're buying a power wire kit, it most likely won't have a separate distribution block for the ground wire (usually they have separate ground wire for each amp or one piece that's long enough to cut and have wire for both). This is fine, but you should look for a kit with at least 3 feet of ground wire per amp - any shorter and it's a struggle to mount the amp close enough to a ground point. As above, the main power wire to the battery should be 1/0 gauge.

Lastly if a 1/0 gauge kit is not available, 2 separate 4 gauge kits will work, however that's obviously a lot more wire to run and conceal.

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Hi jimmyjames,


How do you have the wires hooked from the sony reciever to the inputs on the mtx? 

 Sounds like your Remote wire is way too big. it should be 14 guage.  It only sends a low voltage low amp signal.


Another thing that could be messing up the sounds is the routing of the wires.  you should have the power supply wires separate from the Audiop signal wiring.  Power should run down the Driver side and Audio down the passenger side.


When you answer I may be able to tell you more.


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