Question about MTX Thunder 81000D Car Audio Amplifier

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Mtx81000d 3rd chance

I'm looking for parts for my speaker blower one last time. It was hooked up with all the right wiring and a relay , 0/1 wire, optima 31 series battery, and the amp had been repaired 2 times already with the same thing happening every time. The day it blew it wasnt turned up the outputs of the amp turned in to current and caught my JL w7 on fire. im really just looking for a site or some where to get the transisters i need 2 fix it
also is this a common problem in this amplifier
Its blown $1200 in speakers but i am going to give it 1 more chance

Posted by lou p on

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The original output transistors (SSP45N20A - if I'm not mistaken) for this amplifier are very difficult to find and there are virtually no substitutes that will work without extensive modification. Many techs try to use the SSP45N20B but they don't work reliably.

If you do find replacements, expect to pay $15 or more each. It's possible that there are other problems also. For example, the over-current protection may not be working properly. When it's working properly, it will generally trip when the output transistors fail (which prevents damage to the subs).

This is an old design. The newer amps will be more reliable and will generally offer better protection for the speakers.

Posted on Nov 19, 2007

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bbbind.com

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