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

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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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2000 Mitsubishi Spyder Interior Fan Only works on 3rd position. Fan Only works on 3rd position. Changed Fan speed control (Twice), resistor , fan ,and relays, But no change. Just one speed on 3rd...

Well according to the wiring diagram, the blower relay gets power from two sources and feeds the fan switch. High speed bypasses the resistor and goes directly to the blower motor. The other speeds go thru the resistor and the motor is grounded.
The AC control panel is connected thru the low speed which would include the other speeds also.
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Front left and right speakers don't work often. I'll hear a "click" and they'll both come on for a while.

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Here' s the colors to look for in the dash:
1994 Ford Probe Car Radio Stereo Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Blue/Red
Car Radio Accessory Switched 12v+ Wire: Blue/White
Car Radio Ground Wire: Black/Pink
Car Radio Illumination Wire: Orange
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: Light Green/Yellow

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Left Front Speaker Negative Wire (-): Blue
Right Front Speaker Positive Wire (+): Blue/Black
Right Front Speaker Negative Wire (-): Blue/Orange

Left Rear Speaker Positive Wire (+): Light Green
Left Rear Speaker Negative Wire (-): Green/Orange
Right Rear Speaker Positive Wire (+): Green/Yellow
Right Rear Speaker Negative Wire (-): Green/Blue

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1 Answer

How to hook up my stereo

I hqave taken the time to look this up, please take a few seconds rate the solution, thanks.
1995 Honda Civic Car Stereo Radio Wiring Diagram
Car Radio Constant 12V+ Wire: Blue/White
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Car Radio Ground Wire: Black
Car Radio Illumination Wire: Red/Black
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Car Radio Power Antenna Trigger Wire: N/A
Car Radio Amplifier Turn On Trigger Wire: N/A
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Front Speakers Location: Doors
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Right Front Speaker Wire (+): Red/Green
Right Front Speaker Wire (-): Brown/Black
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Left Rear Speaker Wire (-): Gray/White
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Right Rear Speaker Wire (-): Brown/White

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Car Radio Constant 12v+ Wire: Red
Car Radio Switched 12v+ Wire: Red/White
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Car Stereo Dimmer Wire: Orange/White
Car Stereo Antenna Trigger: Yellow
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: Behind the glove box.
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Dark Green
Left Front Speaker Negative Wire (-): Brown/Red
Right Front Speaker Positive Wire (+): Violet
Right Front Speaker Negative Wire (-): Dark Blue/Red
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown/Yellow
Left Rear Speaker Negative Wire (-): Brown/Light Blue
Right Rear Speaker Positive Wire (+): Dark Blue/White
Right Rear Speaker Negative Wire (-): Dark Blue/Orange

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1 Answer

Speaker system

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