MTX Thunder 81000D Car Audio Amplifier - Answered Questions & Fixed issues

hola tengo una potencia mtx 81000d necesito ayuda escribanmen fachaaguiararrobahotmailpuntocom

There could be two things wrong. make shore ur ground is same size an ur power or ur amp isnt pushing the right watts for ur speakers

Most likely the ohm load is too low, if you have the subs wired in parallel rewire them in series and see if that resolves the problem. if not then you do not have enough battery power to support the draw that the amplifier pulls. if the vehicles voltage drops below 11.5 volts the amplifier will momentarily shut off, similar to how the lights in your house dim when the a/c cuts on due to the sudden power draw. hope this helps. p.s. if you cant afford another battery right away, lowering the crossover frequency to around 65hz will greatly reduce the amount of current necessary to keep the amp pumping. (in my opinion it sound better that way anyhow.)

Have you checked to make sure your sub is wired correctly to the amplifier?

if you are in the tallahassee,fl area call 850-339-1130 Capital Audio & Electronics Repair we repair all namebrands & all models

When installing an amplifier of this size and current draw - the fuse is NOT ON THE AMPLIFIER.

This particular amplifier has a built in thermal shutdown protection only.

If the INLINE fuse is failing... only 2 things that would cause it....

1. Fuse rating too low - The current draw + wire resistance is greater than the fuse allows.

2. There is an immediate ground situation. There may be a screw though the power wire - the wire may be worn where it enters the firewall - or there may be a strand or 2 of wire jumpering from the Power terminal of the amplifier to the chassis (of the amplifier)

The recommended external fuse rating is 150A for this amplifier. Please be sure you are using the proper fuse for the amount of current draw this amplifier requires.

If there is an additional amplifier drawing from this feed - add the fuse rating of that amplifier to the INLINE fuse.

ALSO - be sure your wiring is of the proper gauge. I/0 wire is necessary in this instance - (or 2 runs of 4GA) as it has less resistance to the current. Utilizing an insufficient power wire will also lead to the INLINE fuse blowing.

If you have additional questions or concerns - feel free to ask.

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did u check the fuse in ur amp

blown fuse?speakers on their way out? check the amp fuses, then the inline power fuse.

wire each speaker like this and go to the amp.

Wiring Option #1

thunder 81000D not bridgeable,i have two daul voice coils kicker cvr how would i wire them up?

first of all you should check the minimal impedance your amp handles , if is class d it should handle between 1-2 ohms total impedance in a mono conection , meaning whatever quantity of subs you have hooked to your amplifier,their total impedance should the minimum the amp handles that way all the power from your amplifier will be used.

you have to send it to mtx. Most repair shops wont touch it. You can call mtx i had the same amp. It cost about 85 bucks plus shipping. the 85 bucks covered return shipping also.go to there web site it has the info for tech support and repair issue there. hope this helps

The red light indicates that your amplifier is in protect mode. Amps go into this mode if there is something wrong with the setup of the system to prevent fatal damage to the amplifier circuitry. This is bad thing since the amplifier will not function until the problem is solve and it can remove itself from protection mode.

Amplifiers can go into protect mode for many reasons but one of the most common is incorrect mounting. Is your amp sitting on the metal of your vehicle? Is it bolted down and screwed into the metal of the vehicle or your seat? The amp should never be touching any sort of metal. Only the ground should touching the metal of your vehicle.

Speaking of grounds, many people often neglect proper grounding which can cause an amp to go into protect mode. Do you have a solid ground? Is the wire less than 3 feet long and directly connected to a non-painted metal part of your vehicle? Is the ground wire the same gauge as your power wire?

These are just a few reasons why an amp can go into protect mode. You can find more information here. Or simply google for why your amp is in protect mode.

when you do find a replacement use Kapton tape to reduce the heat on the parts use around component and around surrounding area except the place to be soldered

D198 is a diode. It burns when the amp loses the chassis ground connection and the amp tries to ground through the RCA shield. If the amp is still working, it's better to leave that diode out of the circuit. That's what MTX did on later models.

Depending on whats wrong with it, bench fees to check it usually start at $45 and then they will tell you parts and labor. without knowing what burned up its hard to quote.

i have a 81000d for sale for 250 dollars car money still in perfect condition i am pushing 3 12 inch alpine type r subs

You either are suffering from phase problems with the way you have your subs wired or you fried them and just don't realize it. I sell the TE1501D and these amps are not poorly made, they are however too powerful (1500+ @ 1ohm) for most subs on the market to handle continiously.

You should open the amp and check if you've popped a transistor. It could also be that you've blown a relay... which really sucks lol

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.