I have a mtx thunder 81000d amp i need to know if i can bridge it

The mtx thunder is a 4 channel amp. 4 channels can't be bridged to 1 speaker. You can only use one side of that amp to bridge your speaker. Unfortunately your now only using half your amp.

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

wire each speaker like this and go to the amp.

Wiring Option #1

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.

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.

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

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

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