MTX 81000D amp doesnt work

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.)

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.

the amp is under to much pressure get a bigger 1

Hello frank_sadach,

"Bridging" connects 2 amp channels to one output. The MTX 81000d is a single channel amp so it cannot be bridged.

Hope this helps.

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.

disconnect the subs from the amp and check to see if the amp will turn on and stay on-check the subs to see if they are blown with a different source try a pair or a single sub that you know works fine on the amp and see if it plays-this should tell you whether your amp is fried or your subs are roasted

There are a number of things that can cause it to act as you described. Have you pulled the covers off of it yet to see if you can see any problems?

If you do, disconnect power from it and don't touch ANYTHING on the board when ANY of the 3 LEDs (2 are not visible from the outside) are lit.

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

hi, your amp seems to be getting power but the cables might be wrong so it's not getting enough power. the light on the amp should be green if everything is going well. are you sure the cables are suitable for your amp?