Alpine mrp m2000 cutting out

[DanielKusnir]

Hi, i have an alpine mrp m2000 amp powering 2 alpinr type r 12"s. it was working fine until now. It sometimes wont power the subs at low volumes but whenever i turn it up they turn right on, then if i turn the volume back down the subs will play for a short time then shut off. What could cause this?

Things ive tried:

Rewired headunit

Rewired subs in box and to the amp

Switched rca's

Checked ground

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[Side Show 10+ year member]

check your gain? turn bass boost ect off

 

[707 10+ year member]

Electric; I had one and now I have the mrx-240 which I have not hooked up yet. these are power hungry

 

[DanielKusnir]

I dont think it would be the gain its been set 1/3rd of the way up for awhile.

The amps current settings are

Gain- 1/3rd

Bass eq level- +2db

Bass eq freq- 50hz

Lp filter- 100hz

Phase- 0 degree

Subsonic- 15hz

 

[Side Show 10+ year member]

did switching the rca's make any difference? also check your subs and make sure one hasn't blown

 

[DanielKusnir]

Nope they didnt, and when i opened up the box the subs are in perfect shape. They push in just like they should as well

 

[6inarow]

I'm thinking maybe a bad capacitor, it surprises me its not going Into protect mode. ( or is it?) How many ohms are your subs set up for? I had the same problem with a MTX amp I custom modified. I blew up the bridge rectifier running it at one ohm. I'd try getting a multimeter and making shure the subs are at four ohms and not shorting, you have a good ground and power in, and if all fails try taking the cover off and looking for puffed and or loose capacitors.

 

[DanielKusnir]

I'm thinking maybe a bad capacitor, it surprises me its not going Into protect mode. ( or is it?) How many ohms are your subs set up for? I had the same problem with a MTX amp I custom modified. I blew up the bridge rectifier running it at one ohm. I'd try getting a multimeter and making shure the subs are at four ohms and not shorting, you have a good ground and power in, and if all fails try taking the cover off and looking for puffed and or loose capacitors.

I figured it out (i think) i opened it up and the cable that goes from the board with the rca's to the main board was slightly unplugged. I pushed it in and now it works perfect again