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D4N 6th June 2012 04:04 PM

Alpine mrp-m1000 no sound
Hi, Im not getting any sound from my alpine mrp-m1000 amp. I bought this second hand around 4 months ago, tested it when I got it, fitted it to my car last week and had it working for about 2 hours in total over a few short journeys, then nothing. power light comes on and i can hear very quiet clicking sound from both subs.
I'm running 2x alpine swr 1242r subs (came with the amp)
I have checked all connections, tested rca leads, checked the total resistance of both subs which come to 4ohm at the amp terminals.
got good battery voltage, good earth and good remote.

Removed the amp from my car and took off the rear cover, havent tested anything inside yet as I'm new to this but I noticed one of the transistors seems to have got hot as the legs have a darkish tint to them compared to the rest (position Q4901, part number KDY 600K), the circuit board has a slight burnt smell too.

On looking in this forum it seems that a few people have had very similar problems but i'm not sure if they have managed to fix their amps as no-one has said it worked or not.

Has anyone got a service manual for this amp so I can possibly carry out some tests and get an idea of the figures I should expect to see? I may then be able to locate the failed part or parts and fix it before sending it to a repair centre.

My email address is

look forward to any replies. thanks.

Perry Babin 6th June 2012 09:38 PM

This is one of the regulators. They tend to overheat and fail. You'll need to check it carefully out of the circuit if you don't find any other problems (shorted output transistors, blown power supply transistors...).

If you didn't email me earlier for the manual (I had another request for it), email me and I'll send it to you.

D4N 7th June 2012 06:53 PM

Thanks Perry, just emailed you now for it.

D4N 10th June 2012 07:28 AM

Thanks for the service manual Perry,

On doing a couple of checks on various components, I'm not getting the readings stated in the manual.

I'm no electronics specialist and have no idea what has failed on this amp as I don't fully understand how these things work (I'm more of a mechanical person really)

Is there anyone who you guys could recommend in the U.K who would have a look at my amp for me and get it working?

I did speak to a local car audio repair centre but I got the feeling that unless it was something very simple like a blown fuse then they classed it as beyond repair and would recommend a new amp.:(

Perry Babin 10th June 2012 11:49 PM

elchino10 4th November 2013 03:34 PM

I have a similar problem with MRP-M1000 amplifier. Can I get a copy of the service manual.


Perry Babin 4th November 2013 07:52 PM

You need to provide an email address.

elchino10 4th November 2013 11:51 PM

my email is
Thanks a lot for your response

Croccy22 5th November 2013 04:04 PM


Could you send me a copy too please:

Thanks, Matt.

Croccy22 5th November 2013 04:05 PM


Could you send me a copy too please.

thanks, Matt.

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