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damuffin 30th January 2013 10:45 PM

M&K 250w Sub amp awaken issues
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Im having an issue with the M&K 250w Plate amp and was wondering if you could help me out? It wont produce sound from sleep until you disconnect and reconnect the power. What component in the circuit should i be looking at?

TANDBERGEREN 31st January 2013 12:04 AM

Got some schematics?

damuffin 31st January 2013 12:06 AM

Not yet, but Iv'e got the word out.

TANDBERGEREN 31st January 2013 12:18 AM

By the way, M&K as in Miller & Kreisel?

And the amp is the one in the M&K S-250P?

damuffin 31st January 2013 12:26 AM

MKsound MX250.

boywonder 31st January 2013 04:41 PM

3 Attachment(s)
I have one of these M&K amps, as well as a Parts Express 300-794 amp, and they appear to be the same. Here is a schematic for a 250W PE amp, although I'm not sure this is the same as above.....

Edit: To add to the confusion, the PE amp box says P/N are a few pics of the PE amp.

TANDBERGEREN 1st February 2013 12:03 AM

I would say it is a perfect match boywonder.

And now: Schematics in readable format?:D

boywonder 1st February 2013 12:35 AM


Originally Posted by TANDBERGEREN (
I would say it is a perfect match boywonder.

And now: Schematics in readable format?:D

Looking close, the M&K PCB above is quite different, with a number of multi-legged critters on this of the board.

That's all I've got for a schemo, and I'm only half sure that's its for these amps. It's a PDF, so if you want, I can email it and you can enlarge.

TANDBERGEREN 1st February 2013 12:39 AM

I would guess they just are SMD-versions of the OP-Amps in your preamp.

The output amp is most certain identical.

damuffin 1st February 2013 01:31 AM

Iv'e asked Mr Kreisel for the schematics. We'll see what happens.

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