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Gamut M250 MK3

I got a pair of Gamut M250 Mk3 mono-blocks that went in place of a D200 mk3. They were installed yesterday, and worked fine for a day. This morning I turned on the amps to warm up. A bit later I went back to the listening room and heard a very loud hum. First I looked out the window for a garbage truck; then put my ears against the speakers. Nothing there. It was coming from the amps. Power-cycle of both amps confirmed that both were making that noise, though one was louder than the other. About 10 minutes later the noise was gone. I have a feeling that this might be one of those intermittent problems that's difficult to track down, but I do want to get to the bottom of it while they're in warranty. To other owners of the M250, have you ever experience such a problem?
ping2357
samtse
49 posts
 
I never use and listen Tannoy GRF,so i don't know.but i think if you can have a M250 mklll for a good price,i think it's worth because you don't need change amp on future.M250 mklll can drive most of speaker in the world.
nico_g
35 posts
 
Do you have compared the Gamut with Pass amps, like the X350.5 or the new XA.5 series ?
samtse
49 posts
 
I didn't compare.but both amp is good.and if you buy PASS amp,you need to concern the impedence because it's low.
nico_g
35 posts
 
The nwer Pass amps have correct input impedance.
And my source has a very low output impedance : less than 50 Ohms.
samtse
49 posts
 
if you love PASS sound,just go ahead,trust your ears
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