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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

Showing 7 responses by nico_g

nico_g
35 posts
 
Hello,
I ould like to have informations about the sonic differences between the D200 mkIII and the M250 mkIII.
I actually own a D200 mkIII with my Tannoy GRF and I'm very pleased with it.
I have the opportunity to buy M250 mkIII amps but is it a good idea ?
My other solution would be a class A amplifier, like Pass XA.5 series.
Thanks a lot for your advices.
nico_g
35 posts
 
Thanks for your answer.
The big differences between the D200 and M250 are more power and channel separation ? No big difference in sound, for example bass control or extension ?

What was the problem with the Pass : could you explain a bit more ?
nico_g
35 posts
 
Thanks for your answer.
SO, the M250 is worth the upgrade even if my speakers are easy to drive : Tannoy GRF ?
I can have a pair of M250 for a fair price.
nico_g
35 posts
 
Do you have compared the Gamut with Pass amps, like the X350.5 or the new XA.5 series ?
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.
nico_g
35 posts
 
I like the GamuT a lot, but, you know, Pass is very good too : I talk about the Call A models like the XA100.5.
I'm sure that the Class AB designs like the X350.5 aren't as good with easy to drive speakers like mine.
The Tannoy GRF are 95db/W/m with 15" woofers and around 8 Ohms impedance.
nico_g
35 posts
 
Hello,
my GamuT D200 is directly connected to my dCS Elgar Plus, no preamp for me.
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