AudiogoN Forums: Gamut M250 MK3

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 (Threads | Answers | This Thread)

10-03-08

Responses (1-28 of 28)

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10-03-08 Http://www.psaudio.com/articles/hum.asp before you throw mo ... Ngjockey

10-04-08: Ping2357
Granted that there might be DC in electrical network, but there it has never cause any amp to hum this much. I've live in this house for 10+ years. The D200 was connected via the same AC cords to the same outlets for 1+ year. I am trying to determine if there's a problem with the M250. Maybe the transformer came loose during shipping? or there's a faulty cap? It was a very loud mechanical hum that made me look outside the window for a garbage truck or motocycle.
Ping2357 (Threads | Answers | This Thread)

10-04-08 Boths amps acting up at the same time? G_m_c

10-04-08 Funny coincidence, i've been having the same (or a similar) ... Drubin

10-05-08 Yes both amps made that noise, though one was louder. it's ... Ping2357

10-05-08 Shortly after my last post, the amps started making that lou ... Ping2357

10-06-08 Send them back while still under warranty. i'm using a di-15 ... Psjulian

10-06-08 I hate to send them back, but i may have to do that. when i ... Ping2357

10-06-08 Psjulian, thanks for the confirmation. i hooked up the d200 ... Ping2357

10-07-08 Good luck! Psjulian

10-08-08 I used gamut m250 mklll about two years,every day 4to6hours. ... Samtse

10-09-08 Hello, i ould like to have informations about the sonic diff ... Nico_g

10-09-08 I tried pass (x350?) with my sonus faber stradivari. it was ... Ping2357

10-10-08 Thanks for your answer. the big differences between the d200 ... Nico_g

10-10-08 M250 of course bass control and extension is better than d20 ... Samtse

10-11-08 Thanks for your answer. so, the m250 is worth the upgrade ev ... Nico_g

10-12-08 I never use and listen tannoy grf,so i don't know.but i thin ... Samtse

10-14-08 Do you have compared the gamut with pass amps, like the x350 ... Nico_g

10-15-08 I didn't compare.but both amp is good.and if you buy pass ... Samtse

10-16-08 The nwer pass amps have correct input impedance. and my sour ... Nico_g

10-16-08 If you love pass sound,just go ahead,trust your ears Samtse

10-16-08 Hi nico_g. nothing wrong with pass, but in my system, i just ... Ping2357

10-16-08 Sorry to side track a bit.. but having owned the strads prev ... Bvdiman

10-17-08 I like the gamut a lot, but, you know, pass is very good too ... Nico_g

10-17-08 Hi ping,i also using tube pre(aesthetix) with my gamut am ... Samtse

10-18-08 Hello, my gamut d200 is directly connected to my dcs elgar p ... Nico_g

10-24-08 Samtse, i am using first sound presence deluxe 4.0 mk ii. i ... Ping2357

12-28-10 Back to the op question about the hum. i once had a large a ... Ckoffend