2. amps-preamps
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Bass leaves after amp warms up?

I don't understand-after my Musical Fidelity M6i amp warms up for about an hour I notice the deep bass & kick drum aren't the same.
They sound less musical with loss of weight/depth.The notes are there but the moving of air have left.Sound is has much less impact and boreing.
I had the same problem with Bryston amp so there is no defect with amps nor with the rest of my equipment/
PSB Synchrony one speakers,AQ cables,Bryston CD Player.
My question has anyone heard similar & is there a plausable reason?
fishing716
mapman's avatar
mapman
22,333 posts
 
"'I can't assume a dedicated power amp will solve the problem till I try."

It's an assumption until you try but based on sound supporting evidence that the amp is not the best amp for those nominal 4 ohm load speakers. Other than this, pretty much all else is pure speculation at this point. So address the known issue first. It will persist no matter what else you try or do otherwise.
fishing716 OP
316 posts
 
"What was the most recent change to your system"?
Nothing,just a different cd player

Musical Fidelity integrated amp & phono preamp
PSB Synchrony Speakers
Rega P5 TT w/dynavector cart
Audioquest cables
rrog
1,958 posts
 
What was the most recent change to your system before the missing bass syndrome.
georgehifi's avatar
georgehifi
10,312 posts
 
Fishing716: I just looked at the internals of your M6i amps on Google images and I must say for a 200wrms per channel amp the power supply does look a bit on the thin side to what I would like to see, esspecially the amount of storage caps. And a single dual winding transformer for such a high power rated amp should really two tranise of the same size. Suggest you try another amp to see if fixes your problem.

Cheers george
seikosha
218 posts
 
I can't imagine that the amp (unless it's defective) is the problem. Most of the Musical Fidelity stuff is designed and advertised to drive difficult loads. That M6i is supposedly rated at 400 watts into 4 ohms and the poster has said over and over, it never gets warm. Seeing that the poster had the same problem with other amps makes me wonder if we will ever get to the bottom of this.
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