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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
fishing716 OP
316 posts
 
Can anyone recommend Yamaha paired w/PSB Synchrony one's or is Musical Fidelity pre/prx much better choice?
lowrider57's avatar
lowrider57
5,411 posts
 
Don't know, but again the issue of of output power comes up. You need an amp that doubles down it's power from an 8 ohm load to 4 ohms. The Yamaha does not. (Remember the impedance curve of the Synch One drops below 4 ohms).
That's the solution to drive those speakers IMO.

Look for this topic in the earlier comments. Go looking for Almarg's postings....and Dan Wright's info.
fishing716 OP
316 posts
 
The MF pre/prx are 250watts in 8ohms
Would expect that's enough watts to drive synchrony one.
Others have good results with just 120w
rrog
1,958 posts
 
Deja vu
mapman's avatar
mapman
22,117 posts
 
Fishing,

You should really review the thread and take tne doubles down to 4 ohm advise seriously. You might find a good match otherwise but that is the spec that will help identify the amp you need. I thought you understood this and were going down that path but now it sounds like you are back to where you started.

Good luck. Not much else to say at this point except live an d learn.
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