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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
 
Just ordered Acoustic Arts Power 1 mk.3 intgrated amp w/phono..200 watts
tboooe's avatar
tboooe
1,009 posts
 
Well done Fishing716. I own the Power1 mk2 and absolutely love it's clarity. I have no complaints other than the cramped quarters in the back. I would love to hear your thoughts once you get it. By the way, I had to burn in my unit for around 50 hours before I got good bass.
tboooe's avatar
tboooe
1,009 posts
 
Btw, my previous integrated was the MF M6i! I didn't have the bass issues you mentioned. In fact, I thought the M6i was very good. I think it sounds a bit more organic than the Accustic Arts, doing a better job with stringed instruments.
mapman's avatar
Ag insider logo xs@2x
mapman
15,679 posts
 
Tbooe,

I see you use smaller monitor speakers whereas OP was having his bass issues with larger full range speakers that are probably more sensitive to amp matching due to more low end extension.
tls49's avatar
tls49
1,318 posts
 
I'll be curious to hear the outcome of the new amp, which is rated at 135 watts into 8 ohms and 200 watts into 4 ohms.
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