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
Just curious. What is your point of reference in comparison to your assessment? I don't remember if it's been mentioned. If it has, why don't you go and get one of those?
Not sure of the question,a bit convuluted..
However the bass now exhibits consistent weight & depth.
The mis-wiring is certainly a big catch, but I don't think it would have caused the bass-disappears-after-an-hour problem you originally had. Guess we'll find out.
I think the law of diminishing returns has overtaken us. I never did like Danish cheese.