Bass leaves after amp warms up?

I had a Musical Fidelity A308cr power amp for a few years and it was excellent. If the M6 is anything like the A308cr, I don't think that's the problem.

If it is, this is the Class D amp that I use and it will take a hold of your speakers and tell them what to do: http://app.audiogon.com/listings/solid-state-spectron-audio-musician-iii-mk2-w-free-v-cap-upgarde-new-sealed-2013-04-03-amplifiers-91325 Tell them that you want it without the V-Cap upgrade and see if you can't get it $3,500.00.

You may want to borrow someone's CD player that is better than yours and see if that's not a problem. If it is, relax and wait until you can afford a better one.

Chuck

I did listen to the two files but had trouble identifying the difference (my current system does not go very low in the bass, however). Both sounded extremely bright and spitty. How did you record them?

I just put a cd recorder in my listening position.
Recorded one when the bass was full then 1 hr.later when it was not..
One version gives the groove of the song while the other is lacking

Krell man, I take it you 'are' no more:) Those are some serious reviews.

Krellman, Well said. FWIW, I agree with I with you on all three points.

One of the reasons I recommended the SPL meter was for the OP to see for himself that his problem was not with absolute volume level of the bass. He just likes his system's sound when it is cold and the HF's dominate the sound and the sense of speed that can impart to the bass. Most of us, I think, would not consider this to be a balanced sound, but he does and that is why most folks couldn't really figure out his problem or how to solve it, we just don't listen to things with his ears nor his preferences. We have just assumed that he listens with our ears and priorities.

As someone suggested, if that is a sound he really wants, he needs to evaluate his components after they have warmed up and select components that will give him the overall sound he is seeking. A daunting task I suspect.