Whoops, double post. As long as I'm here, I tried the second option from the above list (raising the speakers, but not so much) and that seemed to help quite a bit, ie the improvement in bass was noticeable and any loss in higher frequencies was not.

I don't know how much of the improvement came from making the stand effectively more solid vs getting the drivers & ports closer to the floor, but guessing the reduced height made relatively more difference. Anyways, the M40s are about 6" off the ground now and are sounding good enough to leave alone for a while.

Last edited by bridgman; 09/01/14 07:01 PM.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8