To reply to Mojo: I have had the sub attached and turned on via Denon for a few years. It has always been the same issue... today I put in Diana Krall... its wonderful... and it took to about 62 db (via radio shack meter 8 feet away from vp150, m22's) before the sub kicked in... maybe this is normal... when in doubt I guess I should email the offending group...hsu/denon ;-) Thanks for everyones input.

To reply to the Master (Alan), I hooked my cd player up as suggested and it kicked in fine...