so up to now, primary listening has been radio (mix of AM/FM both HD & non) plus XM. today i tried a couple of older CDs - Grofe's Grand Canyon Suite and 77s More Miserable Than You'll Ever Be. Surround Sound enabled, EQ set flat (as is the case with radio listening).
the only phrase that comes to mind is "midrange honk". it's clean, but not crisp, and there is no bottom to speak of. even with the bass EQ'd to top, tympani, string bass & bassoon are just not there (speaking Grofe there - 7s have no bassoon

).
the local dealer has a couple others on the lot; i think it's time to do an A/B comparison. it's almost like the sub is inoperable ...