After reading the additional info at AVS I see that this is a weird problem- if you didn't have the HK to compare to I would also wonder about placement, but sounds like it isn't that.

I was thinking that if your bass sounded more muddy, that maybe the crossover was too high- but your settings at 80Hz should be just fine.

Good luck and let us know how the 804 works out.


-Dave

M80s VP150 QS8s EP500s
ravenmanor.com/cinema/