I detect a difference between 80hz and 90hz. At 80hz, although the front sound-stage is a little more seamless, it has a little bit of a muddy sound in the heights in the low freq. range. When I switched it to 90hz on my Denon 4311, although I lost a little bit of the seamlessness, it produced a much cleaner sound. So, I'll probably stick with 90hz.
Plus, my QS8 surrounds are set at 90hz (as set by Audyssey) so they match those perfectly now.
Edited by VoicOfReason (05/23/13 11:46 AM)
Epson 8350 * Denon 4311CI * XPA-5 * M80/VP180 * 2 QS8's+M2v3-DSX * SVS PC13-Ultra ** Buttkicker LFE