M&K S-150's across the front and 2x 18" sealed Dayton subs. They are crossed at 80. The S-150's are THX spec'd speakers designed for 80 cross. Audyssey actually wanted to cross them at 70 if I remember correctly which made no sense to me.
Thanks prerich. Yes, i like them and they are pretty old, from when they still made them in the USA. I would have no idea how to check for a bad cap but all 3 have the same FR when tested separately so I would think its something else causing the dip, or they all have a fault...
Thanks John. I'll try moving the mic around and see where it changes. It's a dedicated theater room so I can't really play around much with the main listening position location (I have two rows of recliners) or the speakers, they're behind an AT screen. Its in my basement, there's padding and carpet down. I'll try and take a picture so you can see the layout.
Audyssey doesn't seem to be able to get the dip out. I might also run it again putting more focus on the MLP.