Hello TomTuttle,
Hope you are well.
Wow, that picture makes it look like you are very close to those M60s. Those are M60's yes?
Ideally I would think 2 feet or more of space would be plenty to let the Vortex port breathe side to side and to the back.
I am thinking the farther the better with the tweeter from any surface, those frequencies are very interactive, and will bounce around.
Unfortunately any speaker in a little alcove is going to be limited in soundstage and imaging. If you could put that VP100 on a short stand in front of the TV, I believe it would sound much better. Maybe only use the stand when you are actually using the HT, and then put it back in its proper WAF approved spot in the entertainment center when not in use.
Some companies utilize a 3 way center with a tweeter above a mid between two woofers. Supposedly to improve imaging.
Later,
TonyM
