I've broken every rule in the book except the MLP isosceles. That includes placing my 800v4 at almost the mid-point of the wall behind my MLP. It is absolutely awesome!

I've tried many other locations and surprisingly it sounds very, very good at all of them. Some locations though excite my gas fireplace's fundamental resonant frequency more than others.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated