>>A) it's laid out horizontally for easy placement

Expanding on (A) a bit more -- when you orient a speaker horizontally, you need a symmetrical layout to avoid mucking up your imaging. What you don't want is low and high frequencies coming out at different horizontal locations or your ears get confused. If you look at the VP100, for example, the two woofers add together so the apparent sound comes from the same spot as the tweeter...

When I was playing with the M2 as a center channel I found that a single vertical M2 worked great, a horizontal M2 sucked, but a PAIR of horizontal M2s (with tweeters together) worked great.


M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8