Newbie Alert!

Forgive me if I'm not using certain terms correctly or am missing a fundamental rule in what I'm trying to describe.

I have three M3's (just got them yesterday!) serving as my LCR channels and currently have ALL speakers on their sides due to space and WAF considerations. The center is sitting above my TV, while the left and right speakers are sitting on a shelf level with the base of the TV.

From reading some articles and posts I know that there are issues with 'lobing' (what the heck is that?) and dispersion when lying a speaker on it's side, but all the material I can find on the web relates to enclosures with multiple similar drivers i.e. MTM, MMMM, etc.

Do these issues extend to MT designs as well? What am I supposed to hear when 'lobing' occurs? I have a good idea on dispersion differences, but aside from that, what should I be listening for?

BTW, I did do some extremely informal testing last night, and did hear a difference, but need more time to affirm my findings.