Speaker height vs ceiling height

Height is not nearly as big of factor as length and width are. For someone to say you could not put a 6ft speaker in a 7ft tall room is making a way to blanket statement. IMO.

Thanks all. Looks like things are more complicated than I thought. I would not try anything taller than 5 foot.

Chad,
most room mode calculators treat the ceiling as just another surface . It may absorb more energy than say.....a slab floor or sheetrock wall, but still and all, you must treat it with respect.
Construction makes a big difference.

The mitigation is the order of drivers. Tweeter at top of a TALL speaker may interact more with the ceiling while the woofer at the bottom, may interact more with the floor.

He may be able to get away with a tall line source?

I do not really qualify to address the issue, but intuitively I would certainly leave couple of feet between speakers and ceiling for dynamic speakers. Panels might tolerate less space above them, I guess. And horns...I have no idea.

My basement ceiling is about the same height as yours.
My speakers are 5' with no problems.
Don't think I would try anything taller in a speaker, but I could be wrong.
BTW - Which 6' speakers were you thinking of?