For just talking or making announcements, on the table is fine, because there is no need for sub-woofer sounds or frequencies. For any type of music, though, the floor with extensions is the only way to go.

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)