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
I agree with Gary,....SUBs should be on the floor as the lower frequencies travel the floor. With Bose compact the highs could get trapped in the sub cabinet with 'no breathing room" not being extended also to cover the room,.... just my opinion. But heck let's get back to the SD7 !!