Low sensitivity offset by endless power handling. When doing shows, MBL pairs up the 101 with monster power amps and cranks 'em to 11. The resultant silent/LOUD macrodynamic impact is IMO startling.
Or maybe a custom Goto horn system I heard a few years back at Capital Audiofest.
But my current OHM F5s are up there as well.
Must state though that for any speaker to be truly dynamic, one must have the right amp and gear behind it. Speakers are capable of certain dynamics but it is the source material and amplification that is needed also to actually realize it.
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