Rebel was first referred to as chameleon and the recipient of trickle down technology from Charisma and Serenade. This has not changed. The new Sara, a 2,5-way, 4 ohm, floorstander that simply plays BIG, introduced Penaudio to some interesting new drivers and ideas. Rebel takes the old Rebel loudspeaker to new level of performance. With a new midrange driver, internal wiring and a slightly modified cross-over filter and cabinet, Rebel may be one of the best monitors in its price range available. Musical, transparent, full bodied and smooth. Rebel is no longer a chameleon. It is a leader. Go ahead and base a system around this musical instrument from Penaudio.