I have one, and it's just as loud as the A2 / 6400, and has the same amount of power, but it doesn't have much bass. The speakers are wound too tight like a snare drum.....it's not as warm as the A2. Still a bangin' system though, with killer looks. Oh, and it's the inner two on each side that are passive radiators (true damped passives by the way, with voice coils stitched into the cones, unlike the un-damped pseudo-passive on the Aiwa CS880).
So it's got a total of 6 active speakers and 4 passive. Not sure why they bothered making it that complicated.....They should have kept the A2's setup..... but I guess they were going for looks.