Yep your right I think he thinking of the ConcertoSorry, but the 104aB uses a bass radiator, not an active woofer. Don't take my word for it, check out the KEF museum at :
http://www2.kef.com/gb/about/museum
They sound great and effortless and I have never cranked the amp higher [B said:than 1 o'clock.