You know, I am not sure. Acoustic sounds had them playing in a large room at RMAF 2006. It's possible. I heard them later in the UK in a typically small flat and was able to compare them-without external drivers- with a pair of Quad '57s. I think it was that comparison that really floored me. I have since been shown how to construct DIY external cross-overs for much less. The directions and source are on the Yahoo LS3/5A board. These speakers work marvelously in my acoustically awful loft room with both Quicksilver minis and Blue Circle SBM (SS) monoblocks. For laughs I set my system up in my tiny Danish bathroom (3-4m^2) and they played wonderfully well even in those close confines (for which they were designed). You can't even get a pair of Wilson Watt Pupies into a can this size, let alone have them sound good.