After a 10 years experience with Gryphon Callisto 2200+Dynaudio Confidence 5, I swear this is a very good combination (even with Dynaudio's own OCOS cable!) able of endless and dramatic improvements. For example, using SILTECH LS cables instead of OCOS (these "humble" LS 38G3 and LS 110G5 mk2 of mine) you get much more air, much more space, much more depth, a much better bass and a more realistic, detailed and harmonic music rendition, for all kind of music styles). The Callisto 2200 and the tiny ProAc's response 1sc, form another outstanding team (deserving better LS cables than OCOS). I have suffered those OCOS cables several years (the so called LOST YEARS) and when I awoke, I cried: Dynaudio did and does wrong recommending such an average and overpriced cable for their higher models (c1, c3, c5, c2, c4 are those Confidence models which I have once heard quietly). HQ mains cables improve things a lot (I've got hms and siltech chords; but I dream on bigger snakes). Better interconnects are exponentially noticed; I've got an absurdly expensive Gryphon reference XLR (sounds like a low-end Siltech) Kimber phono and old /not so old siltechs. Sources: Electrocompaniet EMC-1 cd and a basik Linn Sondek LP12 TT+Benz phono+Benz mc. As Linn's, Gryphon's products are ridiculously overpriced, but any of their first 4 integrated amps, Tabu or Callisto, was quite good business. However, I hate and I always hated Callisto's look ( most Gryphon's are badly ugly, nordic art!). Heureusement, if I close my eyes, that THING makes a great job with those Confidence 5 or with these ProAc 1sc.