I bi-wire with short lengths of speaker cables connecting my B&W N802 each with a 557 in bridged mode connected to the 502 with balanced XLR cables. I'm happy with how this sounds, but some dealers have told me that bi-amping would be better but that would involve having long speaker cables or long interconnects unbalanced. When Meridian had a quality service department in Britain, I asked them which would be the best way to connect up my system and they said bridged mode, long XLR, short speaker cables, so I went with that. In fact, The Meridian service guy said that the 557 was designed primarily as a mono amp with the ability to run in stereo mode, rather than the other way round.

B&W N802, Nhtm1 2xM.805, 2xM.htm, 2xASW4000, Meridian 568, 502, 504, 508, 5x557, VDH Revolution & D102mk3 XLR cables.