I visited my brothers gaf the other day and had a look at his hi-fi. He has a set of B&W P4's and has bi-wired them but has used his Arcam 10's speaker set A for the top terminals and his speaker set B for the bottom terminals. At the time he seemed only to be running on speaker set A. What would be the effect of this. He is adament that it sounds great (although he's had it wired this way from day 1). The dufus is wrong surely?