This has to do with speakers as much as amps, but I'll only post to Amps: This may sound stupid, but... When you bi-wire speakers, you remove the bridges on your multi-pair speaker terminals (tweets and subs) so you have an amp of X watts feeding the speaker X watts to the upper pair, and X watts to the lower pair. 4 receiver outs (A set pair and B set pair), 2 -/+ wires, 4 speaker terminals used (two pair). What happens if you forget and leave the +to+ -to- bridges on your speaker terminals when bi-wiring? What happens if you bridge +to+ -to- A and B sets at your receiver and send a single lead to a single pair or terminals at the speaker (say, if you only have a single pair at the speaker)? I am guessing that we are then talking about receiver damage, smoke, and fire, but I'm not certain. Thanks.