As long as the speaker is being fed from a single amplifier channel, you are bi-wiring. When the preamp-out is going to two (or more) amplifiers (per channel), you are bi-amping. Can't guess why bi-wiring from "A" and "B" terminals sounds better than from "A" alone. Can only say "trust your ears" (and don't blow up your speakers!).
How do you bi-wire?
I've tried bi-wiring by connecting the two ends of speaker wire together on the end that connects to the amp. Then, I separated them at the speaker. There was improvement. Then I separated the wires that connect to the amp and connected them separately to speaker "A" and "B" connections. I turned both speaker switches on. Connecting separately to "A" and "B" improved the clarity quite a bit. My question is, am I doing this right. I know it must be a simple question, but I don't know.
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