Bi-Amping Which amp for highs and which for lows?

OP is "original poster", which in this case is you.

@canibefrank, probably better to use double runs of same cables, connected to same output of amp and separate terminals on speakers.
Bi-wiring uses one amp, bi-amping uses two or more amps.

wow, i did not know you could do such a thing.
is bi-wiring preferable to bi-amping in a dual driver full range enclosure? i am building the Castle MT with Alpair 7 drivers

If the speakers have separate binding posts for highs and lows, then, yes you can run two identical runs of speaker cable attached to a single output post on the amp and each binding post on the speaker. Don't use the A and B posts on the amp.

Thanks Tomcarr