I anwered #1 in "Will an amp significantly alter box volume??" thread. As to #2, I would wire each set of terminals on the driver to a separate set of binding posts, run the terminals coming off the amp to a single set of binding posts, and then bi-wire.
Thanks for the reply Super, but what you replied to in my "Will an amp significantly alter box volume??" thread, was #1 and not #2 as you had mentioned. To answer my own #1 question, I believe it's recommended to wire (solder? or spade?) the voice coils in parallel and connect (solder? or spade?) the pos/neg wires to the corresponding locations on the amp.
As far as #2 goes, what benefit does your wiring method have over simply connecting the receiver sub-out to the left amp jack
with a basic RCA cable?
The subwoofer out on my receiver had a fixed crossover point that was a bit too low for my liking. Using the stereo outs along with the crossover built into the amp allowed me to use a higher crossover frequency, and integrate more easily.