Below link will calculate how many watts you need.Which sub would you suggest?
I am apprehensive whether the AVRs (vsx934 7.2 @80w 2ch or lx304 9.2@100w 2ch) are sufficient? I can't find any reasonably priced avr with pre-outs. These seem to have vanished, though practically negligible cost attached to give preouts.
May have to open box and connect directly after warranty. LOL.
Also can I use Amazon basics 16/14AWG speaker wires? Very decently priced