The person who asked if he could splice 12 to 14 ga. wire.; - - - well to that I'd say "with the equipment "laundry list" you stated, the last thing I'd be worrying about is wiring." Coat hangers might even be O.K. This person must really be on a tight budget. I don't think "HIGH END AUDIO" is the hobby for you.
Sorry for the sarcasm !