Due to the weird construction of the room I have to run longer speaker cables for my rear speakers. Is 12 gauge sufficient for 40 feet long runs? I need 40 feet for one speaker and 30 feet for the other rear speaker. Are there others that have runs longer than 40 feet? Also should I make the other one 40 feet also to have them equal length if I have any left over (I bought 100 feet spool)?

Axiom M60s, VP150, QS8s, EP500 -- Rotel 1075 & 1068 -- Panasonic BDT500 -- Panasonic 60S60