My home theater installer has run 16/4 speaker wire for my system. My question is: will there be any substantial (or noticable) sound degradation by using the 16/4 wire instead of 12. The speakers are B&W Signature 7 in-wall (about 4 ft. run from receiver) and B&W CCM80 in-ceiling (about 20 ft. run from receiver). The sub is about a 22 ft. run from the reciever. Also, the Sig 7 speakers can be bi-wired. Should I do this? Thanks in advance.