subwoofer speaker cables under the house

I forgot to mention the main reason I suggested the Belden
1694 is because it uses a copper center, and sheild too I
think.1694a is a solid copper center,1694f has a stranded or
more flexible system.Regular RG6 is mostly copper covered
solid steel center,and aluminum shielding.Not the best,but
gets by.A friend uses RG6 for 6'interconnects,and says it
works great.I haven't heard it though.The dealers might be
of help about RG6 for sub-interconnects.Maybe while your at
it,think about CAT5e- CAT6 cable runs for future something?
A link for 1694 cable.>>>[http://www.belden.com/pdfs/Prodbull/NP233.pdf] Belden makes all kinds of a/v wire.

SORRY! I misread your question.I was thinking line level.
Signed Embarrassed!!!Maybe 12 gauge CL3 for in wall
use.Whatever brand,I think it needs the CL3 rating for in
wall use.

FYI, IMHO you should have both lengths equal. Especially at those distances. Shorter lengths would not matter so much.

I second the Blue Jeans cable.

mitcables.com/available-in-stores/custom-installation

i use this stuff for my surround long runs inwall.