Using a drill bit diameter gauge, I can put the 12/2 wire through a 5/16" hole. Nothing smaller, even by 1/64" works. Obviously, if you are running this through thicker material (2x4 studs), your hole better be larger than the 5/16" bare minimum.
Not much to say about speaker cable other than it arrived as advertised and seems to be great quality as always from Monoprice. I've used a similar version for outdoor speakers with great results for about 5 years. No reason to expect anything but the same from this version. Thanks for a great product at a great price!
Cost effective, safe-to-run-in-walls method for connecting my Dolby Atmos 11.1 Receiver to my Monoprice Amber speakers. I don't know why people complain about its stiffness as I had little problem running it along a wall under the 3/4" baseboard covering the carpet edges. I bent it around 90 degree° corners with a bit of effort. I also ran it through 1/2" holes drilled in the bottom of studs (covered by baseboard trim) where a tile floor prevented me from tucking it under the baseboard. Certainly not convenient, but very doable with a bit of patience.
Worked well for constructing wires (with Monoprice banana plugs) between the AV/R and the wall-plate. However, it required a bit of precision/effort to force the 12AWG into the plugs, but very doable (probably about 2 minutes per plug with the right tools and practice).
I also designed a 3D-printable 8-wire clip (Thingiverse Thing ID: 3059854) Monoprice also sells clips that would probably work well. It was even printed on a Monoprice Architect 3D printer.