Much prefer the 12 gauge if you have speakers less than 94db effecient and more than say 25 Tube or SS watts. More dynamic, better bloom, bass, and midrange saturation. Highs are still all there.
Now if you have highly efficient speakers and 2-15 tube watts, then the 16 gauge is very good indeed.
Now if you have highly efficient speakers and 2-15 tube watts, then the 16 gauge is very good indeed.

