High quality amplifier to speaker switch

I use One pair of speakers, Goldenear Triton One.R, for both tv listening and for more serious music-only listening. For music, the system consists of high quality vacuum tube preamp and solid state power amps. For tv, I have a much more modestly priced (and small) class D amp - saving wear and tear on the tubes and expensive stuff.Does anyone have a recommendation for a switch box to switch between the 2 amps to the same speakers? I would like there to be almost no sound quality degradation.
I know there are some old posts on this, but have not seen a definitive recommendation.