Unit works, Audiophile beware
The switch works as advertised. The interconnects on the rear of the unit are super cheap and only accept short bare wire (same as all the other reviews). Very questionable with the rated power, especially when you look at the interconnect, particularly when you remove the input/output interconnects for installation. 100+ watts RMS??? The same unit with banana plugs would give me a much better feeling about the quality. Pragmatically, I'm A/B'ing a modern (2017) Marantz 9 channel Atmos system with 11 channel processing (hence this unit) with a 1980's Yamaha unit (THD 0.015%) with line in from the Marantz and it does the job. I can totally hear differences on both amps (0.08 vs 0.015 THD) with the A\B box. All in all, it works.
Cons: Cheap build on the interconnects