Decent unit. Takes 4 ohms which is great. The thing that really bothers me are the volume knobs. They click to about 10 setting rather than just being smooth and completely adjustable. Otherwise it’s a pretty good unit even if slightly on the higher priced end for a non-powered unit.
The speaker selector is of commercial quality as stated. The unit is heavy. All of the interfaces are heavy duty. This item just happened to be exactly what I needed; the ability to run 5 pairs of speakers, any of which can be run by either of two amps. This was the perfect solution.