Perhaps working with kitchen radios

First, my review was positive. Since I had often dropouts (overload protection), I swapped it for a high-quality device. I also had the impression that my amplifier (Sonos) sounds much better without switchbox. With the new machine everything works fine, the amp sounds now with box and box without equally good. This switch box may work output for kitchen radios with 3 watts, with "real" amps it is useless.