The Icon P-80 Network Preamplifier ($2,000), M ... optical, USB, and two analog inputs. Being a network preamp, the P-80 supports AirPlay 2, Chromecast, and Roon Ready, allowing seamless ...

It uses optical mechanical switches that stuffs an analog optical sensor, like those once used in optical mice, underneath every key on the keyboard. Suddenly, a key is no longer a digital input ...