Two versions are available to suit any system: all-analog for more traditional systems and analog+digital for the streaming digital media listener. Excellent power, dynamics, and control from 200W of amplifier power into any loudspeaker load. The analog+digital version of the 866 adds digital inputs for USB, Ethernet, AES3, Toslink, plus Roon integration. A dedicated Boulder app controls the 866 and makes custom setup adjustments, including adding photos of your sources to the inputs shown on the 866’s front panel, optional RF remote for volume control and switching inputs also available.