When did Bose S1 Pro come out?

January 23, 2018
The NAMM Show, Anaheim, CA, January 23, 2018 (Booth #18610) – Bose Professional is debuting the S1 Pro multi-position PA system – the ultimate all-in-one PA, floor monitor, practice amplifier and primary music system, and the latest addition to the acclaimed Bose® portable professional product line.