Check the listing for details. Bose S1 Pro+ Multi-position PA System with Battery. Condition: Very Good - Refurbished. Listed at 594.15 USD. Bose's Most Portable Battery-powered PA Yet The Bose S1 Pro+ is an ultra-lightweight, all-in-one PA system that packs a lot of power into its 14.4-pound, multi-position enclosure. Whether you tilt, seat, or mount it, the S1 Pro+ delivers rich, even coverage to an entire room, with Auto EQ to eliminate hotspots on the floor. You get two channels with independent EQ, reverb, and ToneMatch technology to ensure flattering reproduction of voices and instruments, along with a dedicated third channel with an aux input and stereo Bluetooth streaming. Optional transmitters provide a complete wireless experience with microphones and instruments alike, and guitarists will appreciate the S1 Pro+'s built-in FX loop. You also get a livestream mode via USB-C.