About Bose S1 Pro+ Make Music That Moves Musicians transform sound into something more. It's how you get us off our feet. Make us move, shake, sing, and leave a lasting impression long after the track ends. This ability to inspire is why the S1 Pro+ Wireless Pa System is for you. It's the go-to powerful, portable, all-in-one portable Pa speaker for live performance. The power of Pro Sound With more powerful performance, S1 Pro+ gets even louder than its predecessor. So you can be a vibe any time you bring this portable Pa system to a gig. An integrated 3-channel mixer lets you bring the loud: Channels 1 and 2 for mics and instruments Channel 3 for Bluetooth streaming or Aux input Bring It Here. There. Everywhere Portable with a handle, it's easy to go from your car to the curb to the venue - if it's the neighborhood bar or your neighbor's backyard.