I've tried the Bose S1 Pro and found it inadequate for my PSR S975. The Bose does not do well with stereo sampled voices, especially piano (which I use a lot). Also each venue is different, so I had to get up from my chair and adjust the knobs several times. That caused me to buy a small mixer, some more stuff to carry and worry about. So I stuck with my Fender 250 with multi directional speakers. The Fender mixer is always close by and no need to get up and adjust. Can do that on the fly while playing. My $0.02