Hi! I have used 2 Bose S1's as well, and it has been really great so far. Very clean, loud if needed. I even had to slightly reduce the bass since they are surprisingly bass-strong. Very clear sound. I have never heard them clip. I have used them mostly in rooms for up to ~100 people. I tried using just 1, but when I used 2, the sound really opened up and sounded much better (stereo) as I wrote in a separate note.
This is with Tyros5 initially, and now with Genos.
Jim
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Genos / Tyros5 / HK Lucas Nano 600 / FTB Maxx 40a / EV ZX1A / Rock'n'Roller cart / Hauptwerk virtual pipe organ / misc other audio & music toys