I started my post with: "This amp is only suitable for small commercial spaces."I've seen lots of small stores with just a handful of speakers in the ceiling and the volume not turned up very high. Smaller stores today are using Heos or Sonos or even Bluetooth speakers. It is commonplace in the USA to have some music in stores, even if it is low volume in the background.
So I don't see why 30W per channel would work fine even in a medium sized store at lower volume.