For restaurant work, my Yamaha MS-60S were perfect....being monitors, they didn't throw the sound too far, and those not wanting to sit in the music area could find a spot where the music was low. They are relatively light at about 20 lbs each.

For doing a concert setting in a theater, I rented two Bose Standard L1's with subs and they worked perfectly, the people seated in back getting almost the same volume and quality as those in front. And, no need for monitors. Set up time was longer, but I allowed for it.

I must say, the Nano 300 looks very interesting, and would make a nice stereo system for restaurant work, but maybe not enough spread and distance for a theater setting.

Certainly a very clever design, and a great price too.

Ian