I sold my pair of Nano 300 speakers and bought the Nano 600 over a year ago. I think the sound quality of the two small speakers
in the 600 are superior to those of the 300. Of course you have
more power in the amps. and the speakers are "baffled" so the sound is spread over a wide spectrum.

Both the 300 and the 600 are fine units. Bought both the 300 and the 600 from Frank at Audioworks.ct Lloyd