I have the A3 and the XA1.The "family" sound is evident.They are very very quiet in terms of background noise-it is TOTALLY nonexistent.The bass is softer,with the xa1,probably because of the reduced power,and my speaker's (Alon II) 10" woofer,than with the A3.If I have a criticism,in comparison to much more expensive amps,they seem "softer",with less cutting transients,than the very best amps.
