The system has had good burn in time, and this combo is just stunning. The amps provide enough speed, and just the right amount of power to allow the 1.7 to sing in the midrange. For me speakers live and die in the Midrange, and this amp is not only warmer than any Class D amp has to be but does not add its own flavor to the music. It is very transparent. I love tubes but the low power and they can sometimes darken the sound. This amp provides all that you love about tubes with out the drawbacks. Digital amps have come all the way and Cherry has the best Digital amp I have ever plugged in. And I have been reviewing amps for over 10 years.