He bought only Tonewinner power amp not the processor.I am a bit confused, have you got the AT 300 Pre Pro or the AVR by Tonewinner?
I don't think the AT 300 comes with a calibration mic, one has to purchase it separately or use something like UMIK. And it doesn't have Audyssey, which is used by Marantz and Denon.
It does have some calibration but don't know how it works. Good thing about AT300 was it has individual 11 band EQ.
Do share some pictures and how easy is the whole process of getting it hooked up and calibrated. Since there is almost no data on this online.
Someone from the group buy can post the initial impressions of Tonewinner processor