Hello @honeyooi ,

Very fine system!

I have owned Harbeth M30.1, like you. I have upgraded towards M30.2 Anniversary (magnificent).

About the AirTight ATM-2: there is one to sell not far from my place, 1st owner. Don't know the amplifier's age. Air Tight has good reputation, BUT

a) I read that many report the 'tube blown' issue. Then you have to replace the fuse, and it must be soldered (?!). If it has to be serviced, it weights 32Kg!!

b) the ATM-2 is discontinued.

c) the "front-input-is-better" weird thing is, well...weird. There are attenators; is it worth using it without preamp?

At present I have a Marantz PM-16 and a NuPrime AMG-STA class A preamp, and AMG-PRA power amp (130w stereo, class A+D); very fine little combo. I listen mainly to classical, large room and very good acoustic, no neighbors.

Thanks!