- Sep 1, 2010
Even my asus xonar dx could drive HD650 fine. So I'm pretty sure STX will have no problem driving them beautifully. Some people here make way too big deal out of amps when considering hd650. I have audinst mx-1 with matrix m stage with class A biased op627.To be honest, when comparing amp section of mx-1 and m stage it's very minor difference.