I have tried Diamond 12.2 with SMSL DO100 & PA5, SMSL AO100 & DO100, SU6 & DA6, Loxjie A30, TEMPOTEC SONATA HD PRO & Aiyima A07. I would say there is no significant difference. The difference in those amp are in bass roll-off (~1 dB), high frequency (~0.7 dB), and THD+N, which hardly audible for...