Trying to decide on a Precision 2 to mate to my Master-9 to power my speakers. I wrote to Kingwa and this was his answer :
The Precision 2 had the pure amp input, can connect the Master 9 without any problems.
If you have the P2, you can try to compare below two connection modes see which is better for you.
1, M9 to P2 (pure amp input via RCA , volume control on the M9.
2, M9 to P2( ACSS input, setting the M9 volume on around 50, volume control on the P2)