thanks KK and william, the course is very interesting & i've learn a lot.
i would like to modifly my power amp. any course & 補品 can provide?(such as jension cap)
the pre is very good and need to say thanks KK & william again.
I have connected SP 10 to my system last night. The sound coming out is very musical. I have learned a lot from the course and wish to say thank to KK sir.