I am using a Chinese-made, PopPulse T180 amplifier, this has 4 switchable OP amps. Unfortunately, I only have only a pair of V6 Classics in it, but hopefully, I can fill the other two sockets one day. I really love the analog, smooth yet rich, and detailed sound this amp gives with the Bursons in it. I had much expensive gear in the past, but none of them compares to this. Thanks for such an excellent product! Keep up the good work!