It went well, I sold it. Yes, the sound of the HPP1 has a great musical charm. I sold it as I had bought the Hifi-M8. The Hifi-M8 has more power, impedance switches, gain/bass/treble switches. I do miss the Fostex filter switch. I found my unit had a slight channel imbalance before and after servicing, so thats another reason I turned it in.