Yes, well spotted; it is a PC2602M, pro-amp. Cary pre/proc. (or Krell HTS7,1, or Krell KRC-2, or...) gets the signal from a Transporter or Yamaha NP-S303 streamer, both soon to be replaced by Raspberry/HiFiberry Digi-something...also waiting for a Topping D50 to complement a diy-dac