FS: NITSCH PIETY headphone amp. About 20 hours of use. In mint condition as received and works perfectly. No noise when the volume pot is turned. There is a tiny dark spot on the right front side of the top panel that was there when I received it. Have the original box and power supply. Will be double boxed for shipping. Asking price includes PayPal fee and shipping with USPS Priority Mail to the continental USA. PM me with any questions.