Cayin TA-30 integrated amplifier with all the Bizzy Bee mods done by Paul Grzybek. No one else ever touched the inside. 30 watts per channel. Can use KT88 or EL34 output tubes. I'm selling this for my brother, who is the original owner and bought it from Paul. It has seen very little use over the years and sounds wonderful. It could probably use a re-tube as I'm unsure how many hours they have on them. Again, it sounds great when I tested it off and on for a week. The input tubes are Electroharmonix 12AX7 and RCA orange label 12AU7's. Output tubes are stock Cayin. The mods that Paul performed were the "focus" knob, which is variable negative feedback. External bias controls. Auricap coupling caps and a subwoofer out on the back. There are chips in the powder coat of the enclosure and a nick on the top of the faceplate. Another nice feature of these amps is two of the tubes can be pulled, the output tubes re-biased and the amp run in single ended mode. There is quite a lot of information on the web regarding this amplifier. http://www.goodsound.com/equipment/cayin_ta_30.htm
The amplifier will ship in the original factory double box. I do not have a owner's manual, but biasing information can be found on-line. $650 plus $50 shipping.