This is a first-model Sherwood S-5000 stereo integrated amplifier. It has been thoroughly rebuilt by Mr Craig Ostby of NOS Valves. Signal caps, power supply (high voltage and heater/bias supply) have been replaced, and an external top deck bias control and adjustment system has been installed, so it's easy to adjust bias on this unit. The output tube sockets were not replaced, so the EL-84 tube pins need around 5/32 of heat shrink tubing at the top of each pin, which I have done. This is being sold as a parts/repair unit, there is a tube rushing sound from both speakers, so this does need repair. I accept payment thru express checkout. I ship to the U.S. only. Will be double boxed. Directions for the bias control will be included.