DYNACO 400 STEREO POWER AMPLIFIER - SERVICED - CLEANED - TESTED. 200 WPC, 600 WATTS IN MONO. THIS STEREO POWER AMPLIFIER WORKS GREAT AND IS IN VERY GOOD CONDITION INSIDE AND OUT. WE REPLACED ANY DEFECTIVE CAPACITORS AND ANY OTHER DEFECTIVE COMPONENTS. INSTALLED NEW LAMPS. REPAIRED ALL POOR SOLDER CONNECTIONS. (WE HAVE BEEN IN BUSINESS FOR OVER 60 YEARS REPAIRING VINTAGE AUDIO EQUIPMENT.) IF YOU HAVE ANY CONCERNS, PLEASE CONTACT US PRIOR TO YOUR PURCHASE.