DYNACO STETREO 400 POWER AMPLIFIER - SERVICED - CLEANED - TESTED. 400 WATTS PER CHANNEL. THIS VINTAGE STEREO POWER AMPLIFIER WORK GREAT AND IS IN VERY GOOD TO EXCELLENT CONDITION INSIDE AND OUT. WE REPLACED ALL DEFECTIVE CAPACITORS AND ANY OTHER DEFECTIVE COMPONENTS. REPAIRED ALL POOR SOLDER CONNECTIONS. CLEANED ALL CONTROLS AND SWITCHES. (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.