Offered for sale by original and only owner/user since 1972. Sold by Tasso at Opus One in Pittsburgh, serviced by Bill Carnell and lately by thestereodoctors dot com, most recently in 2015 at which time performance was (and remains) to spec. In use since new, needs nothing. Complete with both inner and outer shipping boxes and styrofoam supports. Outer shipping box shows wear and tear. Also provided are two original numbered Marantz Audio Analysis Program reports from 1972 and 1973 showing THD and output wattage and voltage, original owner's manual and WC-22 walnut cabinet (veneer repair-see photo). Condition is excellent in appearance and performance. Auditions are welcome. PayPal is OK if buyer pays PP fee.