ACOUSTAT X 10 ELECTROSTATIC SPEAKER DIRECT DRIVE TUBE AMPLIFIERS ELECTROSTAT SPEAKER TUBE AMPLIFIERSSurperb Tube Direct Drive for 5,000 volt electrostatic speaker panels. Best possible sound for electrostats, Far superior to transformer interfaces. Overview:Acoustat amplifiers made in USA.Quantity (2) two. Model number X, (10) Ten. Each amp comes with (4) Four 6HB5 vacuum tubes tested 95%.12 spare 6HB5 tubes included, 10 appear New Old Stock, (NOS) . DC polarizing voltage and audio signal output is around 4,850 volts.Can be used with any electrostat speaker using 5KV like Martin Logan. Input connectors, Electrolytic caps, Meg Ohm resistors, IC sockets replaced. Funky EQ circuits were removed as shown, Which greatly improved the sound. Chassis and Covers show scratches and surface rust.Power transformers have heavy rust, Just as we got them 20 years ago. One amp came with a bent corner, We did not try to repair. Good Used condition! Tested Excellent. SHIPPED WITHIN THE 48 STATES. WELL PACKED. WE SHIP UPS. Pay Pal, Master Card, Visa. All items described as accurately as possible so bid with confidence! All vintage gear sold as is. NO INTERNATIONAL SHIPPING. TUBES R US High End, Home Theater, Scientific, Electronic test gear, TUBE Amplifiers and Electronic Parts. SEARCH DOES NOT SHOW ALL ITEMS IN E-BAY STORES. Visit our store~ Track Page Views With Auctivas Counter