This system is set up in the family room of an old century stone home[circa 1850]The original servo otl'amplifiers that supply the panels have been completely redone with top shelf quality passive parts, and selected for audio circuits.Every resistor,capacitor,tube socket, and contact from the input to the output has been updated.These amps are used to power my 2+2's or my custom 3 panels.The custom frames for the 3 panels were made from solid oak and raise the panel to the optimum 14"'s from the floor and provide the structural rigidity that all e-stats need to sound their best.Most elactrostatics love tubes,OTL tube amps even more.These highly modified servo amps bettered the Atma-shere 2.2 mk2's on the acoustat!Mind you I could only run the atmas through the medallion transformers for comparison.Any one owning acoustat should seek out these old x-servos and update them.These are truly world class andwill rival most any e-stat out there regardless of price.