It dates back to the mid-1970's and was an early Nelson Pass design. ESS was an electrostatic loudspeaker company back then, but discontinued their use when they introduced the Heil Air Motion Transformer. An amp that old is going to require electrolytic capacitor replacement.
ESS Eclipse 500 Amp??
Anyone hear of this amp?>
It is told to be good for Electrostats..I really need info here..thanks Chad
It is told to be good for Electrostats..I really need info here..thanks Chad