Quad ESL 57 (restored by One Thing Audio ) Electrostatic Speakers excelllent condition, great sound come with Rupert stands pictures to follow

One Thing Audio UK Internal ESL57 Power Supply / EHT Unit I bought 4 of these but never got round to fitting them so they are brand new and unused. This PSU / EHT unit is based on the original RBT board but has been made to include a new PCB transformer, 110VAC tapings and has the new voltage dropping circuit which reduces the overall EHT voltages for use with the new OTA 57 panels and speakers in higher humidity locations. The unit is made from steel offering superb rigidity, the pin connections have now been replaced with screw terminals for easier connection by the end user. The input is via a switched, fused, illuminated IEC socket.

One Thing Audio ESL57 external input equalisation widgets. The widget is used for presenting a nice load for solid state amplifiers when driving Quad ESL57 Speakers. In addition, the widget flattens the response of the 57 slightly improving the sound stage. Used but perfect condition, surplus to requirements now.