An integral amplifier was located in the base and did require a cooling fan. Electrostatic speakers need high voltages to drive the diaphragm. The amplifier could deliver peak outputs greater than 1500 volt amperes into the speaker’s capacitive load of 5000 pf. Response was claimed to be plus or minus 2 dB from 40 to 15kHz and over a wide angle of 180 degrees.
The lowest useable output was 35 Hz. The system was 6-1/2 feet tall, 2 feet wide and depth was 16 inches at the center with 10 inches at the sides.