SR-1 - Overview
The first electrostatic headphone in world, debuted at a Tokyo show in 1959 and put into production in 1960. There were a number of different versions as the product evolved over its 8 year life span. Amongst the changes was a move from a 150VDC bias to 200VDC (which Stax used until 1977) and a new earpad design. There were at least three know versions but due to the age and rarity of the SR-1 it is difficult to pinpoint what the difference between each version was.
General Description of the Sound
Pricing & Other Data of Interest
Transducer shape: Round
Electrode type: Perforated copper plate
Diaphragm thickness (micron): High polymer film, 6um ?
Electrode gap: 0.3 mm
Bias Voltage: 150V --> 200V
Impedance: 130k ohms
Frequency Response: 30Hz - 25KHz
Signal cord: 6-core with a fabric cover.
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