Stax SRD-7 Energizer / PWB Electrostatic Headphones
Serial Number: 5172
Packaging & Accessories:
Stax SRD-7 Energizer / PWB Electrostatic Headphones is backordered and will ship as soon as it is back in stock.
This listing comprises a vintage Stax SRD-7 speaker-level energiser/adaptor paired with PWB (Peter Walker Brown) electrostatic headphones — a rare collector's combination. Supplied in original packaging (no packaging for the headphones), with manual. Please note: there is a little bit of wear on the headphones. The SRD-7 draws power from a speaker amplifier's output terminals, converting speaker-level signal to the high voltage required to drive electrostatic headphones. Headfonia noted the SRD-7 'runs great out of any vintage stereo receiver' and praised the transparency and resolution that Stax electrostatics deliver. The SRD-7 was produced from the early 1970s through to the mid-1990s and remains a popular affordable gateway into Stax electrostatic listening.
As always, our usual warranty applies to give you peace of mind.
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Specifications
Specifications
Type: Speaker-level electrostatic headphone energiser/adaptor (transformer-based)
Input: Speaker binding posts (connects to amplifier speaker outputs)
Output: 6-pin Normal Bias Stax connector (230V bias)
Note: Normal Bias version — compatible with Standard Bias Stax earspeakers only
Dimensions: approx. 120×70×200mm
Power consumption: ~0.1W (AC mains required separately for bias voltage)
Front panel: Combined on/off switch; passes speaker signal through when switched off
Production period: 1971–1995 (various variants)
Made in Japan
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Delivery and Shipping
Delivery and Shipping
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