ESS

Phase I

Headphones

Main Details
Maker ESS Brand
Function
Additional Model ID Mk I
Channels/Tracks
  • 2 × Channel
Form Factor Headphone - Circumaural
Signal Path Passive Hardware
Made In United States
Weight 14oz
Frequency Response 20Hz-50kHz
Notes Early Mark I headphones distributed for review before renaming for broader release.
Additional Specifications
Driver Type Heil Air-Motion Transformer (AMT)
Type Open-Back
Impedance 32Ω
Sensitivity (1mW) 35dB
Distortion (1kHz, 90dB) 0.3%
Square Wave Rise Time (5kHz) 15µS
Maximum Input 14V
MSRP (1976) $97

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