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  • HiRes AudioTM performance
  • High-performance, single-ended, discrete FET Class-A amplifier
  • ESS SABRE reference DACs
  • 64-bit Fixed-Point Digital Signal Processing
  • Injected magnesium earcups
  • Handmade carbretta sheepskin ear-pads
  • Custom low-capacitance cable
  • HPEL Transducers/Headphones/Energizer DAC - 2 Year Warranty
  • Ear Pads/Headband Pad/Cables - 1 Year Warranty


Open-back, circumaural type


HPEL, single-ended electrostatic

Effective Diaphragm Area

3570 mm2

Frequency Response

10 Hz - 60 kHz

Output Level

Compliant with EN 60065/A12:2011 (EN50332) when driven by M1 Energizer/DAC (for all inputs)

Ear and Headband Cushions

Cabretta top-grain, sheepskin leather


Polarized, 4-pin, self-latching connectors for left and right channels

Drive Cable

Ultra-low capacitance, silver-plated OFHC copper, with foamed PE insulation and Kevlar reinforcement; 2 meter length

Energizer & DAC

USB Input

USB 2.0, type B; accepts digital audio formats up to 32-bit/384 kHz PCM and DSD via DoP (DSD64/DSD128)

Digital Coaxial Input

S/PDIF; accepts digital audio formats up to 24-bit/192 kHz PCM

Analog Input (High Level)

Dual RCA; 2.1 Vrms

Analog Input (Low Level)

3.5 mm; 850 mVrms


Dual mono, 32-bit/384 kHz DACs with balanced outputs


32-bit/384 kHz multi-channel ADC with balanced input buffers

Digital Signal Processing (DSP)

64-bit (double-precision) fixed-point processing at native sample rates


Discrete FET, single-ended, high-bias Class-A output

Distortion + Noise < 0.05%
Bandwidth > 65 kHz
Enclosure CNC-machined 6063 aluminum
Power Supply External: 24VDC , 60 VA, fixed frequency, class B-compliant SMPS; Internal: fully isolated, ultra-low noise linear regulation
AC Mains World voltage compatible (90-264 V, 50-60 Hz); IEC-60320 C14, earth-grounded power cable; 1.5 meter length
Dimensions (HxWxD) (mm) 57 x 190 x 290
Weight 2.45 kg
  • 1x Warwick Acoustics Sonoma Model One Electrostatic Headphone System
  • 1x headphone cable
  • 1x Quick Start Guide (headphone)
  • 1x M1 energizing amplifier/DAC unit
  • 1x universal power supply unit
  • 1x IEC power cord (region-specific)
  • 1x USB cable
  • 1x Quick Start Guide (amplifier)

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