Specifications

Headphones

Configuration Open-back, circumaural type
Transducer 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
Input 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
Weight 303 grams (10.7 oz), without cable

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
DAC Dual mono, 32-bit/384 kHz DACs with balanced outputs
ADC 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
Amplifier/Energizer Discrete FET, single-ended, high-bias Class-A output
Distortion + Noise < 0.05%
Bandwidth > 65 kHz
Enclosure CNC-machined 6063 aluminum
Power Supply External: 24 VDC, 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 H x W x D: 57 mm (2.24 in) x 190 mm (7.48 in) x 290 mm (11.42 in)
Weight 2.45 kg (5.40 lbs)