Sonoma Model One Electrostatic Headphone System - Ex-Demonstration

Special Price £3,495.00 Regular Price £4,995.00
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Ex-Demonstration - Very Good Condition - Original Box and All Accessories - Comes with Full Manufacturers Warranty

Ex-Demonstration - Very Good Condition - Original Box and All Accessories - Comes with Full Manufacturers Warranty

HPEL Transducer


The ideal loudspeaker transducer would have zero mass, respond infinitely quickly to any signal, be perfectly damped, have no distortion and be perfectly linear. Until now, the technology that best exemplifies those characteristics is electrostatic. Introduced almost 60 years ago, electrostatic headphones have remained the choice of discerning listeners who demand the highest audio quality. Now, a revolutionary new electrostatic transducer, derived from the world of ultrasonics, has been developed in the UK by Warwick Audio Technologies Ltd. (WAT). The patented High-Precision Electrostatic Laminate (HPEL) audio transducer ushers in a new paradigm in the field of electrostatic drivers, and the Sonoma M1 is the first headphone system in the world to use it.

A conventional electrostatic transducer consists of a thin membrane (coated with a conductive material) between two electrically conducting metal grids. There is a small gap between the membrane and grids. The membrane is kept at a high DC potential relative to the grids, and the audio signal is applied across the grids. This results in the membrane moving in response to the audio signal thus creating sound. Clearly, in order for the sound to propagate through the grid/membrane ‘sandwich’, the grids have to be perforated in some way.

In contrast, the HPEL uses a thin (15 μm – less than the thickness of a human hair), flexible laminated film for the ‘front’ grid. The laminate is affixed to the open (cell) structure of an insulating spacer (made of Formex™), and the film is very accurately machine-tensioned in the x-y plane. In this way, small ‘drum-skins’ are created by the cells. A stainless steel mesh forms the ‘back’ grid. When the audio signal is superimposed on a 1350 V DC bias voltage, the ‘drum-skins’ formed by the flexible ‘front’ grid vibrate, producing sound. Unlike a traditional electrostatic panel, the sound you hear from a HPEL does not pass through a grid! To take full advantage of this feature, everything has been done in the design of the M1 to keep the areas in front of and behind the transducer as clear as possible so as not to impede the sound waves.

Injected Magnesium Ear-Cups
With excellent strength-to-weight ratio, high stiffness, superior acoustical dampening and outstanding RFI/EMI shielding, magnesium is the perfect material in which to house the HPEL to ensure optimal performance. Low weight also contributes to outstanding headphone comfort.

Handmade Cabretta Sheepskin Ear-Pads
To ensure your comfort during long listening sessions, our ear-pads and headband are handmade from the finest Cabretta sheepskin leather, known for its light weight, durability and softness.

Custom Low-Capacitance Cable
In collaboration with Straight Wire inc, we have developed a special ultra-low capacitance cable with high precision, self-latching connectors to guarantee ideal signal transfer between amplifier and headphone.

ESS Sabre Reference DAC
Two stereo DAC chips from ESS, the world’s premier DAC chip manufacturer, are operated in mono mode to provide a measured 129 dB signal-to-noise ratio.

Precision CNC-Machined Aluminium Case
A precision CNC-machined, solid aluminum case not only creates a beautiful housing, but provides outstanding isolation from external interference sources.

Class-A Energizing Amplifier
A discrete, single-ended FET Class-A amplifier provides a high-performance, wide-bandwidth, very low distortion final drive stage, optimally matched to the HPELs.

Custom 64-bit DSP
All input signals are digitally processed using custom 64-bit double-precision fixed-point arithmetic. Fixed-point is known to be superior in the world of audio processing, and our 64‑bit arithmetic exceeds the performance of most professional audio workstations.

Model One Warranty
HPEL Transducers / HEadphones / Energizer-DAC - 2 Years
Ear Pads / Headband / Cables - 1 Year

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

DAC & Energizer
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)
Book a Demo - Sonoma Model One Electrostatic Headphone System - Ex-Demonstration

Nintronics offers generous trade in prices to help make your next upgrade as seamless as possible, while greatly reducing the overall price of your purchase. Depending upon the items involved, Nintronics will be happy to send out one of our nationwide installation engineers to collect your traded in items and unbox, setup and calibrate your new equipment.



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