Free UK DeliveryFinance at checkout30 Day ReturnsWorldwide DeliveryAudio Affair Facebook

Warehouse Clearance

Warwick Acoustics Sonoma Model One Headphones System


. 0 Reviews . Write a Review

Enquiry/price check? Click here SKU: SONMDN
Ex VAT: £4,162.50
Sonoma M1 Headphone System, made for today's high-res formats, uses a HPEL Transducer and delivers audio performance without compromise.

Available - Usually ships within 2-3 days

Condition: Brand new in original retail packaging

Earn 4995 loyalty points when you order this item.

You can earn loyalty points on every order you place on this website. If you select to create an account at checkout, your loyalty points will be saved and you can use these to discount future orders online. 


Each product page shows you how many loyalty points you can earn when you order that item. Essentially, for each £1 you spend, you earn 1 loyalty point and for every 1 point earned, 1p will be added to your loyalty point balance (this is the same as some of the UK's biggest loyalty point cards). So for example, if you spend £500, you'll earn 500 loyalty points which can be used to discount a future order by £5.00. 


Read more

Get a trade in quote

To reduce the price of this item, we may be able to accept your old equipment as a trade in (part exchange).

Please send us your details along with details of the item(s) you'd like to trade in and we'll come back to you within 2 working days (but usually a little sooner) with a quote.

Send us a message now

Do you have any questions on this item you'd like us to answer? Or have you seen it cheaper elsewhere and would like us to see if we can beat it? Send us the details below and we'll come back to you quickly (usually within 24hrs, sooner during opening hours)


Warranty length 2 Years
Fitting Over Ear
Brand Warwick Acoustics

Tech Specs


- Type: Open-back, circumaural
- HPEL Drive: single-end electrostatic
- Effective Diaphragm: 3570 mm2
- Frequency Response: 10 Hz – 60 kHz
- Compliant: EN 60065/A12:2011 (EN50332)
- Cushions: Cabretta top-grain sheepskin
- In: Polarized, 4-pin for L/R channels
- Drive Cable: 2m Ultra-low capacitance
- Cable: silver-plated OFHC copper
- Insulation: foam PE/Kevlar reinforce
- Weight: 303 grams (10.7oz)


- USB In: B (32/384kHz /DSD via DoP)
- Dig Coax In: S/PDIF (24/192kHz PCM)
- Analog In (High): Dual RCA; 2.1V rms
- Analog In (Low): 3.5mm; 850mV rms
- DAC: Dual mono, 32-bit/384kHz
- ADC: 32-bit/384kHz multi-channel
- DSP: 64-bit fixed-point processing
- Amp: Discrete FET, single-ended
- Amp Out: High-bias Class-A output
- Distortion + Noise: < 0.05%
- Bandwidth: > 65 kHz
- Enclosure: CNC-machined 6063 aluminum
- Ext Power: 24V DC, 60V A (fixed, class B)
- Int Power: Fully isolated, ULN linear
- AC: World (90-264V, 50-60Hz)
- Power Cable: 1.5m earth-ground
- Dimensions (HWD): 57 x 190 x 290mm
- Weight: 2.45kg (5.40 lbs)

Product Description

Warwick Acoustics (Sonoma) Model One Headphone System is built for today’s high-res audio formats with each piece planned to carry unsurpassed heights of performance and acoustic quality. It is the world's first Headphone System to benefit from the ‘High-Precision Electrostatic Laminate’ (HPEL) Transducer developed by Warwick Audio Technologies Ltd.

New Transducer

The first headphone in the world to use a patented HPEL audio transducer, a new architype of electrostatic drivers. Standard transducers use a membrane moving in response to the signal to create sound. HPEL uses a 15μm flexible laminated film, thinner than a human hair, for the ‘front’ grid with a stainless-steel mesh for the ‘back’ grid. When audio is overlaid on a bias voltage, the ‘drum-skins’ resonate producing sound. HPEL does not pass through a grid.

Finite Element Analysis

Patented Finite-Element Analysis refines the properties of the ‘drum-skins’ for various resonant frequencies. The individual resonances average out, evading significant interference peaks in the audio band. 

HPEL has supreme transient performance and its surface area is optimised to carry a full frequency response. HPEL delivers unheard of consistency and matching between left and right channels. A super-rigid, high glass-fill polycarbonate ‘cassette’ optimises transducer performance.

Injected Magnesium Ear-Cups

Merging great strength/weight ratio, rigidity and EMI/RFI shielding, Magnesium ensures optimum performance of the transducer. It is roughly ⅓ lighter than aluminium, contributing to outstanding comfort and incredible acoustic damping. The ear-cups are formed by accurate and high-pressure injection moulding lending to ultra comfort. For strength and corrosion resistance, only high-grade stainless-steel screws and fasteners are used.

Custom Low-Capacitance Cable

Partnering with the specialists at Straight Wire Inc, a revolutionary wire design was created for the M1. The cable features very fine strands of silver-plated OFHC ultra-pure copper. The foamed PE insulation has a suitably high dielectric constant and is well damped.

A fibre filler material in the jacket keeps the conductors as far apart as possible. The cable capacitance is a low 50 pF/m. The jack is electrically isolated from the amplifier chassis, while the headphones high-precision self-latching connectors ensure a secure connection. An integrated sense loop runs to each ear cup.

Energiser & DAC

HPEL is driven by a high-performance, single-ended, discrete FET Class-A amplifier with very low distortion and optimally matched wide bandwidth. The Class-A output stage works at a superior bias level giving an ultra-high slew-rate and better linearity.

The high voltages mean significant power, in spite of low current, at the amplifier output. Consequently, high quality devices used throughout are designed to cope with the power levels. The amplifier provides inputs for USB, coaxial S/PDIF, dual high-level RCA jacks and low-level 3.5mm stereo jack.


Sonoma M1 system was developed to deliver true high-resolution performance. For the critical D/A conversion stage, they turned to an established leader in the field; ESS Technology. Sonoma opted for the Reference 32-bit DAC. Twin stereo DAC chips feature in a special mono mode to offer a signal/noise ratio of 129dB.

64-bit Fixed DSP

A flat frequency response is incredibly difficult to attain with a headphone. HRTF gives rise to a non-flat frequency response and changes depending on the sound direction. All filter responses within the DSP are minimum-phase, slow roll-off and are optimised for excellent time-domain response.

Further profiting from the extraordinary accuracy of the 64-bit DSP, Sonoma implements a wholly-digital interpolated volume control which drastically exceeds all the full analogue, step attenuators tested. The result is zero fidelity or dynamic range loss, seamless matching of left and right channels, eliminated noise issues and no non-linearities in the potentiometer.

AKM 32‑bit Premium ADC

For the DSP to attain the marked frequency response, inbound analogue frequencies need to be changed to digital signals. This happens in a multi-channel 32-bit AKM Analogue to Digital Converter chip. Two unbiased, fully-optimised ADC signal paths are used each for the high or low-level inputs. In this way, the full dynamic range capability of the ADC is achieved regardless of the input selected. 

Nylon 12 Headband

Nylon 12 not only naturally dampens noise, but is extremely hardwearing and flexible allowing perfect adjustment to almost any head size. The headbands internals are comprised of stainless steel with vapor-deposited titanium coating to ensure durability and smooth operation.

The handmade Cabretta leather used is sourced from Ethiopia and handsewn by specialists in Germany. Ultimate listening is ensured by use of top-grain sheepskin known for softness, strength and flexibility.

Crystek Oscillator

The ultimate performance of any digital system is determined by the quality of its master-clock. Sonoma Model One is based around the ULN Crystek oscillator ensuring optimum performance whatever the input. On top of 100MHz operation, it has an ultra-low <90dB/Hz phase noise and industry-leading 82fms jitter level. Clocks used throughout are all taken from this greatly accurate lead oscillator through a complex distribution method using TI frequency dividers.

Optimum PCB Layout

In design, careful attention was granted to the arrangement of the circuit board to ensure minimal noise and distortion standards. Meticulous positioning of components enabled Sonoma to maintain an extremely low noise-floor of -129dB!

CNC-Machined Aluminum

Starting with a solid billet of high purity Aluminum 6063, the material is first extruded, and then CNC-machined to produce a shallow U-shape comprising the base and side walls of the amplifier. The metal walls which remain are 5/16th of an inch thick.

A top-plate of the same thickness, along with ½” thick end-plates form the complete enclosure. A special 3D-wave pattern is cut into the base and top-plate to facilitate heat dissipation. For desired metal finish, the parts are blasted under high pressure with fine glass beads then clear anodised. All logos and labels are laser-etched into the metal.

Superior USB Cable

As USB is the only connection which takes all the supported high-res digital audio formats, it was vital to ensure no compromise in performance when using this connection. The supplied USB cable was developed in collaboration with Straight Wire Inc. Featuring gold-plated connectors and a silver-plated data path, it is the ideal connection between your digital music source and the Sonoma M1 system.

Custom Universal PSU

M1 uses a two-part power solution in order to keep as much noise as possible out of the sensitive audio path. The first-stage involves a custom-designed, universal voltage, outboard switch-mode power supply unit. To avoid any headroom issues, the device is capable of delivering about 3.5 times the maximum power the amplifier is designed to draw under steady-state conditions.

Fixed Frequency Switcher

In addition, the unit uses a fixed frequency-switcher (over 85kHz) to avoid the possibility of the switching-frequency dropping into the audio band as the power draw changes. To ensure an ideal connection, it is fitted with a high-performance, Switchcraft locking DC power connector. A massive ferrite core filter has been added to the DC cable to reduce EMI.

Write Your Own Review

Write a Review

  • 1 star 2 stars 3 stars 4 stars 5 stars
    1 Star 2 Star 3 Star 4 Star 5 Star


Contact Details

Customer Services Landline
0121 224 7350/7351

Sales Landline
0121 224 7300/7401

Sales WhatsApp
07706 203859

As Featured/Seen In

The Telegraph
Gadget Show
BBC Midlands Today
Birmingham Mail
Hi-Fi Choice Magazine

Mobile Site

Copyright © Audio Affair (Alexander Michael LTD) 2006-2024. Vat No. 913183835. All rights reserved.