Devialet Expert 440 Pro Dual


Expert 440 Pro is the ultimate audiophile system – for the most discerning of music lovers – Well above and beyond an ordinary amplifier

Usually delivered in 7-10 days

SKU: Devialet Expert 440 Pro Dual Categories: , , Tags: , , ,

Devialet Expert 440 Pro Dual

Devialet Expert 440 Pro

The ultimate audiophile system

As of June 2023 new finish will be Matte Graphite Grey

Expert Pro is the ultimate audiophile system, for the most discerning of music lovers.

Well above and beyond an ordinary amplifier,

Devialet reinvents and combines for the first time all of the key components of expert playback (preamplifier, amplifier, DAC, streamer, phono stage) in a dual and extremely thin slab.

Your Expert 440 Pro is unlike any other: set each of the thousands of possible configurations for a unique musical experience.

Regardless of the source. Regardless of the speakers

Dual-Mono · 2x440Watts 6Ω

Exceptional architecture and performance.

The Dual-Mono Expert 440 Pro configuration is able to achieve new heights in performance, in particular with a distortion divided by 2 compared to the stereo system, more power for each channel and an extreme variety of connectors for the most demanding acoustic architectures.

The Expert 440 Pro includes all Devialet exclusive technologies as well as major innovations developed for the new Expert Pro range.

THD+N : 0,00025% (440W / 6Ω)

THD : 0,0001% (10W / 6Ω)

Signal-to-Noise ratio: 133dB

Advanced Phono stage

New ADH Intelligence®

Expert Pro : The world’s best performance, at all power levels




•   Power : 2x440WRMS 6Ω

•   Signal-to-Noise ratio : 133dB

•   THD – 130W/6Ω : 0,00025% / -112dB

•   THD – 10W/6Ω : 0,0001% / -120dB

•   Output impedance : 0,001Ω

•   Damping factor : 8000

•   Bandwidth :

◦   DC-30kHz (-0.1dB)

◦   DC-95kHz (-3dB)

•   Phase :

◦   0.2° at 20kHz

◦   0.9° at 40kHz

•   Thermal distortion : Below measurement threshold

•   Technologies : ADHV2®, SAM®, AIR®, EVO®, DAC Magic Wire®, RAM®

•   Intelligence :

◦    3 x SHARC 400 MHz DSP’s

◦    1 x 16 MHz RISC processor

◦    4 x 40 MHz RISC processors

◦    1 x 64 MHz RISC processor

•   Synchronisation : Up to 8 units


•   Wi-Fi :

◦   2.4GHz 802.11 b/g/n Wi-Fi input for the Devialet AIR universal streamer

◦   Supported formats: 16-bit/44.1 kHz PCM to 24-bit/192 kHz PCM

•   Ethernet RJ45 :

◦     RJ45 10/100 Mbps Ethernet input for the Devialet AIR universal streamer

◦     Supported formats: 16-bit/44.1 kHz PCM to 24-bit/192 kHz PCM

•   USB :

◦      USB Audio 2.0 asynchronous input/output

◦      Supported formats:

▪      16-bit/44.1 kHz PCM to 32-bit/192 kHz PCM

▪      DSD64 1bit/2.822400MHz and 1bit/3.072000MH

◦      Supported formats:

▪      Very low latency

▪     Bi-directionality for digitisation of the active source

•   S/PDIF TOSLINK optical connector : Supported formats :  16-bit/44.1 kHz PCM to 24-bit/192 kHz PCM

•   3.5mm mini-jack S/PDIF optical + RS232 connector :

◦    Supported formats: 16-bit/44.1 kHz to 24-bit/96 kHz

◦    Device control via the bidirectional RS232 protocol up to 115200 bauds (documentation available via the configurator)

•    RCA 1 & RCA 2 connector (selected via the configurator) :

◦      1 or 2 coaxial S/PDIF digital inputs

▪       Supported formats:

▪       16-bit/44.1 kHz PCM to 24-bit/192 kHz PCM

▪      DSD64 1bit/2.822400MHz and 1bit/3.072000MHz

◦     1 S/PDIF coaxial (RCA1) digital output

▪     Supported formats: PCM 24bits/48kHz/96kHz/192kHz

▪     Multi-room use and monitoring loop

◦     Pre-amplified analogue output

▪     Fixed or variable volume

▪     Output level up to 4 VRMS

▪     Stereo/mono/left/right mixing

▪     Active filtering available

▪      WM8740 D/A convertor operating at 24 bits/192 kHz

▪     Compatible with subwoofer, headphone amplifier, monitoring loop

▪     May be activated / deactivated via remote control

•    RCA 3 & RCA 4 connectors (selected via the configurator) :

◦     Line-in stereo analogue input

▪      24-bit/96 kHz or 24-bit/192 kHz sampling

▪      T.I. PCM4202 A/D convertor

▪     Accepts voltages up to +/- 10V

▪     Maximum recommended level: 4 VRMS

◦     Analog input stereo phono level

▪     16-bit/44.1 kHz PCM to 24-bit/192 kHz PCM

▪     T.I. PCM4202 A/D convertor

▪    Accepts voltages up to +/- 100mV

▪    Maximum recommended level: 15mVRMS

▪    Advanced conversion stage

•   1 or 2 coaxial S/PDIF digital inputs

◦   Supported formats:

▪    16-bit/44.1 kHz PCM to 24-bit/192 kHz PCM

▪   DSD64 1bit/2.822400MHz and 1bit/3.072000MHz

•   Mini-jack 3.5mm : 3.5mm mini-jack trigger connector

•   Speaker output :

◦   4mm banana plugs, stripped cables or fork connectors

◦  Adjustable from 30 WRMS to 440 WRMS via the configurator

◦  Compatible with all speakers, from 1Ω to 16Ω

◦  Short-circuit protection

◦  Active filtering available

◦  Output impedance: 0.001Ω


•   Type of supported cartridges: MM/MC

•   MM sensitivity from 1mVRMS to 15mVRMS

•   MC sensitivity from 100 μVRMS to 5000 μVRMS

•   256 combinations for the resistive/capacitive loading of the cartridge

•   Stereo/mono/left/right mixing

•   13 equalisation curves available

•   Specific menu for dynamic adjustment of all these settings


•   Patented Magic Wire Digital / Analogue Converter, D/A T.I. PCM1792

•   Unique high-precision MasterClock with very low jitter: 2ps RMS

•   Conversion of all inputs into 24-bit/192 kHz

•   Built-in DSD / PCM conversion

•   SAM profile via configurator allowing the precise adaptation of the sound signal to the specifications of your speakers

•   Available active filtering on all analogue outputs via configurator

•   Volume control in increments of 0.5 dB

•   Volume adjustment range: -97.5 dB to +30.0 dB

•   Bypass/pass-thru mode available input by input

•   Balance adjustment

•   Tone control: bass +/-18 dB, treble +/-18 dB with variable frequency cut-off via configurator



•   Chassis carved out of a single aluminium block

•   Dark chrome finish

•   Hand polishing, unique piece

•   Dimensions: 114mm x 114mm x 43mm  (l, w, h)

•   Weight: 568g (without batteries)

•   Requires 2 AAA batteries (1.5V LR03), provided – service life of a set of batteries: 5 years

•   No pairing required

•   Ultra responsive, latency < 3ms


•   Universal 90-240Vac – 50/60Hz

•   Power cable provided adapted to the country

•   Patented single stage switching mode topology

•   High power level: 600W continuous, 4000W peak

•   High output with power factor correction (PFC)

•   High resiliency to hazards potentially encountered on distribution networks : brownouts, quick transients, overloads

•   PLC Compatible


•   2 Devialet Expert 440 Pro

◦   1 Master unit

◦   1 Companion unit

•   2 AudioQuest Power cables

•   1 User Manual

•   1 Warranty booklets (5 years)

•   1 Companion booklet

•   1 Master booklet

•   2 Microfibre cloth

•   2 Pairs of gloves

•   2 SD cards

•   1 Remote Expert (3 AAA batteries LR03 1,5V provided)








In the world of sound, there is a striking paradox:

While Music has never been so accessible in terms of volume, the quality of the sound itself, and the way technologies manage to restitute it, remains questionable.

The purity and thousands of details that make music what it is, continue to elude us.

Devialet was born in 2007, as a response to that very issue.

Their goal: making it possible for a larger number of people to listen to perfectly restituted sound using everyday sound devices. Simple enough, come to think of it!

All their teams are hard at work, turning an insane ambition into an extremely concrete reality.

Step by step, we have sparked a real technological revolution in the audio world that got in motion thanks to some radical innovations.

Since their creation, they have registered 200+ patents.

Devialet’s DNA finds its source in the influence of philosophers from the Enlightenment era.

theirr name is a reference to engineer Guillaume Vialet, a companion of Diderot and contributor to the French Encyclopedia. Vialet is widely known as one the intellectuals who, through their intellectual, cultural and scientific commitment, contributed to the betterment of the world.


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.