Devialet Expert 250 Pro


Expert Pro is the world’s most advanced audiophile systems, meant for music lovers in search of a refined and emotional listening experience

Usually delivered in 7-10 days

Devialet Expert 250 Pro

Expert 250 Pro

Expert Pro is the world’s most advanced audiophile systems, meant for music lovers in search of a refined and emotional listening experience.

Designed to replace traditional Hi-Fi systems, Expert Pro delivers all the core elements of playback – preamp, amp, DAC, streamer, phono stage – in a single and ultra-compact unit.

By rethinking sound reproduction at every turn, Devialet engineers have been able to achieve the best performance ever measured, at all power levels.

With a precise and natural attack, explosive dynamics, naked silence and beautifully true timbre, the experience is breathtaking.

Entirely configurable and upgradable, Expert Pro reveals your music’s full potential, whatever the source or speakers.

 All the promises of an Expert Pro system.

Epert 250 Pro Audiovenue

2×250 Watts Under 6Ω

A piece of craftmanship for extreme performance.

The Expert 250 Pro pushes the limits of power amplification thanks to an exclusive hand-polished casing, equipped with a 100% pure copper bottom plate.


Choose from solo, dual-mono or up to 8 Expert Pro in multi-amplification and scale your system according to your individual needs.

With infinite configurability and performance that’s constantly pushing beyond, Expert Pro’s unique fractal architecture meets your every requirement.

Add another 250 Pro, and instantly you have a Expert 1000 Pro


Breakthrough after breakthrough, Expert Pro technologies continue to redefine audio industry standards.

Ten years of research and development, 160+ patents and 90 awards later, Expert Pro remains the most critically acclaimed audio system of all time.


ADH® hybrid amplification delivering the musicality of analogue and the power of digital, SAM® real-time speaker active matching, on-the-fly phono stage configuration with RAM®, Magic Wire® DAC to eliminate thermal distortion, free and regular upgrades through the EVO® platform…

Exclusively developed by Devialet engineers, these technologies radically enhance every aspect of Expert Pro’s architecture.

And with Core Infinity, Expert Pro’s new intelligent core, streaming your music without compromising sound quality is both simple and accessible.


Core Infinity opens Expert Pro to a whole new world of features designed to heighten current and future streaming capabilities.

Complete with the latest Devialet OS operating system, Core Infinity brings a range streaming protocols to Expert Pro, including Roon with Devialet AIR®, UPnP renderers, AirPlay®, Spotify Connect and more to come.

In wireless mode and Ethernet, discover a new world, open and future-proof.


Roon and Devialet are thrilled to announce that Expert Pro systems have been awarded Roon Ready certification, bringing the best of Roon’s features to the Expert Pro range.

Enjoy Expert Pro and Roon Ready to the fullest and discover our offer to celebrate this partnership.


1000 remote audiovenue

An exceptional piece of technology and craftsmanship, Expert Pro’s remote lets you control your system with extreme precision from the palm of your hand.

Operated via ultra-low latency, omni-directional radio link, volume control has never been as refined and reactive.

What’s in the box

  • 1 Devialet Expert 250 Pro
  • 1 Expert Remote (3 AAA batteries LR03 1,5V included)
  • 1 User Manual
  • 1 Warranty booklet (5 years)
  • 1 SD card
  • 1 Power cable
  • 1 Pair of gloves
  • 1 Microfibre cloth

Devialet Expert 250 Pro Specifications

Expert 250 Pro Specifications



Exclusive technologies

ADH®, SAM®, RAM®, AIR®, EVO®, DAC Magic Wire®

streaming services

Roon Ready
Spotify Connect

Daisy chaining

Up to 8 units

Pre-amplified output

Yes (mono / stereo)


Carved out from a single aluminium block

Side plating


Phono stage

Advanced (MM / MC)


Width: 400mm | Depth: 400mm | Height: 40mm



Power Supply

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)


2×250 Watts RMS under 6Ω

Distortion at full power

0.0005% THD+N

Distortion at full power

0,00025% (10W / 6Ω)

Distortion at 10w

0.00025% THD+N

Distortion at 10w

0,0005% (250W / 6Ω)

Signal-to-noise ratio


Output impedance


Damping factor



DC-30kHz @ -0.1dB
DC-95kHz @ -3dB

Phase rotation

0.4° at 20kHz
1.8° at 40kHz

Thermal distorsion

Below measurement threshold


2.4GHz / 5GHz 802.11ac, compatible with 802.11a/b/g/n


RJ45 100/1000 Mbps


USB Audio 2.0 Asynchronous
Very low latency
Bi-directionality (for digitisation of the analog sources)

Digital coaxial inputs

Up to 4x RCA 75Ω

Digital optical inputs

Up to 1x miniTOSLINK 3.5mm

Supported formats

Up to 32bits / 192kHz PCM (USB)
Up to 24bits / 192kHz PCM (AIR®, Roon Ready, UPnP, AES/EBU, Coaxial)
Up to 24bits / 96kHz PCM (Optical)
Up to 1bit / 3.072000MHz DSD64 (USB, Coaxial)

Analogue inputs

Up to 2x RCA stereo
Sensitivity adjustable via the Configurator
Advanced phono stage (MM / MC)

Speaker output

4mm banana plugs, fork connectors or stripped cables
Compatible with all speakers from 8Ω to 2Ω
Short-circuit protection
Active filtering available

Home automation

Up to 1x RS232 3.5mm 115200 bauds (documentation available via the Configurator)


3.5mm trigger connector Trig In and Trig Out





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.


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