Devialet Expert 250 Pro
Devialet Expert 250 Pro
Devialet 250 Pro

Expert 250 Pro Amplifier

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.

5 Years




Every Expert 250 Pro input is configurable, meaning an unlimited amount of settings at your disposal, whether they be analogue inputs, digital inputs or outputs of either kind, the Expert 250 Pro adapts to your needs.

The built-in EVO card enables free, regular updates of the internal software that offer you the ability to improve the performance of your Devialet or to take advantage of new features in just a few clicks.

The 250 Pro comes with the latest Core Infinity firmware, which allows you to stream from the Devialet in a number of ways whether it be by Airplay, UPnP or via Roon. This means you are able to stream with ease from services like iTunes, Spotify, Tidal and Qobuz.

Like all Expert devices, the 250 Pro is fully controlled by software that allows you to configure it via their online configuration tool. Customise each of your inputs according to the sound source to achieve the best possible results.

On its own, the Devialet 250 Pro is an exceptional stereo system but it can also be upgraded at a later date by adding another 250 Pro and creating the flagship dual-mono 1000 Pro system.


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

Streaming Services
Spotify Connect

Daisy Chaining
Up to 8 units

Phono Stage
Advanced (MM / MC)

Pre-amplifier Output
Yes (mono / stereo)

Carved out from a single aluminium block

Side Plating

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


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% THD+N

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 Distortion
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 analogue 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®, 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

1 Devialet Expert 250 Pro, 1 Expert 250 Pro 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