KJ West One - Connoisseurs of Sound - Est. 1965
KJ West One - Connoisseurs of Sound - Est. 1965

The new upgrade 3.0 from Devialet lets expert owners who have non-Pro amplifiers (pre-2016) upgrade to the Pro version and get the Core Infinity upgrade at the same time. This brings the unit up to the latest possible version.

The new electronics (V6 platform) will give more power, enhanced audio performance, new features (Core Infinity) and a renewed 5-year warranty.

With the use of our dealer code (ST000063) you will also recieve a free 1 year subscription to Roon with the upgrade.

What is improved with the V6 hardware? 

  • New Class A amplifier, with an improved damping factor
  • New Class D amplifier, with optimised efficiency
  • New Magic Wire® DAC, with less THD over the full bandwidth
  • New power supply, more powerful and responsive Integration of the Core Infinity board, with reworked clock distribution for minimal digital jitter
  • New thermal management on the 250 Pro and the 1000 Pro,with a 100% pure copper bottom plate and rear panel 

Improved Power

  • +20W from Le 120 to the Expert 140 Pro
  • +20W from Le 200 to the Expert 220 Pro
  • +40W from Le 400 to the Expert 440 Pro Dual
  • +200W from Le 800 to the Expert 1000 Pro Dual

New streaming features from the Core Infinity board

1. Existing features from the DOS 2.1.x software version:

  • UPnP
  • Roon via AIR®
  • Devialet AIR®

2. New features from the DOS 2.2.x software version:

  • Airplay
  • Spotify Connect

3. New features to be activated with the future DOS 2.x.x software versions:

  • Roon via RAAT (Roon Advanced Audio Transport)
  • Bluetooth


To upgrade your unit please click HERE.