LUMIN U2X Network Streaming Transport

You already own a DAC you love. What it needs is the best possible digital signal. The U2X is LUMIN's flagship transport, built for exactly that job: everything in the box is dedicated to delivering clean, precisely timed digital audio to your DAC, with the same billet construction and external power supply as LUMIN's X-Series flagships.

The best thing you can do for a great DAC is feed it from a U2X.

The Design

The U2X and its separate power supply are each milled from a solid block of aluminium, giving thick, uninterrupted walls for maximum stiffness and shielding. The power supply uses dual toroidal transformers, separate digital and analog circuits, and low-noise linear regulation.

Its centerpiece is a new isolated USB output on its own dedicated port, designed to keep noise from the transport away from your DAC. The U2X also offers AES/EBU, coaxial RCA and BNC, and optical outputs, so it connects to virtually any DAC. It plays native DSD512 and PCM 768kHz over USB, and LUMIN's fastest processor provides upsampling up to DSD256.

The U2X is the first LUMIN with 10MHz clock connections: one input and two outputs. Connect a master clock to the input, or use the U2X's outputs to synchronise other digital components to a single, stable timing reference. Optical fibre networking isolates the U2X completely from network noise, and the second network port doubles as a built-in switch.

How It Sounds

Reviewers describe a transport that makes the DAC after it sound like a better DAC. StereoNET's Eric Teh heard a strikingly realistic, holographic portrayal of instruments and voices, fluid and non-fatiguing yet highly resolving. 6moons' Frederic Beudot found it more real and tactile than any other streamer he'd heard for microdynamics and inner detail. Hi-Fi News heard music become more clear-cut, with more substance, definition, and rightness, even through simpler DACs.

Where It Fits

The U2X is for listeners who have invested in an excellent DAC and want a transport worthy of it. With a 10MHz master clock such as the Matrix Audio SC-1, the U2X joins a fully clocked digital system. For a transport at a lower price, the U2 and U2 Mini follow the same transport-only approach. If you'd rather have LUMIN's own conversion, the X2 shares the U2X's chassis construction and power supply with LUMIN's discrete DAC inside.

Press Recognition

• Hi-Fi News (November 2025), Andrew Everard, Outstanding Product Award. Everard heard clear gains in substance, definition, and rightness over lesser transports, and called the U2X an ideal source for a forward-looking digital system. Read the review (PDF)
• Audiophile Style (February 2026), Chris Connaker, CASH Award. Connaker found the U2X absolutely worthy of the flagship title and said it made him excited to listen again. Read the review at Audiophile Style
• StereoNET (November 2025), Eric Teh, Applause Award. Teh called it an astoundingly good streamer with a beguilingly fluid sound, and digital audio close to its finest. Read the review at StereoNET
• 6moons (December 2025), Frederic Beudot. Beudot called the U2X perfectionist hi-fi done right, and absolutely worth it for reference-class digital playback. Read the review at 6moons
• i-fidelity (September 2025), André Schwerdt, Reference Award. Schwerdt heard a soundstage that reached far beyond the speakers, and found the optical network connection opened the stage further still. Read the review at i-fidelity
• Hi-Fi Class (April 2026), Editor's Choice. The reviewer called it one of the best network transports ever, with a complete, coherent, and fluid presentation. Read the review at Hi-Fi Class (Polish)

The U2X has also earned a Diapason d'Or. Want help matching it to your DAC or adding a master clock? Give us a call.

Specifications

• Type: Network streaming transport (digital output only)
• DSD support: Up to DSD512 (22.6MHz), 1-bit
• PCM support: Up to 768kHz, 16 to 32-bit
• Upsampling: DSD256 or PCM 384kHz, all files
• Isolated USB output: Native DSD512, PCM to 768kHz
• Optical, coaxial RCA, coaxial BNC, AES/EBU outputs: PCM to 192kHz/24-bit, DSD64 via DoP
• 10MHz clock: 1 BNC input, 2 BNC outputs, 50 ohms
• Network: SFP optical, RJ45 Gigabit Ethernet, usable together as a built-in switch
• USB ports: 3 total, including a dedicated isolated audio output; storage supported (FAT32, exFAT, NTFS)
• Streaming: Roon Ready, TIDAL Connect, Qobuz Connect, Spotify Connect, AirPlay, Plex, UPnP/OpenHome, Audirvāna, JPLAY, Amazon Music, TuneIn, KKBox, QQMusic
• File formats: DSF, DFF, DoP, FLAC, ALAC, WAV, AIFF, MP3, MQA
• Volume: Leedh Processing lossless digital volume control
• Power supply: External solid-billet chassis, dual toroidal transformers, separate digital and analog circuits, low-noise linear regulation
• Control: LUMIN app (iOS, Android, Apple Silicon Mac, Chromebook)
• Dimensions, transport: 350mm W x 345mm D x 60mm H (13.8" x 13.6" x 2.4"), 8kg (17.6 lbs)
• Dimensions, power supply: 106mm W x 334mm D x 60mm H (4.2" x 13.1" x 2.4"), 4kg (8.8 lbs)
• Finishes: Black anodised or raw anodised aluminium, with matching power supply
• Designed in: Hong Kong