U1 - The Audiophile Streaming Transport
A LUMIN for DAC owners; LUMIN U1 focusses on pure digital.
Key Features
- DSD512 22.5 MHz
- PCM 768 kHz
- DSD128 upsampling
- 5 types of output
- USB output
- Dual-toroidal PSU
Why LUMIN U1
After years of requests from existing high-end DAC owners, the LUMIN team have taken the finest components from the flagship S1 model and developed them specifically for digital processing and output.
Using a new dedicated LUMIN U1 processor adds upsampling and downsampling for every supported format – all the way from 44.1kHz to DSD128 – providing maximum DAC compatibility and optimisation.
Transport-Only Unit Based on the Award-Winning LUMIN S1
- 5 types of digital audio output including new USB
- Includes DSD512 22.5 MHz 1-bit playback
- PCM 44.1–768 kHz 16–32-bit
- 4 exceptionally low-phase-noise crystal clock oscillators
- External dual-toroidal power supply
- Resampling to every supported format up to DSD128 and PCM 384 kHz
- Supports DoP (DSD over PCM) for Optical, Coaxial RCA, Coaxial BNC & AES/EUB SPDIF

All the Usual LUMIN Refinements
- From MQA to DSD, FLAC to WAV, LUMIN can play all the high-resolution formats you could ever want
- Native support for TIDAL, Qobuz, Spotify and AirPlay-compatible, giving you access to tens of millions of songs
- The unique and intuitive LUMIN App described as "the most convenient interface in existence" by TINMAN
- LUMIN programme of continuous development that has seen Roon, MQA, and Spotify support added in 2017 alone

Supported Streaming Services

Leedh Processing Digital Volume Control

U1 Specifications | |
DSD Support | Up to DSD512 22.5 MHz, 1-bit |
PCM Support | Up to 768 kHz, 16–32-bit, Stereo |
Upsampling Rates & Bit Depths | DSD128 upsampling option for all files, PCM 384 kHz upsampling option for all files |
Digital Output Stage | USB: DSD512 22.5 MHz, 1-bit, Stereo, PCM 44.1–768kHz, 16–32-bit, Stereo Optical, Coaxial RCA, Coaxial BNC & AES/EBU: DSD (DoP, DSD over PCM) 2.8 MHz, 1-bit / PCM 44.1 kHz – 192 kHz, 16 – 24-bit |
Power Supply | External dual-toroidal, available in 240 V and 110 V versions |
Finish | Raw brushed aluminium or black anodised brushed aluminium |
U1 Dimensions & Weight (Solid Aluminium Chassis) | 350 mm (W), 345 mm (D), 60 mm (H), 8 kg |
PSU Dimensions & Weight | 100 mm (W), 315 mm (D), 55 mm (H), 2 kg |
Specifications for all LUMIN Music Streamers | |
Streaming Protocol | UPnP AV protocol with audio streaming extension (OpenHome) / Roon Ready / Spotify Connect / AirPlay compatible / Gapless Playback / On-Device Playlist |
App Features | Native support for TIDAL, MQA, Qobuz and TuneIn Radio / Tidal MQA icons to identify high-res music / Qobuz High-Res icons to identify high-res music / Volume control / High-resolution artwork / Artwork caching / Search / Multiple tag handling / Composer tag support / Album-grouping in playlist / Automatic internet links to artists, albums and songs / Saving and restoring of playlists (including TIDAL and Qobuz) |
Supported Audio File Formats | DSD Lossless: DSF (DSD), DIFF (DSD), DoP (DSD) / PCM Lossless: FLAC, Apple Lossless (ALAC), WAV, AIFF / Compressed (Lossy) Audio: MP3, AAC (in M4A Container) / MQA |
Input | Ethernet RJ45 network 1000Base-T / USB storage, flash drive, USB hard disk (single-partition FAT32, exFAT and NTFS only) |
Analogue Audio Outputs | XLR balanced, 4 Vrms, pin 2 hot / RCA unbalanced, 2 Vrms |
Supported Control Devices | All models of Apple iPad (v2 or later). iOS 8.0 or later required. Full Retina display support / Android devices. Android 4.0 (Ice Cream Sandwich) or later required |
Other | Leedh Processing lossless digital volume control / Programme of continuous development – Firmware-upgradable for further features and enhancements |
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