S1 MkII

About the S1 MkII

The LUMIN S1 MkII description you provided largely matches the **original LUMIN S1** network player/DAC, but there is no evidence of an "S1 MkII" variant from LUMIN, and some details (MkII naming, transformer model) are not supported by manufacturer or major retailers. The product should be treated and described as **LUMIN S1**, not S1 MkII. Key points that do match the LUMIN S1: - **Four ESS SABRE32 ES9018 DAC chips**, two per channel, with the DACs paralleled per channel. - **DSD support up to DSD128 (5.6MHz, 1‑bit)** and **PCM support up to 384kHz, 16–32‑bit stereo**. - **Upgraded/new clocking system** and an **external dual‑toroidal power supply** (two supplies in one chassis, one for the file player and one for the DAC). - **Fully balanced analogue output stage** with **XLR balanced and RCA single‑ended outputs**. - **Digital outputs**: HDMI (DSD 2.8MHz; PCM 44.1–192kHz) and **BNC S/PDIF** (PCM 44.1–192kHz, 16–24‑bit; DSD DoP 2.8MHz). - **Solid aluminium chassis**, available in **raw brushed** or **black anodized** finish, with player dimensions **350mm (W) x 345mm (D) x 60mm (H), 8kg** and PSU **100mm (W) x 315mm (D) x 55mm (H), 2kg**. - **Native support for TIDAL, Qobuz, Spotify, AirPlay**, plus **MQA**, via the LUMIN app and firmware updates; **Roon Ready**; UPnP/OpenHome streaming, gapless playback, playlists, etc. - Continuous firmware development and strong reviews worldwide (Positive Feedback, 6moons, The Absolute Sound, etc.). Problematic / unsupported elements: - The **"S1 MkII" name**: LUMIN’s own site and all major dealers list this product simply as **LUMIN S1**, now archived; there is no official MkII designation. - The description’s reference to **“dual LUNDAHL LL7401 output transformers”** is **not present in LUMIN’s specifications or major reviews**; they describe a fully balanced output stage but do not mention Lundahl transformers or the LL7401 model. Given this, the description is mostly correct for **LUMIN S1**, but should be adjusted to remove "MkII" and the specific Lundahl transformer claim, and to align strictly with published specifications. Revised description (for accuracy to this product): “The LUMIN S1 is a flagship audiophile network music player and DAC that builds upon LUMIN’s earlier designs with improvements across the digital, clocking, and power-supply architecture. It employs **four ESS SABRE32 ES9018 DAC chips**, two per channel with multiple DACs paralleled per channel, and supports **DSD playback up to DSD128 (5.6MHz, 1‑bit)** and **PCM playback up to 384kHz, 16–32‑bit stereo**. A **new clocking system** and an **enhanced external dual‑toroidal power supply** are used to improve resolution, dynamics, and noise performance. The **fully balanced analogue output stage** provides **XLR balanced (4Vrms) and RCA unbalanced (2Vrms)** outputs. Digital outputs include **HDMI** (DSD 2.8MHz; PCM 44.1–192kHz) and **BNC S/PDIF** (PCM 44.1–192kHz, 16–24‑bit; DSD DoP 2.8MHz). The player is housed in a solid aluminium chassis in **raw brushed** or **black anodized** finish, with dimensions **350mm (W) x 345mm (D) x 60mm (H)** and weight **8kg**, accompanied by a separate PSU measuring **100mm (W) x 315mm (D) x 55mm (H)** and weighing **2kg**. Streaming capabilities include **native support for TIDAL, Qobuz, Spotify, MQA, AirPlay**, and UPnP/OpenHome, and the unit is **Roon Ready**. The LUMIN app provides an intuitive interface with gapless playback, on‑device playlists, and rich metadata handling. Combined with a programme of continuous firmware development and highly positive reviews worldwide, the S1 is widely regarded as a reference‑level audiophile streamer/DAC.” Revised short description: “**The LUMIN S1 is a high‑end audiophile network music player and DAC featuring four ESS SABRE32 ES9018 chips, supporting DSD128 and PCM up to 384kHz with a fully balanced analogue output stage, external dual‑toroidal power supply, and comprehensive streaming support including TIDAL, Qobuz, Spotify, MQA, AirPlay, and Roon Ready integration.**”