MUSE HiFi / M6 Double Portable DAC/Amp

MUSE HiFi’s portable DAC/headphone amplifier is the world’s first model to fuse a military-grade JAN6418 vacuum tube with the Nixie tube—the world’s oldest digital display tube.

■ Equipped with Military-Grade "JAN6418" Vacuum Tubes
・ It utilizes the JAN6418, a military-spec, ultra-compact, directly heated pentode (NOS). It delivers a warm, rich midrange while smoothly refining high-frequency harmonics. Through two generations of product development, MUSE HiFi has significantly boosted the output in tube mode, achieving performance comparable to dedicated vacuum tube amplifiers.

■ World's First "Double" Architecture
・ Built on ESS's flagship chip platform, it features a "Double" architecture designed over two years specifically to integrate both vacuum tubes and Nixie tubes. A custom capacitor module utilizing rare metals stabilizes the 170V and 25V power rails while ensuring precise thermal management.

■ Proprietary Shock-Absorbing System to Protect Vacuum Tubes
・ A comprehensive shock-absorption solution was engineered specifically for the JAN6418 vacuum tubes. Using custom rubber components and suspension technology, the tubes are cushioned against vibrations from all directions during operation, stabilizing the electrical current. This thoroughly prevents the impact of external vibrations, supporting stable, high-quality sound.

■ Dedicated Power Supply with Dual-Stage Boost and Shunt Power Delivery
・ It employs a dedicated power architecture with independent rails: 170V for the Nixie tubes and 25V for the vacuum tubes. A specialized dual-stage boost circuit steps up the battery voltage directly to 170V, while an MCU controls 20 MOSFETs to drive the Nixie tubes, perfectly fusing HiFi audio, vacuum tube warmth, and Nixie display technology.

■ Highly Durable, World's Smallest-Class Nixie Tubes
・ It incorporates Nixie tubes—the world's first linear digital display technology, popular since the 1950s. The model used, the IN-17, is the world's smallest Nixie tube and boasts an industry-leading lifespan of up to 20,000 hours. Users can enjoy the beautiful, retro display with confidence over the long term. ■ High-quality Bluetooth functionality powered by the QCC5125
・ Equipped with Qualcomm’s latest QCC5125 chip, the device utilizes a dual-DSP and dual-core CPU architecture to ensure stability for both Bluetooth audio and system operations. It supports various high-quality codecs, such as LDAC and aptX Adaptive, allowing you to enjoy superior sound quality wirelessly.

■ Simple, intuitive UI design
・ It adopts a clean screen UI design inherited from the M5. By eliminating traditional second- and third-level settings menus in favor of a simple, single-level structure, the device offers an intuitive, stress-free user experience that requires no reference to the manual.

■ 4500mAh battery and independent USB-C ports
・ Equipped with a high-capacity 4500mAh battery, it delivers approximately 8 hours of operation. It features separate USB Type-C (2.0) ports for power supply and data transfer, supporting bus-powered operation when connected via USB. This ensures a stable operating environment even when connected to a PC.
・ Product Name: Portable DAC/Headphone Amplifier featuring Vacuum Tube & Nixie Tube
・ Chip / SoC: Bluetooth Chip Qualcomm QCC5125 / Custom ES9038Q2M DAC
・ Vacuum Tube: JAN6418 (Military-grade, ultra-compact, directly heated pentode NOS tube)
・ Display: Nixie tube (IN-17 model / Lifespan: up to 20,000 hours)
・ THD+N: Not disclosed
・ Output: Not disclosed
・ SNR: Not disclosed
・ Supported Sampling Rates (USB DAC): (Estimated) 32-bit/384kHz, DSD256 (*ASIO driver required for native DSD playback on Windows PCs)
・ Supported Bluetooth Codecs: AAC, SBC, aptX, aptX Adaptive, LDAC
・ USB Ports: USB Type-C (2.0) (Separate ports for charging and data transfer)
・ Battery Capacity / Runtime: 4500mAh / Approx. 8 hours (Uses bus power when connected via USB)
・ Weight: Unit 160g / Total package 600g
・ Notes: When using with a Windows PC, downloading and configuring a driver from the manufacturer's product page may be required.