MUSE HiFi / M3 Ultra Vacuum Tube Portable DAC/Amp

The MUSE HiFi "M3 Ultra" is a portable decoding headphone amplifier that integrates a military-grade JAN6418 vacuum tube into an ultra-compact form factor. It features proprietary triple anti-vibration technology, a fully balanced circuit, and a high power output of up to 480mW.

■ Equipped with Military-Grade "JAN6418" Vacuum Tubes
・ Features the "JAN6418" vacuum tube, renowned for its military-standard reliability and durability. Leveraging years of development expertise, we successfully integrated these tubes into the smallest possible form factor. This allows you to easily enjoy the distinctive, warm, and rich vacuum tube sound in a palm-sized, portable package.

■ Proprietary "Triple Anti-Vibration Technology" Eliminates Vibration Interference
・ A comprehensive anti-vibration system addresses the microphonics phenomenon inherent to vacuum tubes. Vibrations are suppressed across three stages—physical shock absorption via silicone dampers, a proprietary circuit algorithm that cancels vibration components, and overall system-level isolation—delivering clear, noise-free audio.

■ High-Power Output Supporting Both 3.5mm and 4.4mm Connections
・ Achieves high power outputs of 460mW (3.5mm) and 480mW (4.4mm) into a 32Ω load. With driving power that far exceeds the standards for portable amplifiers, it effortlessly drives a wide range of headphones and earphones that demand high power.

■ Fully Balanced Circuit Design Eliminates Crosstalk
・ Employs a fully balanced circuit configuration to thoroughly eliminate crosstalk during signal transmission. By preventing interference between left and right signals, it achieves superior channel separation and precise sound imaging, clearly and realistically reproducing the intricate atmosphere of the original recording and the positioning of each instrument.

■ Desktop-Grade DAC Circuitry for Precise Conversion
・ Features a circuit configuration designed for high-precision conversion from dual-clock digital audio to analog. Delivering performance comparable to professional-grade players, it converts digital signals into extremely high-quality audio output without compromising any information. ■ Multi-stage analog audio processing for meticulous sound engineering
・ The audio signal processing chain employs a multi-stage analog approach, incorporating LPF voltage amplification, BUF current amplification, and parallel-enhanced current amplification. By carefully processing and amplifying the signal, the device achieves a high-level balance between sonic purity and driving power.

■ Ultra-lightweight, compact design—fits in the palm of your hand and weighs only ~55g
・ Despite delivering powerful performance comparable to desktop amplifiers, the unit boasts an incredibly compact design, weighing just ~55g and measuring 65mm x 47mm x 17mm. It is effortless to carry, allowing you to set up a high-quality portable audio system anywhere.


・ Product Name: M3 Ultra
・ Type: Portable decoding headphone amplifier
・ Vacuum Tube: Military-grade vacuum tube (JAN6418)
・ Output: 3.5mm 460mW / 4.4mm 480mW (A-weighted, 32Ω load)
・ THD+N: 0.0004% (3.5mm)
・ SNR: 120dB (3.5mm)
・ Circuit Design: Fully balanced circuit design; desktop-grade DAC circuitry (LPF voltage amplification, BUF current amplification, parallel-enhanced current amplification)
・ Anti-vibration Technology: Triple anti-vibration technology (patented silicone physical shock-absorbing structure, proprietary algorithm-based microphonics suppression, system-level anti-vibration design)
・ Weight: Approx. 55g
・ Dimensions: 65mm x 47mm x 17mm
・ Port: USB Type-C