Product Positioning
The M3 Ultra is the world’s first ultra-compact JAN6418 tube portable DAC headphone amplifier launched by MUSEHiFi. It brings the warm sound experience of a desktop tube amplifier into a 55g pocket form factor. When connected directly to a phone, it instantly transforms the sound to HiFi quality. It features ‘extreme portability + tube warmth + high driving power’ and is specially designed for mobile devices such as phones and computers.
It requires no complicated operation, just plug and play, greatly lowering the entry barrier for tube HiFi equipment. It is positioned as an entry-level audiophile portable DAC/AMP, filling the gap for high cost-performance portable tube headphone amplifiers, and is compatible with phones, computers, and other full-scenario mobile listening needs.
Introduction to JAN6418 Electron Tube
The JAN6418 is a military-specification directly heated miniature pentode tube produced by Raytheon in the United States. It was initially used in military communication equipment.
Due to its small size, low power consumption, and warm, delicate tone, it has become the golden choice for portable tube HiFi devices. Its core advantages include:
- Military-grade quality control, with stability and consistency far exceeding that of civilian tubes
- Directly heated design, offering more transparent sound and purer tube character
- Miniature size, allowing integration into portable devices while ensuring sufficient output power.
Selling Points
1. JAN6418 Military-Grade Electron Tube
MUSEHiFi is deeply tuned, with a warm tube flavor, delicate vocals, and full ambiance.
2. Triple Anti-Vibration Technology
Physical shock absorption + microphone effect cancellation circuit + adaptive noise reduction algorithm, completely solving tremor noise, providing stable listening on the go.
3. True Hollow Tube Design
A rare portable hollow tube amplifier in the industry, with both looks and sound quality.
4. Screenless Pure Sound Approach
Plug and play, no wasted space, focusing purely on sound quality.
5. $109 Bottom pricing
Similar products on the market are over $200, offering the ultimate cost-performance ratio.
Product Specifications
Model Name
M3 Ultra
DAC Chipset
ES9028Q2M
Operational Amplifier
ES9603Q
USB Chipset
SA9137L
Input
USB
Output Options
3.5mm / 4.4mm
Decoding Specifications
32bit 384kHz / DSD256
Signal-to-Noise Ratio
3.5mm: 120dB；4.4mm: 121dB (1kHz, A-Weighted, 32Ω)
Output Thrust
3.5mm: 460mW；4.4mm: 480mW (A-Weighted, 32Ω)
THD+N
3.5mm: 0.0004%；4.4mm: 0.0003% (A-Weighted, 32Ω)
Special Features
Tube-like warm output, triple shock absorption and noise reduction, fully balanced circuit
Weight
Approx 55g
Dimesions
65mm (L) × 16mm (W) × 46.5mm (H)