MUSEHiFi M3 Ultra Portable USB-C Vacuum Tube DAC and AMP
Bring the Warmth of Analog Wherever You Go
The MUSEHiFi M3 Ultra is one of the most compact and affordable portable tube DAC and AMPs on the market. By pairing dual military grade Raytheon JAN6418 vacuum tubes with a high performance ESS Sabre ES9028Q2M DAC chip, the M3 Ultra delivers a rich, warm, and distinctly holographic listening experience directly from your phone, tablet, or laptop. Featuring the patented World Gate open hollow frame and triple anti vibration technology, you get authentic analog tube sound without the fragile microphonics, hiss, or hum typically associated with vintage gear.
Authentic Dual JAN6418 Vacuum Tubes
This device features military grade, directly heated subminiature pentodes from Raytheon USA to add weight, organic texture, and a smooth, vinyl like presentation to your digital music. It brings the soul of analog audio into a portable form factor that fits in your pocket.
Massive 480mW Output Power
The M3 Ultra delivers up to 480mW of clean driving power via its balanced 4.4mm connection and 460mW on the 3.5mm port. This exceptional power output allows it to easily drive demanding in ear monitors and portable over ear headphones with authority.
Premium Sabre ES9028Q2M Decoding
A high performance ESS Sabre DAC chip decodes your high resolution audio files with ease. The system supports up to PCM 32 bit 384kHz and Native DSD256, ensuring you hear every detail in your recordings.
Triple Anti Vibration Shielding
MUSEHiFi employs a physical silicone damping structure, active noise cancellation algorithms, and circuit level vibration absorption to completely eliminate microphonic ringing on the go. You can walk, commute, and move around without hearing any metallic ringing in your music.
Low Power and Cool Operation
This portable amplifier runs remarkably cool, maintaining a stable operating temperature of just 33 degrees Celsius. It runs significantly cooler than traditional tube setups while conserving your phone battery for longer listening sessions.
Technical Specifications
| Feature |
Specification |
| DAC Chipset |
ESS Sabre ES9028Q2M |
| Vacuum Tubes |
Dual Raytheon JAN6418 USA Military Grade |
| Amplifier Chipset |
ES9603Q |
| Decoding Support |
PCM 32 Bit 384kHz and Native DSD256 |
| Output Power 3.5mm |
460mW at 32 Ohms |
| Output Power 4.4mm |
480mW at 32 Ohms |
| Output Impedance |
13.5 Ohms on 3.5mm and 8.6 Ohms on 4.4mm |
| Signal to Noise Ratio |
120dB on 3.5mm and 121dB on 4.4mm |
| THD plus N |
0.0004% on 3.5mm and 0.0003% on 4.4mm |
| Dimensions and Weight |
65mm by 16mm by 46.5mm weighing 55 grams |
In the Box
Your package includes the MUSEHiFi M3 Ultra Portable Tube DAC and AMP, a premium USB C to USB C interconnect cable, a user manual, and a warranty card.
Frequently Asked Questions
Q: Do the exposed vacuum tubes make the M3 Ultra fragile for daily use?
A: No. Despite the visually striking World Gate cutout, the M3 Ultra is built using a tough aluminum chassis with internal structural reinforcement and physical silicone bumpers. It has undergone rigorous multi angle drop tests from desk heights to ensure it easily handles daily transport.
Q: Will I hear microphonic ringing when moving or tapping the device?
A: No. MUSEHiFi solved this common tube issue by implementing Triple Anti Vibration Technology. This system combines physical silicone shock mounts, structural vibration dampening, and a specialized digital algorithm to actively cancel out microphonics for a quiet background.
Q: Why does the M3 Ultra have a relatively high output impedance?
A: This is a deliberate design choice. The output impedance acts as a natural tone shaping filter, especially for multi driver earphones. It gently smooths out overly analytical treble, fills out mid bass presence, and injects that iconic, rich tube warmth into your music.
Q: Will it drain my phone battery quickly?
A: While the JAN6418 vacuum tubes do draw slightly more power than standard solid state dongles, they are highly efficient military tubes designed for low power consumption. The device maintains an energy efficient profile to keep your source device running longer.
Core Hardware Overview
Dual JAN6418 tubes, full-balanced circuit, triple shock absorption, hollow window design, and 460/480mW strong output powe
Military-Grade Dual JAN6418 Tubes
Equipped with two military JAN6418 vacuum tubes.Delivers warm, rich vocal texture with full, immersive sound field for vocal and pop music
Ultra-Low Noise Floor ≤ -115dB
Extremely low noise floor eliminates tube hiss and hum. Enjoy pure black background sound without any distracting circuit noise during playback.
Low Constant Temperature Tube System
Long play temperature stable at only 33°C, much cooler than traditional tube gear (45-60°C). Low-power tube design ensures consistent warm tone without overheating
Dual High-Power Output Ports
3.5mm single-ended (460mW) + 4.4mm balanced (480mW) output @32Ω. Effortlessly drive sensitive IEMs, planar and high-impedance over-ear headphone
Triple Anti-Vibration Technology
3-layer anti-vibration design (circuit + algorithm + physical silicone damping). Effectively suppress tube microphonic vibration to maintain clean pure tube tone anywhere.
Drop & Vibration Resistant Floating Frame
Floating open-frame architecture passes strict drop, shock and vibration tests. Built-in triple anti-vibration system, portable and durable for outdoor travel use
Ultra-Light 55g Portable Body
Only 55g ultra-light compact metal chassis. Easy to carry for commute, travel, coffee shop and home long-hour listening
Wide Cross-Device Compatibility
Plug-and-play support for iPhone, Android phones, laptops and desktops. Works flawlessly with all IEMs and over-ear headphones for mobile & desktop Hi-Fi listening
