Muse HiFi M6 Double Review Roundup!!

In this ever-evolving world of portable audio tech, the market is dominated by minimalistic portable DAC/AMPs that all look vaguely identical, and innovation usually means change in specs, shape, and size. However, MuseHiFi has recently launched something very innovative, something that instantly upgrades the market with not just excellent sonic capabilities but also with its retro-inspired vintage Nixie tube volume display. We are talking about the latest Muse HiFi M6 Double. It is easily one of the most visually audacious, innovative, and exciting portable DAC/AMPs to hit the market. Limited to just 1,000 units worldwide, the M6 Double is less of a gadget and more of a statement piece. Equipped with ESS’s advanced ES9039Q2M DAC chipset along with a double tube design featuring dual JAN6418 tubes for rich and flavorful sound, and vintage IN-17 Nixie tubes for a classy neon volume display. It’s been a few weeks since the M6 Double has been out now, and we are hearing good things about the DAC/AMP from users worldwide. How does this fusion of classic aesthetics and modern high-resolution audio actually deliver an experience to the users? We are going to find out today. Today’s blog is a review roundup showcasing what the audiophiles have to say about the Muse HiFi M6 Double. Let’s get our reading glasses on and begin.

A Short Disclaimer:-

All the impressions are property of the respective creators. We have just summarized them for better readability. At the time of this writeup, the M6 Double is available for $399. You can check out the technical details and further information about the M6 Double on our website here.

Gizaudio:-

Dave from Gizaudio has shared an in-depth review of the M6 Double. Following his words, the MUSE HiFi M6 Double is a unique, limited-edition portable DAC/AMP priced at $399 that merges modern audio technology with vintage components. He highlights its standout feature: a rare IN17 Nixie Tube display for volume control, sourced from vintage stock dating back to the 1960s and 70s, which contributes to its status as a collector's item with only 1,000 units produced. Beyond its striking aesthetic, which includes a glowing side grill and a robust, "transportable" build, the device offers both tube and transistor amplification modes that can be toggled in real-time. The tube mode, utilizing Raytheon JAN6418 vacuum tubes, delivers a warm, analog, and natural sound with a wider soundstage and richer vocals. In contrast, the transistor mode provides a linear, neutral presentation with superior technicalities such as better imaging and detail retrieval. While the device excels at driving IEMs, Dave noted some bass distortion when pushing hard-to-drive planar headphones to high volumes. Finally, as a conclusion, Dave states, “While it may not outperform dedicated high-end dongles in pure technical performance, its appeal lies in its distinctive character, Bluetooth 5.2 support, and an 8-hour battery life”. Ultimately, the M6 Double is recommended as a collector's piece for those who value unique craftsmanship and a compelling, high-quality audio performance. You can check out his in-depth take on the Muse HiFi M6 Double in his Video linked below.

Andy Audio Vault:-

Andy needs no introduction among audiophiles. His Dongle Madness series has earned him a great reputation among audiophiles worldwide. He has shared an amazing review of the M6 Double, where he has also shared comparisons with competitor models like Cayin RU9, iBasso D17, etc. He finds the M6 Double to be a unique hybrid DAC/AMP that succeeds the M5 Ultra by incorporating dual-tube technology: a Nixie tube for its volume display and Raytheon JAN6418 military tubes for audio amplification. Despite being thicker and heavier than its predecessor, Andy highlights its versatility as a "transportable" device, finding it manageable in cargo pockets. A standout feature is its impressive Bluetooth performance via APTX Adaptive, which provides high-resolution, stable audio without the clutter of cables. The device features an upgraded ES9039 DAC chip, offering audibly more refined resolution and imaging compared to the older ES9038. Users can switch between a clinical, transparent solid-state mode and a warm, "velvety" tube mode that adds organic coloration and thickness to the sound. Battery life is excellent, reaching up to 9 hours even on high gain, and the unit remains cool during operation without microphonic noise thanks to an effective suspension system. While it lacks the raw power of some desktop replacements, it effectively drives demanding headphones like the Sennheiser HD 600 at moderate volume levels. Compared to competitors like the Cayin RU9 or iBasso D17, the M6 Double offers a compelling balance of organic analog sound, modern features, and relative value, making it a strong choice for those seeking a rich tube experience on the go. Andy’s review has been a great experience for the Muse HiFi M6 Double. We suggest you watch his review on his YouTube channel; we have linked it below.

ATech Reviews:-

We have another exciting review by Axel on the ATech Reviews YouTube channel. Muse Hi-Fi M6 Double is a limited-edition portable DAC/AMP, restricted to just 1,000 units, and priced at approximately $399. This premium device stands out with its unique hybrid design, featuring JAN 6418 tubes for audio amplification and a rare IN17 Nixie tube display that provides a visually stunning, depth-effect volume readout. Built with a dense metal chassis and glass panels, it is physically large but feels exceptionally well-constructed, coming bundled with a high-quality leather case and a variety of connection cables. Under the hood, it utilizes the advanced ESS9039 Q2M DAC chip and supports high-fidelity wireless audio via Bluetooth 5.2 with LDAC and aptX Adaptive. Axel highlights two distinct listening profiles: the Transistor mode, which offers a neutral, linear, and uncoloured sound with high precision, and the Tube mode, which introduces a pleasing warmth, richer mid-range, and smoother highs. He mentions that the official power specifications are absent, the device provides three gain levels, easily driving IEMs on low gain and powering demanding headphones like the Sennheiser HD 6XX effectively on high gain without any audible noise or hiss. We also have a short comparison with the M5 Ultra from Muse HiFi. In this comparison, he states that the M6 Double provides a more neutral bassline in its transistor mode and offers significantly improved resolution. Ultimately, it serves as both a high-performance audio tool and a unique collector’s piece for audiophiles. We recommend you check out his review on his YouTube Channel linked below.

The Honest Audiophile:-

Are you interested in a deeply explored review of the Muse HiFi M6 Double?? This review by “The Honest Audiophile” on YouTube is one of the most detailed takes on the DAC/AMP. The MUSE HiFi M6 Double is a premium, limited-edition portable DAC/AMP priced at $400 that distinguishes itself with a striking vintage-modern aesthetic. Limited to only 1,000 units, it features an ES9039 DAC chip, JAN 6418 tubes for audio amplification, and rare IN17 Nixie tubes used specifically for a depth-effect volume display. Despite its large, heavy frame and glass surfaces that attract fingerprints, it offers robust build quality and includes a protective leather case. The reviewer highlights its dual amplification modes: a neutral and analytical transistor mode that provides a clean, detailed presentation and a lush, "cozy" vacuum tube mode that adds body and smoothness to the listening experience. Performance-wise, it boasts significant power improvements over its predecessor, the M5 Ultra, easily driving demanding headphones like the Moondrop Para and Sennheiser HD 600 while maintaining a low noise floor for sensitive IEMs. With a 4,500mAh battery providing roughly 7 hours of playback and support for high-fidelity Bluetooth codecs like LDAC, it serves as a versatile, "portable-ish" powerhouse. Comparing it to competitors, the reviewer finds it more resolving and natural than the clinical SMSL DS20 and a clear step up from the M5 Ultra in both warmth and technical refinement. Overall, it is highly recommended for enthusiasts seeking a unique, high-performance collector’s item that masterfully blends historical vacuum tube charm with modern digital precision. Check out this complete review on “The Honest Audiophile” YouTube channel, linked below.

Prime Audio Reviews:-

The MUSE HiFi M6 Double is a standout, limited-edition portable DAC/AMP that brilliantly merges vintage aesthetics with modern high-fidelity audio. Priced at $399 and limited to just 1,000 units, it features rare, new-old-stock IN17 Nixie tubes specifically for a mesmerizing volume display alongside Raytheon JAN6418 vacuum tubes for amplification. Encased in a premium metal and glass chassis, it utilizes the advanced ES9039 DAC and supports high-res Bluetooth codecs like LDAC and aptX Adaptive. The reviewer here emphasizes its dual-nature sound profile: the Transistor mode offers a clinical, transparent, and neutral presentation, while the Vacuum Tube mode provides an immersive, "velvety" warmth that adds rich body to vocals and expands the soundstage. Despite its substantial "transportable" weight and size, it delivers impressive versatility, effectively driving everything from sensitive IEMs to demanding headphones like the Sennheiser HD 600 series. Its robust 4500mAh battery provides between 7 to 10 hours of playback, supported by a dedicated suspension system that eliminates microphonic interference. While it may not be the most pocket-friendly device, the M6 Double is highly recommended as a collector’s piece for audiophiles who value tactile engagement, historical craftsmanship, and the ability to toggle between clean precision and organic analog smoothness. It successfully transforms the listening experience into a visual and auditory event, offering remarkable value for its unique engineering and refined sound quality. You can check out this in-depth review on Prime Audio Reviews YouTube channel. We are linking this video below.

Final Words:-

Watching all these reviews and impressions from famous reviewers all around the globe makes us feel that the Muse HiFi M6 Double is more than just a portable DAC/AMP; it is a celebration of vintage tech with modern audio capabilities. While its “Transportable” size and Weight might challenge those looking for a slim and handy device, the payoff is a rich, musical sound that will captivate and engage the listeners every single time. If you value craftsmanship, unique design, and a lifelike sound signature, the Muse HiFi M6 Double looks like a perfect everyday companion. We hope this blog gives you an insight into the M6 Double. If you have any further questions or queries, you can ask us at our email support@hifigo.com. Thanks for Reading!!