Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
Product Strengths
- Fleshed out, palpable, natural and organic sound presents a fully colored landscape
- Instruments are reproduced with a level of sound ingrained to them that is seldom appreciated, textures and tonality of instruments from high-quality recordings hijacked the imagination completely
- Tonal purity, emotional engagement, and dynamic nuances are done really well
- Intense engagement and scales unbelievably
- Incredibly spacious presentation presents tone and immediacy of the original equipment from the 1930s and 1940s, but completing all of their shortcomings
Product Considerations
- Soundstaging and imaging is not bad, but other systems may have a wider, deeper soundstage, sharper image or more precise imaging, transparency may be better in other systems
- Requires the best equipment in the world to a certain degree
- Could require gear on a whole other level, minimum Audio Note speaker SPE HE speaker, minimum 25 square meters of room and minimum Audio Note DAC 2.1 signature or DAC 4
- May highlight the upper midrange which is something that some people may not like
Comparisons (according to reviewers)
- Compared to other Audio Note Amps—a lot of that sound from the Oto from the Maisho from the Jinro from the Tomai in the Onkaku
- Audio Note Tonmeister may be a tiny bit better with a more emotional connection
Takeaway: The Ongaku is a real, amazing product that produces an unparalleled level of emotional engagement with music and is able to draw out nuances unheard in other systems. If truly connecting with music is a priority, then the Ongaku may be worth considering.
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Ongaku
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Manufacturer details
- Input Impedance: 100K Ohm, line level
- Input Sensitivity: 450mV for full output
- Maximum Output: 20 Watts (approx.) per channel into 4 or 8 Ohm loads
- Channel Balance: +/- 0.3dB
- Valve Complement: 2 x 5R4WGB, 2 x 211 / GE VT-4C, 1 x CV4068, 1 x 6463
- Unit Weight: 48 kg
- Unit Dimensions: 305mm (h) x 305mm (w) x 640mm (d)
- Mains Input: AC 100-120V / 220-240V 50/60Hz
- Max. Power Consumption: 200W
Only the finest possible components have been employed: - Audio Note (UK) silver wire has been used exclusively for all internal wiring, including all transformers and power supply connections. Audio Note two watt Tantalum resistors have been used throughout. All capacitors are either Black Gate Electrolytic or Audio Note (UK) silver foil. All transformers are our own in-house custom designed and manufactured devices; driver and output transformers are fully silver wired AN-Perma 50 nickel C-core and the mains transformer is a fully silver wired HiB double C core.
No integrated amplifier has ever produced the levels of musical purity delivered by the ONGAKU… It is without doubt the finest possible integrated amplifier available today. It has been specifically engineered for sonic performance rather than technical specification, and fulfils all Audio Note (UK) Level 5 criteria: - Pure Class A operation Zero Negative Feedback Single Ended Output Stage Valve Rectification Directly Heated Triode operation Materials and co...
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
- Audio Note prioritizes musicality above technical specifications, focusing on creating components that sound like real music—regardless of measurements.
- Audio Note designs components with long lifespans, avoiding frequent model iterations and focusing on component quality and core design principles, resulting in products that remain relevant for decades.
- They often use tube rectification and valve amplification and are Single Ended Output Stage, directly Heated Triode operation.
- Their CD players often use a Philips CD Pro 2LF CD mechanism that has been custom modified and improved in-house, focusing on performance rather than technical specs, and often avoid oversampling and digital filtering.
Select products
DAC 0.1x
- Positioning: Entry-level model in the Audio Note DAC lineup.
- Description: Features a 1x oversampling technology that avoids digital filtering, which is unique compared to higher models that may include more complex circuitry. Uses a Philips TDA1543 chip and a 6111WA valve output stage, making it ideal for small rooms or budget-conscious users who still want quality tube sound.
DAC 1.1x
- Positioning: Positioned as a step above the entry-level, offering enhanced performance.
- Description: Improves upon the 0.1x with an 18-bit AD1865 chip, providing a richer sound experience. Maintains the no-oversampling approach.
DAC 4.1x
- Positioning: High-end model designed for serious audiophiles.
- Description: Features advanced components like custom transformers and a sophisticated output stage, providing superior sound clarity and detail.
DAC 5
- Positioning: Flagship model representing the pinnacle of Audio Note's DAC technology.
- Description: Features the most advanced digital circuit and highest quality materials, including silver-wound transformers.
Our take on the brand
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Audio Note
What if you spend more?
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Product Strengths
- Exceptional sound quality right away that continues to improve
- Capable of uncompressed dynamics at both loud and soft volumes, micro and macro, and doesn't harden or distort when playing loud
- Can handle big scale, orchestral, beautiful music to really raw, crazy metal music, all played convincingly at loud and soft levels
- New details are revealed without being hyper-analytical, sterile, or harsh
- Built like military materiel
Product Considerations
- Each monoblock weighs 145kg, so owners will welcome assistance when receiving it
- Inputs are on balanced XLR only, while the solid copper speaker terminals are designed for spade lugs, not 4mm bananas
- The Breguet watch dial-inspired meter's 'time-keeping' is less accurate
Takeaway: The D'Agostino Relentless 800 reproduces a wide range of music genres with detail and dynamics, offering an immersive and enjoyable listening experience. It brings out the best in music.
Video review
Our take on the brand
Named after a great Swedish choir conductor, ERIC is our no-compromise statement power amplifier. Fully balanced and transformer-coupled, it was created to drive even the toughest loads. ERIC uses separate power supplies for input and output stages and DC filaments. While the original model launched in 2016 used rare and specially designed T-100 power output tubes, the urge for even more power and refinement could not be ignored. Further R&D led to 845 power output tubes, an evolution so electrifying it earned the title ENCORE. The sound digs deeper, spreads wider and peers farther into the Scandinavian soundscape. Weighing in at 65kg per monoblock, the ERIC ENCORE is a titan of the industry in both size and sound.
Product Strengths
- Crisp, tight rhythms are allied to a sonorous, close-focused view of vocals
- Capable of bags of detail and definition, while bathed in a lovely warmth
- Massive bass weight is available, with fabulous rosiny bite to the low strings, silky violins, and the feeling of space and air around the performers
- Big, substantial sound makes the most of remasters, bringing out all the character of vocals
- Focus and warmth contributes to a solid, three-dimensional soundstage, and remains clean and tight when cranked
Product Considerations
- The precious bottles should never be left unattended or used without the purpose-designed glass hood installed
- The amps' thermal characteristics may be a problem in a globally-warmed English summer
- Each amp draws 430W from the wall
Comparisons (according to reviewers)
- Vs Dan D'Agostino Relentless Monoblocks—the ERIC Encores are more expensive per watt
Takeaway: The Engström ERIC Encore Mono Power Amplifiers offer a captivating and enthralling presentation that challenges old clichés about valve amps. One should hear them if given the chance, for they sound glorious.
Video review
Our take on the brand
Product Strengths
- Delivers 800W of class-A power regardless of the speaker load
- Features XD technology that lowers output impedance, resulting in more control over the speaker drivers and improved soundstage depth
- Employs Sym-Max technology to significantly reduce second-order harmonic distortion, bringing out more detail and improving the sense of timing and pacing
- Has a power supply consisting of 5400VA of transformers and 188,000µF of filter capacitance for substantial power delivery
- Offers protection against excess direct current, short circuits, and voltage sags—brown outs
Product Considerations
- It may be too much power for some users
- High idle heat dissipation at 890 btu/hr per channel
Takeaway: The Krell KMA-i800 is a powerful amplifier with technologies that aim to provide a clean and controlled sound. Its high power output helps to improve sound quality even at average listening levels.
Video review
Our take on the brand
Introducing the MTRX2 V2: A Masterpiece of Precision and Passion. Unlock the pinnacle of audio excellence with EMM Labs' latest innovation, the re-imagined MTRX2 V2. These 1000W Class A/B solid-state mono amplifiers are meticulously crafted to deliver an unparalleled auditory experience, setting a new standard in high-end audio amplification technology.
At the heart of the MTRX2 V2 lies a fusion of expertise and innovation, meticulously curated by Ed himself. With the introduction of the high-current Meitner Power Driver, these amplifiers effortlessly navigate even the most demanding speaker loads. They deliver high power while maintaining low distortion and wide bandwidth, ensuring pristine audio quality. Redesigned proprietary power systems ensure unwavering performance and reliability, promising an immersive listening journey like no other.
The MTRX2 V2 boasts an impressive array of features:
• Proprietary fully discrete circuit topologies
• Latest generation proprietary power system for enhanced performance
• Aerospace-grade ceramic PCB boards for superior durability
• Fully balanced audio paths throughout, guaranteeing optimal signal integrity
• Capability to deliver massive transient currents instantaneously
• Ability to tackle complex loads down to 1Ω with ease
• Internally wired with Kimber Kable, ensuring premium connectivity
The MTRX2 V2 is equipped with real-time protection mechanisms. Even during the most intense listening sessions, users can rest assured that their speakers and amplifiers are safeguarded, providing peace of mind.
Crafted, manufactured, and meticulously built in Canada with an unwavering commitment to quality, the MTRX2 V2 mono amplifiers redefine the boundaries of audio reproduction. For discerning enthusiasts who demand nothing short of perfection, the MTRX2 V2 stands as the ultimate expression of uncompromising audio excellence.
Our summary
Product Strengths
- High amounts of power, supreme bass weight, and woofer control
- Velvet-smooth sound throughout the audioband, particularly in the midrange, with high resolution
- Images with tube-like dimensionality, creating soundstages of convincing depth
- Sound reproduces without colorations
- Functions flawlessly, with no operational glitches, and is bulletproof in terms of safety and reliability with a comprehensive monitoring system
Product Considerations
- The MTRX2s are big and heavy, making them difficult to move and install
- The MTRX2's big, blocky look was not well-received
- High power output might be overkill for rooms of typical size
- The balanced (XLR) and single-ended (RCA) inputs seem of good quality, if nothing extraordinary
Takeaway: The MTRX2 offers exceptional sound quality, high power, and reliability. If you desire a top-tier listening experience with no coloration and are seeking an end-game amplifier, the MTRX2 could be the perfect choice.
Video review
Our take on the brand
What competes at this price?
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Our Summary
Product Strengths
- Delivers lots of current due to a new 2000VA toroidal transformer
- The Apex Stereo's ease of presentation was immediately obvious—it fully engaged the reviewer
- The amp exuded supreme self-confidence
- The amp simultaneously speeds things up and slows things down
- Superior speaker grip, improving organization, timing, and musical flow
Product Considerations
- Initial start-up can be alarming due to flashing error lights
- The size and weight (445 lbs) can make installation challenging
- It's gigantic and heavy, requiring special equipment and tools to handle its production
Comparisons (according to reviewers)
- Vs Boulder 2060: The Apex revealed more tonally saturated sounds
- Vs Boulder 2060: Apex cast a larger soundstage, and within those huge spaces, images were generally larger and more three-dimensional
- Vs Boulder 2060: Apex exposed more detail in the music
Takeaway: The Gryphon Apex Stereo is a powerful amplifier that brings music to life with a balanced and full sound at any volume. Its ability to reveal the resonant nature of instruments transforms listening sessions into immersive experiences.
Video review
Our take on the brand
Our Summary
Product Strengths
- Exquisite aesthetics with a sleek design and a power meter that glows green
- Delivers a smooth and satisfying sound
- The sound is described as 'louder' and more powerful
- Said to be able to drive any speaker to its maximum output
- Upgrades are retrofittable to earlier Momentum models
- Balanced input only
Product Considerations
- Runs warm
- The scale on the power meter is essentially uncalibrated
- Requires a return to the factory for MxV upgrades on earlier Momentum Models
Comparisons (according to reviewers)
- The Momentum M400 MxV incorporates technology from the Relentless line and gets very close to the Relentless sound regarding space and depth
- The Momentum M400 MxV is smaller and lighter than the Karan Acoustics POWERa mono
- The Momentum M400 MxV is smaller and lighter than the D'Agostino Progression M550 Mono amplifier
Takeaway: The Momentum M400 MxV monoblock is a beautifully designed and powerful amplifier that delivers a smooth and satisfying listening experience. It incorporates technology from the flagship Relentless model, making it a top-tier choice for audiophiles.
Video review
Our take on the brand
Our Summary
Product Strengths
- Fully balanced design, handcrafted in the USA
- Employs a sextet of KT170 valves, ECC83, and 6H30, with hand-selected and matched valves
- Features Audio Research's 'Auto-Bias' circuitry and an internal hour meter for monitoring valve usage
- Aesthetically elegant design with unique 'Ghost Meters' which are LED-illuminated and can be dimmed or switched off
- Capable of delivering high power at low frequencies, controlling and driving speakers like a big solid-state amplifier
Product Considerations
- High price point
- Requires a 20A IEC cable (supplied)
- The bass control and sheer bass output of the Gryphon Audio Antileon EVO (solid state) could not quite be matched by the Reference 330M
- The unit use a variable speed fan, although it was essentially silent during testing, this may still present a point of concern for some users
Comparisons (according to reviewers)
- Vs Gryphon Audio Antileon EVO: The Gryphon Audio Antileon EVO (solid state) has slightly better bass control and output
Takeaway: The Audio Research Reference 330M is an intelligently engineered and beautifully styled amplifier that embodies the meaning of 'Reference' in sound quality. Its powerful valve design delivers excellent performance and is sure to be a conversation piece in any high-end audio setup.
Video review
Our take on the brand
Our Summary
Product Strengths
- Build quality is among the best, with all pieces fashioned from solid aluminum
- The system delivers an effortless and truly reference-level sound
- Produces deep and powerful bass that energizes the room with ease
- Offers stunning analogue playback with incredible soundstaging, holographic image, depth, and width
- Delivers music with startling clarity across all genres
Product Considerations
- The Reference Preamplifier lacks a remote, focusing on a purist design
- The Reference Three speakers are very heavy—weighing 100kg net
Comparisons (according to reviewers)
- The Avid Hifi Reference system performed similarly well with Fanfare for the Common Man, producing impressive bass and dynamics, compared to the YG Acoustics system with Boulder
Takeaway: The AVID HiFi Reference system is a top-tier system delivering exceptional sound quality and effortless power. It is designed to provide an extremely enjoyable and immersive music experience, making it a worthwhile investment for serious audiophiles.
Video review
Our take on the brand
Our Summary
Product Strengths
- Handcrafted in the USA
- Beautifully designed and superbly assembled
- Skillfully balances accuracy and romanticism, combining precision and beauty
- A powerful amplifier that controls and drives speakers effectively
- Provides panoramic vistas of large orchestras in grand acoustic spaces
Product Considerations
- Requires a 20A IEC cable (supplied)
- Bass output could not quite be matched by the Gryphon Audio's Antileon EVO
Comparisons (according to reviewers)
- Outdid the Audio Research Reference 160S, which performed superbly
- Outperforms the Audio Research 750SEL in every way
Takeaway: The product is intelligently engineered, superbly built, and elegantly styled, with a sonic standard that epitomizes the meaning of 'Reference'. It is a blindingly powerful valve-glow beacon of amplification excellence.
Video review
Our take on the brand
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