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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
- Exceptional bass control, power, speed, and definition provides a bedrock foundation for the music
- Wide and deep soundstage with precise imaging
- Dead-neutral tonal balance with grain-free clarity, effortless speed, and precision
- Life-like dynamic expression and detail resolution, sounding exquisitely lifelike
- Lively, energetic sound combined with pleasing harmonics, warmth, and a kind of lusciousness achieves a nice balance
Product Considerations
- The binding posts are located low on the rear panel, which might be problematic for some installations
- It gets hot, requiring adequate ventilation
- It's a heavy unit, making it difficult to move and set up
- The cost is very high, making it exclusive-level hifi
- The speaker spiked feet can make it difficult to position the amplifier
Comparisons (according to reviewers)
- Vs Diablo 300, the Diablo 333 gives more music and musical information, developing the soundstage with harmonic information, knitting all the individual parts together; the music becomes less about individual things and more about the whole
- Strong resemblance to the Apex Commander combination, but at a fraction of the cost
- While the Antileon digs deeper and presents a fuller presentation across the low frequencies, the Diablo 333 slams harder and slightly tighter
Takeaway: The Gryphon Diablo 333 is a powerhouse integrated amplifier that combines exceptional power and control with refined sound and detailed musicality making it one of the very best amplifiers, be it integrated or not. Its versatility and musical soul make it a solid choice for anyone looking for an end-game component.
What are hifi reviews useful for? (1) Identifying products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've heard (this means they probably are legitimately great). (3) Identifying a product's attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we often discount what reviewers say because they heap praise on most products—and are often apprehensive about publishing strong criticism or comparisons between products. Further, they seldom have more than a few products on-hand, often relying on their memories to compare past products. Always listen for yourself.
All
Diablo 333
reviews
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An excellent review of a great product
/
Publisher
/
3/1/2022
An excellent review of a great product
Publisher
/
3/1/2022
Video Review
Manufacturer details
Features
Specifications
- Power Output: 2x333W@8Ω, 2x666W@4Ω, 2x1100W@2Ω
- Output impedance: 0.015Ω
- Bandwidth (-3dB): 0.1Hz to 350 kHz
- Power Supply Capacity: 2 x 68,000uF
- Gain: +38dB
- SUB output gain: +12dB
- Input Impedance, balanced (20-20000Hz): 50KΩ
- Input Impedance, single ended (20-20000Hz): 30KΩ
- Power consumption: ≤0.5W (standby), approx. 180W (idle)
- Operating ambient temperature range: 15-30°C (59-86°F)
- Dimensions (WxDxH): 468mm x 472mm x 245mm (18.4in x 18.6in x 9.66in)
- Net weight: 50.6kg (112lb)
- Shipping weight: 67.0kg (148lb)
Description
Integrated amplifiers have become the essential audio component, distilling sources, amp, preamp and interconnects into a single chassis. And since 2015, connoisseurs have revered the Gryphon Diablo 300 as the finest integrated amplifier ever produced and a genuine "Object of Desire." Unanimously praised by critics and with thousands sold, it became High End Audio's most coveted "Ultra-Luxe" integrated. Surpassing the '300 was no easy feat; however, thanks to the engineering genius of Gryphon's Chief Designer, Tom Moeller, the artistic sensibilities of Gryphon Founder Flemming Rasmussen as well as the development of cutting-edge component technologies, Gryphon has authored a new benchmark, better in virtually every respect than its iconic predecessor. A completely reimagined amplifier whose ideal feature set, aesthetic beauty, heirloom build quality and enormous performance envelope establish an unprecedented level of excellence. Gryphon proudly introduces Diablo 333: The World's Finest Integrated Amplifier.
Integrated amplifiers have become the essential audio component, distilling sources, amp, preamp and interconnects into a single chassis. And since 2015, connoisseurs have revered the Gryphon Diablo 300 as the finest integrated amplifier ever produced and a genuine “Object of Desire.” Unanimously praised by critics and with thousands sold, it became High End Audio’s most coveted “Ultra-Luxe” integrated.
Release Timeline
Manufacturer Site
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:
- Gryphon amplifiers use a distinctively robust power supply featuring custom-made toroidal transformers and substantial filter capacitance, contributing to exceptional dynamic headroom and speaker control.
- The brand's industrial design, originally led by Flemming Rasmussen, combines bold aesthetics with practical functionality, creating visually striking components with user-friendly interfaces.
- Gryphon prioritizes short, direct signal paths and minimal internal wiring to maintain signal purity and transparency, enhancing sonic performance by reducing potential noise and interference.
- They offer modular designs with optional phono stage and DAC modules, allowing customers to tailor their components to their specific system needs and upgrade in the future.
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Select product comparisons
Diablo 333
- Positioning: Gryphon's top integrated amplifier, succeeding the Diablo 300.
- Description: Integrates advanced technologies from Gryphon's flagship models, offering enhanced musicality and power. Features a dual mono configuration and optional phono and DAC modules, providing flexibility and high compatibility with various audio systems. This amplifier is ideal for users with a higher budget who desire a compact yet powerful system for larger rooms.
Essence
- Positioning: The entry-level high-end power amplifier in Gryphon's lineup.
- Description: Offers pure Class A operation with a focus on sonic neutrality and dynamic ease, making it ideal for small to medium-sized rooms. Features a dual mono design with separate power supplies for the output and driver stages, which is a step up from integrated designs like the Diablo 333.
Antileon Evo
- Positioning: A mid-tier power amplifier known for its high current capability.
- Description: Excels in delivering high instantaneous current, ensuring compatibility with demanding loudspeakers, which is a significant advantage over the Essence. Uses pure Class A bias and features a dual mono configuration, offering superior control and speed.
Mephisto
- Positioning: A high-end power amplifier designed for the most demanding audiophiles.
- Description: Offers exceptional current delivery and stereo separation, making it ideal for large rooms and high-end audio setups. Features a dual mono design with separate power supplies, providing superior channel separation and control compared to the Antileon Evo.
Apex
- Positioning: Gryphon's flagship power amplifier, representing the pinnacle of their design and engineering.
- Description: Delivers immense power and refinement, capable of driving any loudspeaker with ease. Features pure Class A operation with a massive power reserve, surpassing the capabilities of the Mephisto. This amplifier is for those with an unlimited budget who demand the absolute best in audio performance and are willing to invest in a statement piece for their audio system.
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Avg. Product Price
$20,001-$30,000
Used For Sale
15
Available (Scroll Down)
Brand Popularity
115
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
27
Founding Year
1985
Our take on the brand
Gryphon is one of the most respected high-end amplifier brands in the world. Its bass grip is phenomenal, thanks to an unusually high level of capacitance, which keeps everything tight and controlled, even with demanding speakers. Gryphon is also known for its bold, brutalist design—a look that a lot of people love. You’ll find their gear all over Europe and Asia, and the Diablo 333 is often considered an ‘endgame’ amp by those chasing the very best sound and aesthetics.
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What are your favorite tracks for showcasing the strength of your products?
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What if you spend more?
Audionet
Max
30500
30500
/
8
Reviews
Audionet is a hifi brand whose Ultra Linear Amplifier technology, originally developed for medical applications, provides exceptional signal purity and stability. Their products, particularly the MAX monoblocks and DNP/EPX combo, are known for extraordinary dynamic performance and bass control.
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Our summary
Product Strengths
- Ample power with minimal distortion
- Audionet's ULA (Ultra-Linear-Amplifier) technology, originally developed for medical engineering
- Impressive dynamic prowess and the ability to plumb the hidden depths of CDs and LPs
- Subtle musical and instrumental details come through cleanly and coherently, without compromising life-likeness of tone colors and harmonic expression
- Exceptional bass reproduction, with a rich, detailed, and uniform low end
Product Considerations
- Positive and negative speaker terminals are close together, requiring caution when connecting speaker cables
- Balanced input use involves an op-amp, which some believe impacts sound quality, single-ended inputs are preferred by some
- A preamp should be used to get the best sound from these amplifiers
- Display text changes locations randomly, which some may find distracting
Comparisons (according to reviewers)
- The Burmester sounded cleaner, airier, and more revealing, but could not quite compete with the AMP II MAX in authority over the bass frequencies and in blackness of the background
- The Pass Labs was tonally rich and pleasurably soft, plus the amp gave an extraordinarily punchy presentation, in that it bettered the performance of the AMP II MAXes, on the other hand, it was rather general in the organization of the soundstage and the background wasn't quite as black as with the AMP II MAXes
- Plinius shone in resolution, as well as delivered exceptionally dimensional soundstage and very neutral overall sound, especially in Class A mode, however, it did not have the same punch as the AMP II MAXes, and the sound wasn't equally gentle
- The McIntosh MC-501 delivered a richer and warmer sound, but with less power and extension than the AMP II MAX
Takeaway: The Audionet Max monoblocks offer a powerful and refined listening experience, making music sound engaging and detailed. Their ability to control speakers and reveal nuances in recordings makes them a great choice for serious audiophiles.
Video review
Our take on the brand
Audionet is a hifi brand whose Ultra Linear Amplifier technology, originally developed for medical applications, provides exceptional signal purity and stability. Their products, particularly the MAX monoblocks and DNP/EPX combo, are known for extraordinary dynamic performance and bass control.
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Absolare
Hybrid Stereo
38000
38000
/
3
Reviews
The Signature series is a significant step above the Passion series. The entire signal path utilizes Duelund’s select CAST coupling capacitors together with Echole’s Orius cabling. Critical parts of the power section and signal path utilize other custom components such as proprietary Silver/Gold/Palladium signal path on the PCB and matched Amtrans AMRG resistors to name a few
Absolare pioneered a hybrid amplifier design that combines the warmth of single-ended circuits with the control of push-pull formats, achieving the rare feat of bringing single-ended's signature midrange qualities to a hybrid configuration. Absolare is renowned for its luxuriously designed, leather-wrapped amplifiers and world-class expertise in vacuum tube hifi amplifiers.
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Our summary
Product Strengths
- Preserves the sonic signature of tube electronics, while being able to drive a wider range of loudspeakers
- Has astonishing liquidity of timbre, and is utterly grain-free
- Projects a sense of presence that sounds very much like the best SET amplifiers
- Creates a directness of musical expression, fostering an intimacy with the music and performers
- Produces a very warm midrange, and sweet top end
Product Considerations
- Treble was less bright, and open than that of many other amplifiers
- Favors warmth, fullness, and texture in the bass rather than slam and extension
- May not be the most resolving amplifier for the money
Comparisons (according to reviewers)
- The Absolare Hybrid sounded remarkably like the Passion 845 SET, but with deeper bass extension and greater dynamic authority
Takeaway: The Absolare Hybrid Stereo amplifier delivers the emotion of music like an SET amplifier, with the ability to drive a wide variety of loudspeakers. It creates a deep connection with musical meaning.
Video review
Our take on the brand
Absolare pioneered a hybrid amplifier design that combines the warmth of single-ended circuits with the control of push-pull formats, achieving the rare feat of bringing single-ended's signature midrange qualities to a hybrid configuration. Absolare is renowned for its luxuriously designed, leather-wrapped amplifiers and world-class expertise in vacuum tube hifi amplifiers.
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Aavik
Aavik U-580
35000
35000
/
1
Reviews
Aavik Acoustics crafts amplifiers using natural composite materials inspired by musical instruments, with their cabinets designed to enhance audio potential. Their products feature unique noise-cancelling technologies including Tesla coils and dither circuitry, while offering distinctive features like their U-300's input-specific gain adjustment system and the U-380's signature "aged-in-wood" bass sound.
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Product Strengths
- Proprietary noise-control techniques using dither circuits, Active coils, and Tesla coils improve perceived blackness in music
- A 'natural-based composite material' for the chassis aims to reduce influences from mechanical resonance
- A large LED-Matrix display is easy to read from a distance
- A weighty and solid rotary volume dial offers a perfect speed of adjustment
- Input switching is not straightforward, requiring use of a navigate button and rotation of the volume dial
Product Considerations
- Menu navigation is cumbersome, requiring toggling through all items or using the remote control to exit
- The U180 is described as technically correct but not hugely emotional or lyrical, with a darker sound
Takeaway: The Aavik U-series integrated amplifiers offer unique noise-reduction technology and a distinctive design, which could be a great addition to an audiophile's set-up. The amplifier's overall operation is straightforward, and it responds very quickly to all commands.
Video review
Our take on the brand
Aavik Acoustics crafts amplifiers using natural composite materials inspired by musical instruments, with their cabinets designed to enhance audio potential. Their products feature unique noise-cancelling technologies including Tesla coils and dither circuitry, while offering distinctive features like their U-300's input-specific gain adjustment system and the U-380's signature "aged-in-wood" bass sound.
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Goldmund
Telos 690
36250
36250
/
1
Reviews
At the forefront of its design, the Telos 690 addresses the evolving needs of today’s consumers. With an array of digital connectivity options, including USB Audio Class 2.0 interface supporting sample rates up to 384 kHz and a bit depth of 32, as well as Toslink Optical and Digital S/PDIF coaxial inputs, this amplifier effortlessly bridges the gap between traditional high-fidelity audio and modern digital sources.
Goldmund is a Swiss hifi brand known for its "mechanical grounding" technology, which reduces vibrations through heavy, precisely engineered components, and its proprietary Telos amplifier technology that significantly reduces intermodulation distortion. The brand appeals to audiophiles who prioritize pure sound reproduction, focusing on musical realism through minimalist design and high bandwidth circuitss.
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Product Strengths
- Impeccably clean and precise presentation
- Excellent detail resolution
- Sonic agility and dynamic expression
- Good digital module
- Terrific build quality using 12mm thick aluminum alloy panels
Product Considerations
- No phono stage or headphone output
- No indication of the incoming digital signal resolution
- Requires a very solid, high-mass support to work best
- The amplifier's overall character does still veer slightly towards the dry side—particularly at high frequencies
- At this level, balanced connections were expected, but Goldmund hasn't specified them
Comparisons (according to reviewers)
- The soundstage doesn't match the airy spaciousness of the Burmester pre/power
Takeaway: The Goldmund Telos 690 is a highly capable amplifier, known for its clean, detailed sound and dynamic expression. It is a great choice for those who appreciate dissecting recordings and value exceptional build quality.
Video review
Our take on the brand
Goldmund is a Swiss hifi brand known for its "mechanical grounding" technology, which reduces vibrations through heavy, precisely engineered components, and its proprietary Telos amplifier technology that significantly reduces intermodulation distortion. The brand appeals to audiophiles who prioritize pure sound reproduction, focusing on musical realism through minimalist design and high bandwidth circuitss.
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What competes at this price?
Burmester
032
25000
/
Released
With a mighty power supply and a wide variety of connectivity range, the 032 Integrated Amplifier effortlessly delivers complex loads. Excellent resolution and musicality perfectly describe the 032 amp.
Burmester, a high-end audio brand renowned for its German craftsmanship, designs and handcrafts its components in Berlin. Known for its distinctive industrial aesthetic with chrome finishes, the brand supplies premium sound systems for Porsche and Mercedes-Benz.
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Our Summary
Product Strengths
- Music is delivered without perturbation, showcasing a 'grip' on the music
- A beautiful sonic palette is present, with a warm, detailed bass and very smooth, detailed highs
- Understated approach to music replay is pure and precise, without coarseness or grain
- Fabulously well made, with impressive build and finish
- Volume control has a hefty, well-damped but very precise feel to it, and the amplifier's on-board software is quick to respond
Product Considerations
- The headphone output is hidden on the rear panel, making it inconvenient to connect
- Large and heavy (around 40kg), requiring sturdy equipment support and assistance when unpacking
- The combination of heatsinks all-round and reflective chrome front panel may not be to all tastes
- Highly transparent sources and speakers are required to get the best performance
Takeaway: The Burmester 032 integrated amplifier sounds exceptional with refined sound and impressive insight. If the system is talented, this amplifier could be a great match.
Video review
Our take on the brand
Burmester, a high-end audio brand renowned for its German craftsmanship, designs and handcrafts its components in Berlin. Known for its distinctive industrial aesthetic with chrome finishes, the brand supplies premium sound systems for Porsche and Mercedes-Benz.
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AVIDHIFI
Sigsum
20252
/
Released
2022
Driven by sound quality and our uncompromising approach to offer the best in class, the sensational SIGSUM Integrated was conceived. Our single chassis amplifier offers unparalleled performance for those that desire less clutter or with demands on their dwellings.
AVID Hifi is a brand known for its turntables featuring unique engineering like sapphire bearings and dual-stage clamping systems that improve bass grip and soundstage projection. The brand's design philosophy involves developing technology in their high-end models and then adapting it for more affordable products, with their components made from solid aluminum and speakers weighing 100kg for exceptional build quality.
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Our Summary
Product Strengths
- Very low noise floor creates a wide open and clear soundstage with excellent space between each musical element
- Delivers subtle intricate details of music, the decays, and the harmonics
- The built-in phono stage—the Pulsus—provides a clear and clean sound, allowing for a more open and see-through soundstage
- The ALPS RK50 volume knob is satisfying to adjust with its stiff—yet smooth—resistance
- The unit is handmade in the UK
Product Considerations
- Limited number of inputs may not be sufficient for all users
- Lacks a remote control, which may be inconvenient for some users
- Awkward access to the underside cartridge adjustment for gain, resistance, and capacitance may be annoying to adjust
- May emphasize upper vocals, which may not be ideal for all types of music, especially at louder volumes
- The mid/upper bass may be a little shy, lacking the solidity, impact, and warmth that some listeners prefer
Comparisons (according to reviewers)
- The NAD M23 has a bolder, stronger, and punchier bass compared to the Sigsum
- The McIntosh sounds more powerful, solid, secure, and full in terms of tone—and bigger overall—compared to the Sigsum
- The Pulsus phono stage sounds clearer and cleaner than the Avid Pellar phono stage, but the Pellar sounds fuller and thicker
Takeaway: The Avid SigSum is a specialized amplifier that is designed for the audiophile who values the preservation of detail, particularly from vinyl playback. It's a great amplifier to highlight the nuances of music, while offering a clean and precise sound.
Video review
Our take on the brand
AVID Hifi is a brand known for its turntables featuring unique engineering like sapphire bearings and dual-stage clamping systems that improve bass grip and soundstage projection. The brand's design philosophy involves developing technology in their high-end models and then adapting it for more affordable products, with their components made from solid aluminum and speakers weighing 100kg for exceptional build quality.
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McIntosh
MC3500 Mk II
30000
/
Released
2021
Inspired by the amplifier that inspired a generation. There's no denying the historic significance of the 1969 Woodstock Music and Art Fair. There had never been anything like it, and many would argue there's not been anything like it since. With an unexpected crowd of over 400,000 people, there was a lot that could have gone wrong – and some things did. But one aspect that's nearly universally agreed upon was how great all the musicians sounded. That sound quality is thanks in part to the McIntosh MC3500 Vacuum Tube Amplifiers that exclusively powered the sound system used at Woodstock.
McIntosh is one of the most iconic amplifier brands in the world, recognizable for its signature blue LED displays and distinctive industrial design. With a legacy spanning decades, McIntosh is known to many, even outside the audiophile community, and is sold in both mass-market retailers and specialized hifi stores. Their amplifiers are characterized by a warm, tube-like sound that enriches the midrange and smooths out the overall tonal balance.
Expand Details
Our Summary
Product Strengths
- Delivers 350 watts into 2-ohm, 4-ohm, or 8-ohm loads
- The design has a purity that is quite amazing
- Effortless power
- Soundstage is big
- Transparent
Product Considerations
- Not necessarily suitable for pairing with extremely cold sounding, sterile or bright speakers
Comparisons (according to reviewers)
- MC3500 is more open and airy, with base not as hard fisted, compared to Krell KSA 250
- It compares with brands like soulution, big Audio Research, and CH Precision, but at a lower cost
Takeaway: The MC3500 is an impressive amplifier that delivers a natural and pure sound, able to drive almost any speaker. If you're in the market for a McIntosh amp, this is the one that makes music sound pure, simple and unadulterated.
Video review
Our take on the brand
McIntosh is one of the most iconic amplifier brands in the world, recognizable for its signature blue LED displays and distinctive industrial design. With a legacy spanning decades, McIntosh is known to many, even outside the audiophile community, and is sold in both mass-market retailers and specialized hifi stores. Their amplifiers are characterized by a warm, tube-like sound that enriches the midrange and smooths out the overall tonal balance.
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Trafomatic
Rhapsody
24122
/
Released
2022
Rhapsody is the pinnacle of our decades of experience in developing State of the art valve amplifiers. The name itself is the expression of our devotion to the Music and the Art. By definition it implicates the profound roots and legacy to the ancient Greek Art of the rhapsodists in performing Epics, to the most modern compositions, where the one-movement work structure of highly contrasted moods, colours and tonality, is expansive and yet unified in structure.
Trafomatic Audio is unique for crafting its own transformers in-house, which gives them complete control over their amplifiers' sound quality. The brand stands out for using uncommon materials like Panzerholz (hyper-compressed plywood) for resonance control and rare tube types like the Elmac 250TL direct heated triode power tube in their designs.
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Our Summary
Product Strengths
- Delivers a 'silky sheen' characteristic of SET designs, which helps to prevent listener fatigue
- Offers a 'room-filling, full-blown' sound, especially with orchestral music
- The Trafomatic Audio Rhapsody presents an 'expressive' and 'real' dynamic range, creating a live musical experience
- Has an innate sense of melody that draws you into the musical mix, and an over-arching sense of sonic accuracy
- Features auto-biasing and toggles for 'Mesh' and 'Solid' 300B tubes, for enthusiasts who wish to try different valves
Product Considerations
- Limited wattage may restrict loudspeaker choices, requiring pairing with high-sensitivity models
- Bass frequencies exhibit higher distortion at lower power outputs
- The amplifier's modest S/N ratio suggests some mild background hiss may be audible
- Bright red chassis is a fixed color scheme, which may not appeal to everyone
- Reviews of the Rhapsody should be judged as very specific amplifier/speaker combos
Takeaway: The Trafomatic Rhapsody is a class act that draws attention to itself purely through its vivid and real sound. It plays music in such a way that one might never want to listen to anything else.
Video review
Our take on the brand
Trafomatic Audio is unique for crafting its own transformers in-house, which gives them complete control over their amplifiers' sound quality. The brand stands out for using uncommon materials like Panzerholz (hyper-compressed plywood) for resonance control and rare tube types like the Elmac 250TL direct heated triode power tube in their designs.
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Dan D'Agostino
Progression S350
27250
/
Released
2023
The Progression S350 Stereo Amplifier adds a potent stereo option to the Progression family. Leveraging our innovative Super Rail circuitry, the Progression S350 Stereo Amplifier exploits this unique technology delivering remarkable control and fidelity to any connected loudspeaker.
Dan D'Agostino is an ultra-premium hifi brand distinguished by its unique copper heat sinks with holes and distinctive circular green-lit VU meters that give their amplifiers a steampunk aesthetic. Their amplifiers feature proprietary "Super Rail" technology that maintains high voltage for front-end transistors, while their three-chassis Relentless Preamplifier uses 30-pin interlocking connectors to eliminate wiring anomalies.
Expand Details
Our Summary
Product Strengths
- Superb sound quality makes listening to music an event
- Extraordinary frequency extremes with extended, natural-sounding treble
- Epitome of transparency, revealing details in recordings
- Impressive technology, including Super Rail circuitry, enhances dynamics and reduces distortion
- Visually appealing with a Swiss watch-inspired design and a large, responsive power meter
- Balanced-only connectivity might be a limitation for some users, though unlikely with high end preamps
Product Considerations
- Very heavy (115 pounds) and requires assistance to move—lacking handles
- May be overkill for high-sensitivity speakers
Comparisons (according to reviewers)
- The Progression S350 is on the harsher side, while Griffon Diablo 333 is more warm and balanced
Takeaway: The Progression S350 amplifier provides an outstanding listening experience. It has great transparency and reveals lots of detail in the music.
Video review
Our take on the brand
Dan D'Agostino is an ultra-premium hifi brand distinguished by its unique copper heat sinks with holes and distinctive circular green-lit VU meters that give their amplifiers a steampunk aesthetic. Their amplifiers feature proprietary "Super Rail" technology that maintains high voltage for front-end transistors, while their three-chassis Relentless Preamplifier uses 30-pin interlocking connectors to eliminate wiring anomalies.
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