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
- Delivers a smooth, embracing, and euphonic tone, making it enjoyable to listen to for extended periods without fatigue
- Offers excellent detail and ambiance reproduction, resulting in a sublime and neutral sound that pairs beautifully with high-impedance headphones
- Provides a wide and airy sound with neutral tuning, combined with a rich and smooth texture
- The midrange is powerful, vivid, and lively, offering a unique and analog timbre for engaging listening experiences
- Produces a wide, three-dimensional soundstage and lifelike, holographic imaging for an immersive listening experience
Product Considerations
- Lacks power for driving very demanding headphones
- Generates a considerable amount of heat, requiring placement in a well-ventilated area
- Has some coloration in the low-end, which may not appeal to all listeners
- The on/off switch is located on the back panel, which might be inconvenient in some setups
- May not be 'tubey' enough for some users seeking stronger tube coloration
Comparisons (according to reviewers)
- Vs Feliks Audio Envy: It 'hits' differently and is a more budget-friendly option for high-impedance headphone owners
- Vs SMSL SH-X: Both amps generate a lot of heat, but it offers more realistic staging and imaging
- Vs HIFIMAN Prelude: It offers a neutral, dynamic, and colorful sound, while Prelude is smooth, lush, warm, and bassy
- Vs Violectric HPA V340: It provides tube richness, a wider soundstage, and better instrument separation compared to the brighter and harder sound of HPA V340
- Vs Feliks Audio Euforia (original): The Evo delivers more color, contrast, dynamic range, and resolution with better control and lower distortion, especially with hard-to-drive headphones
Takeaway: The Euforia Evo is a tube amplifier that gives music a smooth, rich, and detailed sound. It is great for those who want to experience high-quality audio and enjoy listening to their headphones.
All
Euforia Evo
reviews

Manufacturer details
- Impedance: 100k ohm
- Frequency response: 7 Hz – 80 Khz +/- 3 dB (300 ohm)
- Power output: 280mW
- Amplification level: 20dB
- THD: 0.4 % (300 ohm, 20 mW)
- Optimal headphones impedance: 32 – 600 ohm including planar magnetics
- Headphones output: Jack 6.3mm
- Weight: 7 kg
- Dimensions: 31,3 × 20,3 × 19,3 cm
- AC Voltage: 230V, 120V
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:
- Feliks Audio specializes in crafting Output Transformer-Less (OTL) tube amplifiers, a design choice that emphasizes transparency and direct tube sound.
- Handmade in Poland, Feliks Audio amplifiers combine quality components with point-to-point UPOCC wiring for meticulous construction and signal purity.
- Feliks Audio amplifiers offer extensive tube-rolling capabilities, allowing users to customize the sound signature by swapping both power and driver tubes.
Select products
Echo 2:
- Positioning: Entry-level line, designed for affordability and compactness.
- Description: Offers a warm tube sound with detailed audio. It provides a more accessible price point compared to the Elise, while still delivering high-quality sound, making it suitable for those with a limited budget and smaller room setups.
Elise:
- Positioning: First step into high-end audio with a focus on sound quality.
- Description: Known for its ultra-low noise design and warm tube sound, offering a significant upgrade in sound quality over the Echo 2. It allows for extensive tube rolling and tuning, providing more customization options than the Echo 2.
Euforia Evo:
- Positioning: Mid-range offering with advanced OTL technology.
- Description: Features smooth, neutral, and dynamic sound, making it a perfect match for both dynamic and planar headphones. It offers a more refined sound and build quality than the Elise, with XLR and RCA outputs.
Euforia Anniversary:
- Positioning: Special edition of the flagship Euforia, celebrating 20 years.
- Description: Boasts ultimate OTL technology with single crystal copper wiring for enhanced clarity and smoothness. It surpasses the Euforia Evo in terms of premium components and finish.
Envy:
- Positioning: High-end headphone amplifier and preamplifier.
- Description: A Class A single-ended transformer coupled amplifier, delivering up to 8 Watts of power, ideal for driving demanding headphones. It stands out with its extensive customization options and balanced connections, offering the highest build quality and performance in the lineup.
Our take on the brand
Look inside the brand
Our interview with the brand
What are two key technological innovations or strong opinions that differ you from other brands?
What's your approach to customer support?
What are your favorite tracks for showcasing the strength of your products?
What other products pair best with yours?
Used
Feliks Audio
What if you spend more?
Product Strengths
- Exceptional build quality with a blend of expertly crafted wood and metal, creating a visually striking and durable statement piece
- Dynamic, rich, and effortless sound with excellent detail, texture, and the right amount of tube magic
- Powerful output capable of driving demanding headphones while maintaining clarity and control
- Versatile performance with a variety of headphones (dynamic and planar) due to its output transformer design, often improving sound for warm or neutral headphones
- Value added by its ability to be used as a pre-amplifier in a stereo system
Product Considerations
- Large size and weight (around 15kg) require ample desk space and sturdy furniture
- Generates heat, which could be a concern in warmer environments without adequate ventilation
- Accidental switching of 'On/Off' is possible due to the touch-sensitive bar in the front not being intuitive, so use with care around pets
- Too powerful for some very sensitive IEMs, potentially resulting in overwhelming sound or audible hiss, though this is not the intended design for the amplifier
Comparisons (according to reviewers)
- Vs HIFIMAN Susvara, Envy empowers Susvara's natural presentation while giving it all the dynamics and slam needed
- Vs Cayin HA-300MkII, Envy exhibits more linear mid-to-high frequencies and offers a more transparent sound, while HA-300MkII has a warmer—more engaging midrange
- Vs AURIS Headonia 2A3, Envy performs at the same level, with technically incredibly strong aspects
- Vs Octave V 16, Envy completely demolishes the V 16 when it comes to energy, control, timbre, and resolution
- Vs Ferrum OOR, Envy is more powerful sounding, while also being more detailed with better tonality
Takeaway:
The Felix Audio Envy is a high-end headphone amplifier for audio enthusiasts who want the best quality sound to bring out the magic in their favorite headphones. Its stunning design and versatile performance make it a worthwhile addition to any serious audiophile setup.
Video review
Our take on the brand
Video review
Our take on the brand
Ahead of the curve Trilogy has opted to fittingly make the first Special Products Division a component where nuance and tangibility is etched in fine detail - the electrostatic headphone energiser. A fitting first statement product for Trilogy Audio Systems SPD range, built with meticulous sonic craftsmanship.
After trialling variations of the Stax circuit used by many other manufacturers Nic Poulson realised that accepted wisdom and circuitry failed to advance the product to Trilogy design goals, to only ever evolve and improve. The SPD H1 circuit is unique in terms of a solution.
The design consists of two toroidal transformers, one for heating the triodes, the other for the rest of the H1. The vacuum tube circuit utilises high transconductance type military specification tubes. One pair of 6C3 input tubes and one pair of 6H6 output tubes, having a service life of approximately 5000 hours and can simply be returned to Trilogy for replacement.
The H1 is a pure Class A fully balanced circuit with both wide bandwidth and zero feedback giving a pure communication between the listener and the music. Naturally on this no compromise design wiring is teflon coated point to point silver plated copper. The Stax sockets are PTFE/Teflon with gold plated contact surfaces.
The H1 provides palpable bass and a forthright and authoritative midrange, in addition to the quality airiness that electrostatic headphones are so renowned for. The ephemeral yet conversely frustrating qualities of the traditional experience of electrostatic headphone presentation have been addressed. It has taken time to reverse conventional thinking, but the result was worth it. Experience the openness and pure escapism the H1 provides.
To the rear the SPD H1 features 4 inputs/ 2 x RCA 2 x XLR, and one pair of Stax sockets elegantly recessed into the front fascia. We make a direct mode model (DMV) which allows the user to select inputs remotely and a more fully functioned remote that includes additional operations as volume/balance and mute. The direct mode model (DMV) may be upgraded to the full featured remote version by simply returning to Trilogy for chip and firmware updates.
As with any Stax compatible energiser Performance is dependent on the quality of the source i.e. CD players analogue output stage, and quality of other manufacturers digital volume controls, but the buyer of the H1 rest assured that Trilogy once again, has redefined the standard by which Stax compatible energisers must be judged by and must be experienced to be believed.
Product Strengths
- Possesses the transparency, resolution, detail retrieval, and coherency of an electrostatic rig combined with the musicality of a single-ended triode amplifier
- Tone and timbre are natural, beautiful, rich, and edible
- Exceptional volumetric cube (soundstage) and ability to render depth and width
- Reveals space via endless microdynamic details, nuance, and spatial cues, creating a 'you-are-there' experience
- Svelte and aesthetically clean design, available in black or silver, with a minimalist front facade
Product Considerations
- Sub-bass reach is a limitation; it expertly handles mid and upper bass, and even the initial steps of the deep bass regions remarkably well, though not the deepest bass
Comparisons (according to reviewers)
- Vs Viva Egoista STX: The Trilogy H1 did not offer the incredible clarity or openness of the Viva Egoista STX, but it was closer in quality than expected
Takeaway: The Trilogy H1 Energizer combines electrostatic capabilities with single-ended triode qualities, resulting in a sublime musical experience. It brings forth music with exceptional detail and a delicious tonality, making it a remarkable first electrostatic product from Trilogy.
Video review
Our take on the brand
Product Strengths
- Improves the performance of headphones, making them sound better
- Images become larger and more distinctly tactile
- Delivers credibility and immersivity, putting headphones into the same ballpark as a good stereo
- Elegant and compact design
- Considered by some to represent the pinnacle of headphone amplification in design and execution
- Placement of RCA's are so close that any high-end RCA cable that has any kind of larger jack assembly will simply not plug in over-and-under into the same-numbered set
Product Considerations
- Some softening of bass impact in comparison to others
- Least apparent power
- Balanced outputs were not included in the original design
Comparisons (according to reviewers)
- Vs HeadAmp GSX Mark II—the E.A.R. has better tone/timbre, imaging, and stereotypical tube benefits to soundstage; HeadAmp has 'blackest' backgrounds, with deepest apparent reach to the bass
- Vs Cavalli Audio Liquid Gold—the E.A.R. has better tone/timbre, imaging, and stereotypical tube benefits to soundstage; Cavalli has widest/tallest sound stage, with best specificity of placement
Takeaway: The EAR HP4 headphone amplifier is a top-tier product with elegant design that elevates the listening experience by improving headphone performance and creating immersive sound. It is an amplifier that inspires listening and immersion in music.
Video review
Our take on the brand
What competes at this price?
Our Summary
Product Strengths
- Offers a comprehensive and flexible specification, functioning as a headphone amplifier and streaming preamp
- Produces superb sound quality, described as clear, pure, detailed, dynamic, and musical, without being overly analytical, regardless of genre or recording quality
- Features a well-made, elegant, and attractive design with a beautiful screen for album art and a satisfying volume control
- Supports a comprehensive range of streaming services and digital formats including AirPlay 2, Chromecast, Spotify Connect, Tidal Connect, Qobuz, Bluetooth, UPnP, and Internet Radio, and is Roon Ready
- Intuitive and stable app, especially for those who know what they want to listen to
Product Considerations
- The price is high relative to other headphone amplifiers/DACs on the market
- The front display is not a touchscreen
- Some might prefer a more analytical sound presentation
- The HDMI ARC connection is absent
- The Naim app lacks polish compared to dedicated music apps
Comparisons (according to reviewers)
- Vs Cambridge Audio Evo 150 and NAD M10—the Uniti Atom Headphone Edition is specifically focused on headphone use
- As a headphone amp, it is every bit as good as the Chord Hugo TT2
- Naim puts less of itself into the performance as opposed to McIntosh MHA200
Takeaway: The Uniti Atom Headphone Edition is a great self-contained system for headphone listening, with an easy-to-use interface and a beautiful design. It is a quality product that can be a centerpiece for your home audio.
Video review
Our take on the brand
Our Summary
Product Strengths
- Versatile amplifier that breathes life into a wide range of headphones
- The purity of the sound creates a very natural tonality and a very organic experience in general
- Incredible depth, note separation, and holography, with a soundstage that envelops the listener
- Connectivity options...
Product Considerations
- It runs hot and needs space to breathe, as it is a class A amplifier
- Its hefty size (10kg) might be too much for a small desk
- Hifiman Susvara users might want to look for another amplifier
Comparisons (according to reviewers)
- Pass Labs HPA-1 has an unmistakably organic feel, while Bliss leans more towards a very clean and pure neutral presentation
- Holo Bliss brought a new level of energy and control to the music, while refining the details and presenting them in a purer, more organic way
- Compared to Felix Audio Euphoria Anniversary Edition, a little of that black background is lost, and more of a sunset feel is gained, with more of a lush midrange akin to the characteristics of the Tube
Takeaway: The Holo Audio Bliss is a versatile and powerful amplifier that delivers an exceptional listening experience, with a focus on purity, holography, and natural tonality, making music vibrant and captivating. With its top-notch build quality, it's designed to be the heart of any high-end audio setup.
Video review
Our take on the brand
Our Summary
Product Strengths
- Unique design, with transformers isolated to prevent power supply interference, while maintaining a desktop-friendly size
- Aims to provide a balanced and natural sound with a wide dynamic range, particularly evident in Pure Direct mode
- Measures excellently, with a very low noise floor, excellent crosstalk, and wide dynamic range, making it very precise and rich in detail
- Can also function as a DAC/preamp with analog inputs and pre-outs, allowing the user to assemble a high-end head-fi system with one device
- Offers great connectivity options, including balanced (4.4mm and XLR) and unbalanced (6.3mm) headphone jacks, as well as a comprehensive selection of rear inputs like analog, digital, coaxial, and USB
Product Considerations
- The design may not appeal to everyone, described as more 'functional' than flashy
- High-sensitivity IEMs may have audible noise
- There is no balanced input
- There is clumsy placement of buttons for variable/fixed line output
Comparisons (according to reviewers)
- The unit's sound field technology is compared to that used in Yamaha's AV receivers
Takeaway: The HA-L7A is a uniquely designed headphone amplifier packed with features and connectivity that can deliver high-quality audio. If you want to drive power-hungry headphones and desire Yamaha's sound signature, the HA-L7A could be a good choice.
Video review
Our take on the brand
Our Summary
Product Strengths
- Amazing touchscreen, which is very responsive
- ESS filter makes it very incisive, very robust in bass, and provides crystalline clarity at its price point
- Digital filters matter and are well done, changing the sound subtly but noticeably, allowing for customization
- Mad resolving, as resolving as any DAC around the $5,000 price point
- Good spatial holography with good lateral imaging and separation, and the ability to layer the sound quite well in the depth dimension
Product Considerations
- May require a firmware update upon arrival to resolve issues such as sleep mode malfunctions
- More sensitive to noise and ground loops than other DACs
- Single-ended output has reduced quality compared to balanced output
- ESS filter can make the sound a little brighter
Comparisons (according to reviewers)
- The Holo Spring has a wider soundstage, but it is more resolving; it has a tighter bass than the Spring
- Compared to the Denafrips Venus, it is more upfront and dynamic with better bass and mid-range clarity
Takeaway: It is a DAC that has an amazing touchscreen and filters, which makes it incisive and robust in bass. Its detailed sound and customization options can help one get the sound they like.
Video review
Our take on the brand
Our Summary
Product Strengths
- Impressive specs and features, satisfying many headphone listening needs
- Employs a discrete design with FET input and balanced Class-A power amp circuit, which runs surprisingly cool
- Delivers impressive signal-to-noise ratios on both single-ended and balanced outputs (115dB and 118dB, respectively)
- Features adjustable headphone output impedance (Low-Z, 10 Ohm, and 47 Ohm) to fine-tune sound based on headphone and music genre
- Includes tone controls (+/-12dB adjustment of bass, mid, and treble) that can be bypassed for purists
Product Considerations
- The encoder dial is on the shallow side, which may present a challenge for people with larger fingers
- Does not have XLR preamp outputs, which could be a limitation for some users
- The crossfeed circuit is a simple on/off affair, offering no fine-tuning options
Comparisons (according to reviewers)
- Sounds very similar to Sparkos Labs Aries in tone, texture, timing, and imaging
Takeaway: The M2Tech Marley MkII is a versatile headphone amplifier with many features, and it provides a high level of performance. It allows the listener to adjust the sound to their preferences and to make the most of their headphones.
Video review
Our take on the brand
How to buy
Amplifiers
Search all hifi products
Explore our database of 10,000+ new and 25,000+ used hifi products.



































