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Cameron Oatley
ExtremeHiFi
Website author headshot
Julian Shapiro
ExtremeHiFi

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

  • 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.

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

H1Energiser

reviews

[{"title":"TRILOGY H1 ENERGIZER - REVIEW","link":"https://www.audiokeyreviews.com/the-reviews/trilogy-h1-energizer","source":"audiokeyreviews.com","datePublished":""}]
An excellent review of a great product
/
Publisher
/
3/1/2022
An excellent review of a great product
Publisher
/
3/1/2022

Manufacturer details

  • Size: 26039288 (WDH)
  • Size including connectors: 26040588 (WDH)
  • Weight: 6.7Kg
  • Packaged Size (combined): 590510260
  • Packaged Weight (combined): 9.2 Kg
  • Power consumption: 55 Watts
  • Power consumption (standby): 1 Watt
  • Inputs Balanced: 2 pairs of XLR 3pin female
  • Inputs Single Ended: 2 pairs of RCA phono sockets
  • Input Impedance Single Ended: ≥33KOhms
  • Input Impedance Balanced: ≥66KOhms
  • Gain (max): 56dB
  • Frequency response: 10-50KHz +/- 0.5dB
  • Valve Complement: 4 6C3PI, 2 6H6PI
  • Phase: Phase correct (non inverting)
  • Bias Voltage: 580VDC
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.
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 tha...
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:

  • Trilogy stands out for its unique hybrid amplifier designs, expertly blending the strengths of both valve and solid-state technologies to achieve a musically fluent sound.
  • The brand's products boast exceptional build quality, characterized by meticulously machined aluminum casework and high-end internal components, reflecting a commitment to both aesthetics and longevity.
  • Trilogy integrates sophisticated, user-friendly control systems with features such as customizable input settings, temperature monitoring, and programmable timers to enhance the overall user experience.

Integrated Amplifiers  

  • Positioning: A complete solution geared toward users seeking quality sound in smaller setups with a simple, all-in-one design.  
  • Description: Offers a modern circuit design that delivers clear audio and low distortion while being mindful of cost and simplicity for everyday use in small rooms. In comparison to the separate preamplifiers and power amplifiers, it provides integrated functionality that requires fewer components, making it ideal for those with moderate budgets and basic functionality needs.

Preamplifiers  

  • Positioning: A dedicated control unit designed for users who want finer audio signal management and room-tailored adjustments.  
  • Description: Offers an advanced signal processing design that enhances clarity and tone control through refined circuitry, ideal for achieving detailed sound in medium to large spaces. Compared to the integrated amplifiers and power amplifiers, it focuses on precise control and versatility.

Power Amplifiers  

  • Positioning: A high-performance output stage aimed at users who demand robust sound power and dynamic drive for larger spaces.  
  • Description: Offers a design with modern output stages and solid build quality that ensures high power output and low distortion for demanding sonic setups. In comparison to the integrated amplifiers and preamplifiers, it stands out for its ability to drive large speakers in big rooms.
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Avg. Product Price
$5,001-$10,000
Used For Sale
2
 Available (Scroll Down)
Brand Popularity
318
 of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
11
Founding Year
1992

Our take on the brand

Trilogy Audio is a UK-based hifi brand known for its hybrid amplifier designs that combine valve and solid-state technologies, with their products featuring CNC-milled aluminum construction and microprocessor control for customization. Their amplifiers use virtually feedback-free valve-based amplification and true choke input power supplies, setting them apart from conventional designs in the industry.

Look inside the brand

Brand Page

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?

From our interview with
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Brand Page

Used

Trilogy

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What competes at this price?

Feliks Audio
Envy
7345
/
Released
2022
Class A Single-ended transformer coupled, balanced amplifier, powered by the legendary 300B tubes
Check Amazon
Feliks Audio is a Polish brand that handcrafts tube amplifiers, including their flagship Envy model which features single-crystal copper wiring and 300B tubes known for their linearity and low distortion. Their amplifiers stand out for their ability to drive both high-impedance dynamic and planar magnetic headphones, which is uncommon among tube amplifiers, while maintaining a low noise floor and delivering natural, warm sound.
Expand Details

Our Summary

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

Feliks Audio is a Polish brand that handcrafts tube amplifiers, including their flagship Envy model which features single-crystal copper wiring and 300B tubes known for their linearity and low distortion. Their amplifiers stand out for their ability to drive both high-impedance dynamic and planar magnetic headphones, which is uncommon among tube amplifiers, while maintaining a low noise floor and delivering natural, warm sound.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page
Playback Designs
Merlot
8811
/
Released
2023
Integrated DAC / Headphone Amp Up to 384kHz PCM and up to 11.2MHz DSD USB, AES, Coax, PLink inputs USB compatibility with Windows, Apple OS, Linux Headphone output with separate volume control Balanced and unbalanced line level outputs Differential discrete DAC (standard "Playback Designs" architecture)
Check Amazon
Playback Designs, founded by DSD pioneer Andreas Koch, stands out for using custom-programmable FPGA chips instead of standard DAC chips, and for converting all digital inputs to DSD format to reduce distortion. The brand's 1-bit DACs feature their proprietary PLINK optical connection system to isolate from electrical noise, along with separate power supplies for each channel, helping make even lower-resolution files sound exceptionally good.
Expand Details

Our Summary

Video review

Our take on the brand

Playback Designs, founded by DSD pioneer Andreas Koch, stands out for using custom-programmable FPGA chips instead of standard DAC chips, and for converting all digital inputs to DSD format to reduce distortion. The brand's 1-bit DACs feature their proprietary PLINK optical connection system to isolate from electrical noise, along with separate power supplies for each channel, helping make even lower-resolution files sound exceptionally good.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page
EAR Yoshino
EAR HP4
6043
/
Released
Designed for the highest fidelity in headphones. Using four 6SL7 valves for the clearest of sound. Developed for studio use with the ability to drive any headphones with one watt of power utilising an enhanced triode mode circuitry.
Check Amazon
EAR Yoshino is a British hifi brand where each product is handmade from start to finish by a single engineer, with their amplifiers featuring a unique balanced bridge mode output stage design that assigns separate windings to each electrode on the output transformer. Their tube-based equipment, inspired by founder Tim de Paravicini's professional recording studio experience, is used by renowned artists like Pink Floyd and Mobile Fidelity Sound Labs.
Expand Details

Our Summary

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

EAR Yoshino is a British hifi brand where each product is handmade from start to finish by a single engineer, with their amplifiers featuring a unique balanced bridge mode output stage design that assigns separate windings to each electrode on the output transformer. Their tube-based equipment, inspired by founder Tim de Paravicini's professional recording studio experience, is used by renowned artists like Pink Floyd and Mobile Fidelity Sound Labs.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page

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