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
Magazine reviewers and YouTubers have tried this product—so we've summarized their strongest opinions below.
Product Strengths
- Uses GaN (Gallium Nitride) MOSFET transistors for fast switching speed and high efficiency
- Compact size and low heat output compared to traditional amplifiers
- Offers 'tube rolling' capability by allowing users to swap out the GaN MOSFET power amplification unit within the glass tube
- Delivers a detailed and clear sound, with some reviewers noting a near-neutral presentation
- Impressive bass control, grip, and texture, especially considering its size
Product Considerations
- Some reviewers noted a lack of visceral weight in the low frequencies compared to higher-powered Class A/AB amplifiers
- One reviewer found brushes on jazz recordings to be irritating due to the amplifier's detailed and neutral presentation
- The aesthetic, while attractive to many, may confuse those strictly on either the tube or transistor fence
Comparisons (according to reviewers)
- Vs PS Audio BHK300: The Audion offered greater definition in the bass, while the BHK shook the room more with bass energy
- Vs Gryphon Essence: The Audion has a lighter disposition than the Gryphon, bringing a sense of openness with a sprinkling of sweetness
- Vs Merrill Audio Element 116: The Audion comes close to the sound quality of the Merrill Audio Element 116 monoblocks
- Vs AGD Vivace: The Audion achieves as much prominence in the bass as that larger amp did with its greater power supply
Takeaway: The AGD Audion is a compact and efficient amplifier that delivers high-quality sound with exceptional detail and control. Its unique design and 'tube rolling' capabilities offer a compelling option for audiophiles seeking a modern take on amplification.
How useful are hifi reviews? We consider them useful for three things: (1) Surfacing new products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've ever heard (this means they probably are legitimately great). (3) Identifying a product's unique attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we discount what reviewers say because they heap praise on everything—rarely being negative for fear of souring relationships with manufacturers. Further, they seldom have more than a couple products on-hand at once, relying on their imperfect memories to compare to past products.
Video Review
Compared to their other products
We think it's helpful to understand how this product fits into the brand's full lineup (below). To learn more about these products, visit the brand's page.
ALTO
- Positioning: A compact reference preamplifier designed as an ideal partner for AGD's power amplifiers.
- Description: Features a fully balanced analog phono stage with a precise resistor ladder volume control in a single billet aluminum chassis. Offers straightforward functionality, making it suitable for small setups compared to the Andante's advanced digital-analog mix and the power-focused designs of the TEMPO, AUDION, and GRAN VIVACE.
ANDANTE
- Positioning: A high-end hybrid preamplifier that integrates analog and digital circuitry for critical listening.
- Description: Provides a 100% discrete R2R DAC with improved clock stability, galvanic isolation, and an enhanced phono stage to deliver finer detail. Compared to the compact simplicity of the Alto and the power-enhancing roles of the TEMPO and AUDION, the Andante suits users who demand more technical sophistication and comprehensive connectivity for both analog and digital sources.
TEMPO
- Positioning: An entry-level stereo power amplifier that uses modern GaN technology.
- Description: Uses a GaN-based power stage with high PWM frequency operation, ensuring efficient and low-noise performance in a compact CNC-machined cabinet.
AUDION
- Positioning: A compact monoblock amplifier that combines quick switching and precise power delivery in a minimalistic design.
- Description: Uses Gallium Nitride MOSFET power stages enclosed in a glass tube to deliver 200W with low noise and fast response characteristics. Unlike the TEMPO's stereo design and before the premium GRAN VIVACE, the AUDION offers a step-up in performance.
GRAN VIVACE
- Positioning: A flagship monoblock amplifier built for high-end systems and demanding loudspeaker setups.
- Description: Features dual 600V GaN MOSFETs switching at 800kHz, delivering high peak output and exceptional current drive capability. Compared to the AUDION and TEMPO, the GRAN VIVACE stands out with its advanced thermal design and highest power output.
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Read the 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
Audion
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Manufacturer's notes
The new AGD "THE AUDION MkIII" is one of the most Compact Amplifier designs in Hi-End Audio. "THE AUDION" Monoblock uses the unique GaNTube™ technology with Gallium Nitride MOSFET-based Output Power-Stage, fully enclosed in a Glass Tube.
The new AGD “THE AUDION” MkIII is one of the most Compact Amplifier Design in Hi-End Audio. “THE AUDION” Monoblock uses the unique GaNTube™ technology with Gallium Nitride MOSFET based Power-Stage, fully enclosed in a Glass Tube.
Manufacturer Specs
- Output Power: 200W 4Ω
- Dynamic Range: >120dB
- Dimensions: 7.5" × 5.5" x 7.5" (190x140x190mm)
- Weight: 6.5lbs (3kg)
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Average Price
$5,001-$10,000
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Brand Popularity
148
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Products
9
Founded
2015
Our take on the brand
AGD Productions uses GaN (Gallium Nitride) technology in their amplifiers, which are housed in glass tubes reminiscent of classic vacuum tubes, delivering high power from a compact size with near-perfect square waves. The amplifiers are designed to be upgradeable as technology advances, with GaN modules that can be replaced, while handling complex impedance loads similar to high-end Class-A or SET tube amps.
Brand Page
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What if you spend a bit more?
Duet
11500
11500
/
7
Reviews
AGD
The AGD DUET Monoblock Amplifier, is the newest addition to our state of the art Hi-End Power Amplifiers family. The AGD DUET is our first compact Monoblock Amplifier utilizing 100% Gallium Nitride Power MOSFET design for both the output power stage and the power supply.
AGD Productions uses GaN (Gallium Nitride) technology in their amplifiers, which are housed in glass tubes reminiscent of classic vacuum tubes, delivering high power from a compact size with near-perfect square waves. The amplifiers are designed to be upgradeable as technology advances, with GaN modules that can be replaced, while handling complex impedance loads similar to high-end Class-A or SET tube amps.
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Our Summary
Product Strengths
- Compact size, lightweight, and runs cool compared to traditional high-end amplifiers
- Exceptionally quiet operation, with reviewers noting a complete absence of hum or buzz
- Delivers a clean, crisp, and neutral sound signature without added coloration
- Upgradeable design, allowing users to update the amplifier with new GaN modules as technology evolves
- Produces a Single Ended Triode-like midrange and top end
Product Considerations
- The polished finish is a fingerprint magnet, requiring the use of gloves for handling
Comparisons (according to reviewers)
- Vs AGD Audion MKIII: The Duets offer a cleaner and more refined sound with improved bass and greater immediacy and snap compared to the Audion MKIII
- Vs Daniel Hertz Maria: The AGD Duets seem to have a little more inner resolution
- Vs Pass Labs X250.8: The AGD Duets performed to a higher level
- Vs Peachtree GaN 1/VTV GaN amps: AGD amps seem to be on another level in regards to design, and the sound is more refined and beautiful
- Vs Aavik U-150, Luxman 595, Yamaha A-S 3200, Axxess Forte 1, Line Magnetic 219ia: The AGD Duets performed to a higher level
Takeaway: The AGD Duet amplifiers offer a blend of cutting-edge technology, exceptional sound quality, and user-friendly design. They are a great option for those seeking a high-end audio experience in a compact and energy-efficient package.
Video review
Our take on the brand
AGD Productions uses GaN (Gallium Nitride) technology in their amplifiers, which are housed in glass tubes reminiscent of classic vacuum tubes, delivering high power from a compact size with near-perfect square waves. The amplifiers are designed to be upgradeable as technology advances, with GaN modules that can be replaced, while handling complex impedance loads similar to high-end Class-A or SET tube amps.
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Duet
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Product Page
Element 110
14000
14000
/
5
Reviews
Merrill
Merrill Audio's amplifiers use Gallium Nitride (GaN) transistors and a proprietary Zero Crossing Open Loop design that eliminates feedback, enabling extremely fast switching with low distortion. Their amplifiers achieve exceptional transparency through an ultra-low noise floor and advanced PCB design techniques that minimize parasitic effects.
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Our Summary
Product Strengths
- Able to drive reference Sound Lab electrostatic speakers effectively
- Designed and developed under Merrill's 'Project Oganesson', highlighting their sonic abilities and the methods used to achieve them
- The exterior looks good, especially the brightly colored front panel 7' Capacitive Touch Screen Display (CTSD)
- Complete transparency and lack of colorization
- Gaia III's feet from isoAcoustics were hand selected for their superior dampening and to isolate the amplifiers from surrounding vibrations
Product Considerations
- Not a member of the 'easily affordable' high-end audio equipment club
- There is no power switch
- These amplifiers are designed to be powered on and left on
Comparisons (according to reviewers)
- Element 110 is a scaled-down version of the Element 116, using lower-priced components, heatsinks, and other constituents, and lower power, but it has the same transient response
- The Element 110 monoblocks did not scale the same sonic heights as the Element 118s, but the Element 110 monoblocks have many characteristics that impressed
Takeaway: The Merrill Audio Element 110 is an impressive amplifier that delivers music with transparency and without unwanted coloration. It is a powerful and efficient choice for audiophiles looking for high-quality sound reproduction.
Video review
Our take on the brand
Merrill Audio's amplifiers use Gallium Nitride (GaN) transistors and a proprietary Zero Crossing Open Loop design that eliminates feedback, enabling extremely fast switching with low distortion. Their amplifiers achieve exceptional transparency through an ultra-low noise floor and advanced PCB design techniques that minimize parasitic effects.
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Element 110
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Product Page
Ultima
15375
15375
/
8
Reviews
Chord Electronics
Chord Electronics designs and manufactures all their products in Great Britain, setting themselves apart by using proprietary FPGA technology instead of off-the-shelf DAC chips found in most competitors' products. Their DACs and portable audio devices, featuring distinctive color-changing buttons and portholes, deliver studio-grade performance through unique technologies like the Watts Transient Aligned filter, which provides more natural and detailed sound reproduction.
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Our Summary
Product Strengths
- Offers a remarkably smooth, unforced, and natural presentation with a touch of warmth
- Excels in detail retrieval and textured presentation of instruments and vocals, making the music feel alive
- Presents a wide and holographic soundstage, especially when paired with speakers that are already strong in this area
- Demonstrates agility, precision, and clarity, combined with a naturalness that eluded earlier generations of Chord amplifiers
- Scales dynamically and has the ability to punch hard when required
Product Considerations
- Has a minimalist design with just four line-level inputs, lacking features like phono stages, tone controls, headphone outputs, or DAC modules
- Some may find its sonic signature prioritizes articulation over qualities such as richness and authority, potentially sounding thin if partnered poorly
- Balance control has no center indent or marked position
- The polychromatic lighting may be an issue for the color-blind
- Remote operation can be affected by direct sunlight
Comparisons (according to reviewers)
- Vs Rega Elex-R Mk3, the Chord Ultima Integrated delivers undeniably elevated sound in all respects, with greater dimensionality and smoother vocals
- Vs Bryston 7B 3 monoblocks, the Chord Ultima Integrated offers a weightier and more thunderous delivery, especially in the midrange and vocals, with more inner warmth in tone
- Vs Benchmark AHB2, the Chord Ultima Integrated provides a more energetic and fun listening experience, with Thor-like bass impact and overall superior dynamics
- Vs Accuphase E-270, the Chord Ultima Integrated is warmer, rounder, more powerful, and refined, with a more fluid and emotionally engaging performance
Takeaway: The Chord Ultima Integrated is a unique and well-built amplifier that combines a visually pleasing design with a captivating sound, full of detail and dynamic precision. It brings music to life with an engaging and immersive experience, making it a worthy addition to any audiophile's setup.
Video review
Our take on the brand
Chord Electronics designs and manufactures all their products in Great Britain, setting themselves apart by using proprietary FPGA technology instead of off-the-shelf DAC chips found in most competitors' products. Their DACs and portable audio devices, featuring distinctive color-changing buttons and portholes, deliver studio-grade performance through unique technologies like the Watts Transient Aligned filter, which provides more natural and detailed sound reproduction.
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Ultima
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Product Page
Emitter II
18750
18750
/
6
Reviews
ASR
The Emitter II models are considered by real music connoisseurs and uncompromising audiophiles to be the ultimate in amplifier construction. Almost purely by hearsay, a music-addicted and ever-growing fan base has developed worldwide, which has realized its dream of a concert hall in its own home.
Powered by two separate power supplies, the most sophisticated loudspeakers and elaborately constructed dynamic converters are driven to peak sound performance. With an Emitter II Basic, music unfolds in the full dynamic range. From the breath to the slightest rustle on the stage to the power of the full orchestra, the Emitter II Basic reproduces all tones neutrally, powerfully, energetically, with high resolution and unadulterated in the listening room.
Especially at peak levels at concert volume, the playback and spatial imaging remain absolutely stable. Quiet listeners also rave about the noticeable and very pleasant energy in the sound, which makes the music a relaxing and pleasant experience even at low levels.
ASR Audio's Emitter II Exclusive amplifier creates a vast, tube-like soundstage and three-dimensional presentation without tube colorations, while maintaining exceptional transparency and a low noise floor. The brand stands out for its emphasis on measurements and scientific analysis in audio equipment evaluation, often sparking debates between measurement-focused and subjective listening-focused audiophiles.
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Our Summary
Product Strengths
- Known for combining the musicality of tube amplifiers with the precision and power of solid-state amplifiers.
- It provides a transparent sound with steel control, without the electronic 'shine' associated with transistor amplifiers.
- Exceptional bass performance, described as deep, explosive, and completely controlled.
- Homogeneous frequency range, offering a very high degree of transparency and control.
- Offers an ability to resolve even the finest musically significant details.
Product Considerations
- Requires a substantial amount of space due to its multi-component design.
- The sound offered might be 'too beautiful' for some listeners, as it is not 'brutal' or 'terse' enough.
- Requires care in using its switches to avoid shutdowns.
- Some reviewers note it was 'dark sounding' on the highs, though it did not lack information.
Comparisons (according to reviewers)
- Compared to Quad ESL loudspeakers, it surpasses the musicality and clarity achieved with many tube amps, rivaling even high-end options like Lamm Industries ML2.2 and Miyajima Laboratory 2010.
- The ASR has better bass and is more transparent than MBL, however, it lacks the grace that MBL offers.
- Compared to Rogue 180W monoblocks, the ASR Emitter II delivers better bass.
- The ASR Emitter II has slightly better bass control than Manley Neoclassic 500, but the Neoclassic 500 has a more marvelous style of fiddling.
- Compared to Edge and Audio Research, the ASR is darker sounding.
Takeaway: The ASR Emitter II Exclusive offers a combination of tube-like warmth and solid-state precision, making the listening experience a very involving one. It provides exceptional control and detail across the entire frequency range, making it a great choice for audiophiles.
Video review
Our take on the brand
ASR Audio's Emitter II Exclusive amplifier creates a vast, tube-like soundstage and three-dimensional presentation without tube colorations, while maintaining exceptional transparency and a low noise floor. The brand stands out for its emphasis on measurements and scientific analysis in audio equipment evaluation, often sparking debates between measurement-focused and subjective listening-focused audiophiles.
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Emitter II
page
Product Page
What else competes at this price?
Tempo di GaN
5500
/
Released
2021
AGD
AGD Productions uses GaN (Gallium Nitride) technology in their amplifiers, which are housed in glass tubes reminiscent of classic vacuum tubes, delivering high power from a compact size with near-perfect square waves. The amplifiers are designed to be upgradeable as technology advances, with GaN modules that can be replaced, while handling complex impedance loads similar to high-end Class-A or SET tube amps.
Expand Details
Our Summary
Product Strengths
- GaN technology allows for efficient power usage, with 94% of energy being turned into sound
- Compact size challenges the notion that high-quality amps need to be large
- Design and packaging create pride of ownership
- It can be run in bridged mode to deliver 400 watts into one channel
- Stability and ability to handle complex impedance loads
Product Considerations
- The slight sonic signature may not be for everyone
- If truly outrageous amounts of power are needed to drive speakers, a second AGD Tempo amp might be needed to run in a bridged configuration
- High-frequency noise was discovered when XLR cables were not connected between them
- Power cords can make a large difference, the included power cord doesn't flatter the amp
- Some traditionalists may find it hard to accept that it's a Class-D amplifier
Comparisons (according to reviewers)
- Compared to Peachtree Audio GaN400, the AGD Tempo reports to have better overall specifications
- Compared to Parasound Halo A21+, the AGD Tempo is simply superior
- Compared to Bricasti M30 monoblock amplifiers, the level of which the most subtle detail exists approaches reference Bricasti M30 monoblock amplifiers
Takeaway: The AGD Productions Tempo is a cutting-edge amplifier that offers a new take on audiophile amplification and rivals more expensive amplifiers. It can drive speakers easily while being energy efficient.
Video review
Our take on the brand
AGD Productions uses GaN (Gallium Nitride) technology in their amplifiers, which are housed in glass tubes reminiscent of classic vacuum tubes, delivering high power from a compact size with near-perfect square waves. The amplifiers are designed to be upgradeable as technology advances, with GaN modules that can be replaced, while handling complex impedance loads similar to high-end Class-A or SET tube amps.
Visit
Tempo di GaN
Page
Product Page
A35.8
5247
/
Released
2022
Primare
The A35.8 is Primare's most powerful and flexible multi-channel amplifier, designed to serve the needs of virtually any high-performance multi-channel system through its ability for each pair of channels to be bridged to mono for an incredible level of power delivery and system building options, including 1500 watts of total output in a fully bridged bi-amped stereo configuration.
Primare is a Scandinavian hifi brand whose UFPD 2 Amplification technology provides a consistent 26dB feedback loop gain across the entire audio range, making their amplifiers exceptionally stable and accurate. Their modular design approach lets users customize their systems by adding or upgrading components like DACs and network modules.
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Our Summary
Product Strengths
- The A35.8 provides eight channels of 'unimpeachable Class D power in a fairly compact and very flexible package'
- Flexible configuration options for power output to speakers are available, such as bi-amping and bridging
- Each stereo pair can be bridged separately to make four times 375 watts (8 Ohms) from the eight times 150 watts
- Fault-free sound quality
- High quality fit and finish
- The A35.8 offers flexible connectivity options
Product Considerations
- The 20-amp power inlet is the seldom-seen variety with three horizontal blades
- The speaker output posts are spaced too widely for dual-banana plugs
- Cabling can be tricky
- A high current power cord is needed
- Lower gain is present, though this doesn't necessarily need to be an issue
Comparisons (according to reviewers)
- Vs NAD M28, the A35.8 gets you one more channel and more versatility for a 10% price increase
- Vs Benchmark AHB2, the Benchmark presented a more neutral tonal balance and undistorted soundstage
- Vs NAD C 298 stereo amplifiers, the Primare seemed slightly more forward, often conveying an appealing liveliness
Takeaway: The A35.8 power amplifier is a flexible and versatile product worth considering for anyone seeking a high-quality multi-channel setup. Its ability to bridge channels offers many ways to configure your speaker system.
Video review
Our take on the brand
Primare is a Scandinavian hifi brand whose UFPD 2 Amplification technology provides a consistent 26dB feedback loop gain across the entire audio range, making their amplifiers exceptionally stable and accurate. Their modular design approach lets users customize their systems by adding or upgrading components like DACs and network modules.
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A35.8
Page
Product Page
Integrated (Single)
8995
/
Released
Java Hi-Fi
Java HiFi stands out for using GaN FET transistors in their Class D amplifiers and LDR (Light Dependent Resistor) technology in their preamp stage, with the latter controlling volume through varying light intensity for a purer audio path. Their amplifiers deliver high power with remarkably low distortion while challenging the typical limitations of Class D technology, producing a natural, un-electronic sound signature that rivals more expensive Class A/B designs.
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Our Summary
Product Strengths
- Clean, neutral, and transparent sound signature that neither adds nor takes away from the source material, ensuring high fidelity music reproduction
- Excellent built-in DAC using dual Burr-Brown PCM1794A chips, comparable to some standalone DACs
- Well-implemented built-in MM phono stage, outperforming entry-level outboard phono stages and suitable for higher-end MM cartridges
- Gorgeous casework with customizable finish options, blending wood and metal for an elegant appearance
- High power output (200W into 8 ohms, 400W into 4 ohms) capable of driving a wide range of speakers with ease
- Single Shot only has single-ended RCA inputs, the Double Shot variant is needed for balanced inputs
Product Considerations
- The built-in phono stage lacks loading and gain options, potentially limiting compatibility with some moving coil cartridges
- The DAC section is USB input only and might not be as keen on very high sample rates (above 192kHz)
- Some reviewers would like to see a COAX digital input
- The lights on the front panel might be too bright for some listeners, even though there is a dimmer switch
Comparisons (according to reviewers)
- Vs Ayre 8-Series separates: Ayre provided a greater sense of dimensional fullness
- Vs Leben CS600: Leben coaxes more emotion, because it places more emphasis on tone color and body
Takeaway: The Java Hi-Fi Single Shot is a beautifully designed, all-in-one integrated amplifier that delivers a neutral and transparent sound, suitable for those who appreciate high-fidelity audio and want a streamlined system. Its versatility and excellent built-in components make it a worthwhile investment for a high-quality audio experience.
Video review
Our take on the brand
Java HiFi stands out for using GaN FET transistors in their Class D amplifiers and LDR (Light Dependent Resistor) technology in their preamp stage, with the latter controlling volume through varying light intensity for a purer audio path. Their amplifiers deliver high power with remarkably low distortion while challenging the typical limitations of Class D technology, producing a natural, un-electronic sound signature that rivals more expensive Class A/B designs.
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Integrated (Single)
Page
Product Page
EAR 890
6351
/
Released
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EAR Yoshino
Push-pull power amplifier using eight KT90 output valves (four per channel). 70 Watts per channel stereo (bridgeable to 140 watts mono) into 4, 8, or 16 ohms. Self-biasing design with Balanced or unbalanced input.
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.
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Our Summary
Product Strengths
- The EAR 890 produces 70Wpc in stereo, and can be bridged to 140W in monoblock
- Neutral sound that gets out of the way and lets the user enjoy the music
- Complex and dense music textures are handled with ease, and dynamically demanding passages are sailed through
- Articulate midrange
- Detailed and realistic bass
Product Considerations
- Removing/installing tube cages is difficult and time-consuming
- The loudspeaker binding posts are positioned too close to the output transformers, making it hard to tighten them properly
- Some assembly work appeared amateurish, specifically the use of silicone in various locations, such as fastening chassis wires
- The amplifier can operate quite hot
- May not have as much bass impact compared to solid state amps
Comparisons (according to reviewers)
- The EAR 890 monoblocks achieve SET-like definition along with the authority and swagger necessary for most full-size speaker systems, when compared to Cary Audio 300B SET amps
- The EAR 890 is as textured as the top LAMM designs, but with noticeably better neutrality and more power
- The EAR 890 surpassed the deHavilland KE50As with a more articulate midrange, producing more color and separation in the microtones of instruments
Takeaway: The EAR 890 is easy to set up and sounds good with very little tweaking, making it easy to just sit back, relax, and enjoy the music. It's a good choice for people who want a tube amp that is both musical and powerful for their home listening experience.
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.
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EAR 890
Page
Product Page
Halo A51
5749
/
Released
Parasound
The Parasound A51 is a high-powered five-channel amplifier designed to bring your home theater system to life. Delivering 250 watts per channel at 8 ohms, the A51 ensures powerful, clean, and dynamic sound across all five channels. This amplifier is THX Ultra2 certified, providing exceptional performance for even the most demanding speaker systems.
Parasound amplifiers are a favorite among hi-fi dealers because they offer a ton of power and performance without hitting crazy price levels. Designed by John Curl, their hifi and home theater amps are known for clean, neutral sound and an ability to power just about any system with ease. Sure, you can find better amps, but they come with serious diminishing returns. For a lot of people, Parasound hits that sweet spot where you feel like you’ve reached the endgame without spending a fortune.
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Our Summary
Product Strengths
- Delivers amazing quality of sound and detail
- Bulletproof amplification
- Has a rhythmically soulful sound with a tremendously rich and natural midrange
- The A51's bass is well-defined, extremely textured, and robust
- With 250 watts on tap, the Parasound A51 will power virtually anything
Product Considerations
- Due to its class A/AB design, the A51 does get a bit warm and should be installed in a properly ventilated space and/or rack
- The A51 is large and heavy, and is best moved and/or positioned by two people
Comparisons (according to reviewers)
- Compared to Rotel, the Rotel makes the M&K Sound system slightly bright with a bit of sibilance, while the Parasound is more neutral
- Compared to Acurus A250, the Parasound had tighter bass, which is probably attributed to a better damping factor
Takeaway: The Parasound Halo A51 is a high-performance amplifier with great sound quality, detail, and build quality, making it an excellent choice for audiophiles and home theater enthusiasts. Its ability to deliver power and control to speakers makes it a valuable addition to any high-end audio system.
Video review
Our take on the brand
Parasound amplifiers are a favorite among hi-fi dealers because they offer a ton of power and performance without hitting crazy price levels. Designed by John Curl, their hifi and home theater amps are known for clean, neutral sound and an ability to power just about any system with ease. Sure, you can find better amps, but they come with serious diminishing returns. For a lot of people, Parasound hits that sweet spot where you feel like you’ve reached the endgame without spending a fortune.
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Halo A51
Page
Product Page
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
Magazine reviewers and YouTubers have tried this product—so we've summarized their strongest opinions below.
Product Strengths
- Uses GaN (Gallium Nitride) MOSFET transistors for fast switching speed and high efficiency
- Compact size and low heat output compared to traditional amplifiers
- Offers 'tube rolling' capability by allowing users to swap out the GaN MOSFET power amplification unit within the glass tube
- Delivers a detailed and clear sound, with some reviewers noting a near-neutral presentation
- Impressive bass control, grip, and texture, especially considering its size
Product Considerations
- Some reviewers noted a lack of visceral weight in the low frequencies compared to higher-powered Class A/AB amplifiers
- One reviewer found brushes on jazz recordings to be irritating due to the amplifier's detailed and neutral presentation
- The aesthetic, while attractive to many, may confuse those strictly on either the tube or transistor fence
Comparisons (according to reviewers)
- Vs PS Audio BHK300: The Audion offered greater definition in the bass, while the BHK shook the room more with bass energy
- Vs Gryphon Essence: The Audion has a lighter disposition than the Gryphon, bringing a sense of openness with a sprinkling of sweetness
- Vs Merrill Audio Element 116: The Audion comes close to the sound quality of the Merrill Audio Element 116 monoblocks
- Vs AGD Vivace: The Audion achieves as much prominence in the bass as that larger amp did with its greater power supply
Takeaway: The AGD Audion is a compact and efficient amplifier that delivers high-quality sound with exceptional detail and control. Its unique design and 'tube rolling' capabilities offer a compelling option for audiophiles seeking a modern take on amplification.
How useful are hifi reviews? We consider them useful for three things: (1) Surfacing new products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've ever heard (this means they probably are legitimately great). (3) Identifying a product's unique attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we discount what reviewers say because they heap praise on everything—rarely being negative for fear of souring relationships with manufacturers. Further, they seldom have more than a couple products on-hand at once, relying on their imperfect memories to compare to past products.
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