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.
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.
Prestige Series
- Positioning: The entry-level lineup offering high-quality audio performance with accessible designs.
- Description: Delivers impressive sound quality through carefully engineered components. While it provides a solid foundation, it lacks the advanced technologies found in the higher-tier Reference and Signature Series, resulting in comparatively less refined audio reproduction.
Reference Series
- Positioning: Mid-tier products that introduce enhanced features and performance over the Prestige Series.
- Description: Incorporates improved circuit designs and higher-grade materials, offering a more detailed and dynamic listening experience. However, it doesn't include the proprietary Inverted Triode technology present in the Signature Series, which limits its ability to deliver the same level of sonic purity and realism.
Signature Series
- Positioning: High-end products featuring Aries Cerat's proprietary technologies for superior audio fidelity.
- Description: Stands out with the implementation of the unique Inverted Triode technology, providing exceptional linearity and low distortion. This results in a more natural and immersive sound compared to the Reference Series.
Limited Edition Series
- Positioning: The flagship lineup representing the highest level of craftsmanship and audio performance.
- Description: Features top-of-the-line components and exclusive designs, such as the dual-chassis configuration for improved isolation and power supply integrity. This meticulous engineering surpasses the capabilities of the Signature Series, delivering extraordinary soundstage and detail retrieval.
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Exsequor Reference
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Manufacturer's notes
The original Exsequor amplifier was one of our first ever commercial design, and one of our proudest moments. Now with the MKII version, the Exsequor monoblock power amplifier has finally got it's facelift. Being our top SOTA offering for 9 years, it was unsurpassed by whatever new design we came up, and only outperformed by our statement Achilleas amplifier. The Exsequor is an amazing and timeless musical server.
Working in Class A1, the Exsequor amplifier can deliver more than 65W in 8ohm or 4ohm loads. With it’s unsurpassed clarity, 3D imaging and breathtaking transients, with enough power to drive almost any floorstanding speaker, this SET amplifier is a class of it’s own. We believe that SE non feedback amplification stages deliver the best overall sonic performance to the listener. Yet, almost all SET amplifiers do not have sufficient power to drive the majority of modern loudspeakers. One way of delivering enough power from a SET amplifier, is the use of many parallel mainstream tubes like KT-88, EL34 or big bottle tubes like 845 and the 805. Direct heated triodes with their super smooth sound are the way to go.
Manufacturer Specs
- Output Power: 65W (A1)
- Gain: x3 (9.5db)
- Noise floor: <100db (Ref) unweighted
- Tube list: 2 x 813, 1 x 814 (per channel)
- Distortion: -75db H2 @ 1W -55db H2 @10W
- Signal bandwidth: 8Hz-110KHz @80% max power
- Energy storage: 3000j
- Power supply: 1,800VA power transformer
- Inputs: RCA, AC link proprietary input
- Output impedance: User selectable (impedance matching system) 1.6ohm (8ohm setting), 0.8ohm (4ohm), 0.4ohm (2ohm setting)
- Power Consumption (idle): 520W per channel
- Dimensions: 610mm W x 590mm D x 525mm H (2 chassis stacked)
- Weight: 170kg per channel
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Average Price
$100,001+
Used Products
3
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Brand Popularity
257
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Badges
Top 50 Brand
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Products
29
Founded
2010
Our take on the brand
Aries Cerat is a hifi brand known for its use of oversized components and TriodeFet technology, which combines tube and solid-state designs to create a distinctive sound signature. Their products, including the Kassandra DAC and Symphonia horn speakers, are built with massive power handling capabilities and carefully selected drivers to deliver a muscular, dynamic sound that rivals top analogue systems.
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Aries Cerat
What if you spend a bit more?
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What else competes at this price?
Relentless 800
195500
/
Released
2023
Dan D'Agostino
After setting the measure for amplifier excellence, the new Relentless 800 Mono Amplifier extends the Relentless sound quality to a smaller platform. Every major section of the Relentless circuitry - power supply, input, driver, and output stages - have all been enhanced and these all feature in the new Relentless 800. The Relentless 800 incorporates the same circuit platform as its bigger brother with a lower power output. Mind you, the Relentless 800 is virtually unlimited when it comes to power delivery and is only outdone by the Relentless 1600 itself. Nuanced and musical at low volume levels, the Relentless 800 delivers the striking dynamic contrasts – that brings music to life.
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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Our Summary
Product Strengths
- Exceptional sound quality right away that continues to improve
- Capable of uncompressed dynamics at both loud and soft volumes, micro and macro, and doesn't harden or distort when playing loud
- Can handle big scale, orchestral, beautiful music to really raw, crazy metal music, all played convincingly at loud and soft levels
- New details are revealed without being hyper-analytical, sterile, or harsh
- Built like military materiel
Product Considerations
- Each monoblock weighs 145kg, so owners will welcome assistance when receiving it
- Inputs are on balanced XLR only, while the solid copper speaker terminals are designed for spade lugs, not 4mm bananas
- The Breguet watch dial-inspired meter's 'time-keeping' is less accurate
Takeaway: The D'Agostino Relentless 800 reproduces a wide range of music genres with detail and dynamics, offering an immersive and enjoyable listening experience. It brings out the best in music.
Video review
Our take on the brand
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.
Visit
Relentless 800
Page
Product Page
Eric Encore
174965
/
Released
2021
Engstrom
Named after a great Swedish choir conductor, ERIC is our no-compromise statement power amplifier. Fully balanced and transformer-coupled, it was created to drive even the toughest loads. ERIC uses separate power supplies for input and output stages and DC filaments.
Engström is a Swedish hifi brand that handcrafts amplifiers with a minimalist Nordic design, featuring fully balanced, transformer-coupled circuits and no negative feedback to preserve natural sound dynamics. Their amplifiers, which use KR Audio's T-100 power tubes, are known for creating an expansive, three-dimensional soundstage with what audiophiles call a "Scandinavian Sound"—characterized by open, detailed, and natural sonic qualities.
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Our Summary
Product Strengths
- Crisp, tight rhythms are allied to a sonorous, close-focused view of vocals
- Capable of bags of detail and definition, while bathed in a lovely warmth
- Massive bass weight is available, with fabulous rosiny bite to the low strings, silky violins, and the feeling of space and air around the performers
- Big, substantial sound makes the most of remasters, bringing out all the character of vocals
- Focus and warmth contributes to a solid, three-dimensional soundstage, and remains clean and tight when cranked
Product Considerations
- The precious bottles should never be left unattended or used without the purpose-designed glass hood installed
- The amps' thermal characteristics may be a problem in a globally-warmed English summer
- Each amp draws 430W from the wall
Comparisons (according to reviewers)
- Vs Dan D'Agostino Relentless Monoblocks—the ERIC Encores are more expensive per watt
Takeaway: The Engström ERIC Encore Mono Power Amplifiers offer a captivating and enthralling presentation that challenges old clichés about valve amps. One should hear them if given the chance, for they sound glorious.
Video review
Our take on the brand
Engström is a Swedish hifi brand that handcrafts amplifiers with a minimalist Nordic design, featuring fully balanced, transformer-coupled circuits and no negative feedback to preserve natural sound dynamics. Their amplifiers, which use KR Audio's T-100 power tubes, are known for creating an expansive, three-dimensional soundstage with what audiophiles call a "Scandinavian Sound"—characterized by open, detailed, and natural sonic qualities.
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Eric Encore
Page
Product Page
KMA i800
139995
/
Released
2023
Krell
The Krell KMA i800 represents the pinnacle of monoblock amplifier design, delivering extraordinary power and precision for the most demanding audio enthusiasts. As a flagship model in Krell's lineup, the KMA i800 is engineered to drive even the most challenging speaker loads with effortless authority, revealing every detail of your music with stunning clarity and depth. Whether you're listening to a delicate piano solo or a full orchestral crescendo, the KMA i800 delivers a sonic experience that is both powerful and profoundly immersive.
Krell is a hifi brand whose amplifiers use iBias technology to operate in Class A up to full power without excessive heat, while maintaining the ability to double power output as speaker impedance halves. Their amplifiers feature XD technology for better control over speaker drivers, and modern models like the K-300i include Bluetooth, HDMI, and streaming features for contemporary audio setups.
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Our Summary
Product Strengths
- Delivers 800W of class-A power regardless of the speaker load
- Features XD technology that lowers output impedance, resulting in more control over the speaker drivers and improved soundstage depth
- Employs Sym-Max technology to significantly reduce second-order harmonic distortion, bringing out more detail and improving the sense of timing and pacing
- Has a power supply consisting of 5400VA of transformers and 188,000µF of filter capacitance for substantial power delivery
- Offers protection against excess direct current, short circuits, and voltage sags—brown outs
Product Considerations
- It may be too much power for some users
- High idle heat dissipation at 890 btu/hr per channel
Takeaway: The Krell KMA-i800 is a powerful amplifier with technologies that aim to provide a clean and controlled sound. Its high power output helps to improve sound quality even at average listening levels.
Video review
Our take on the brand
Krell is a hifi brand whose amplifiers use iBias technology to operate in Class A up to full power without excessive heat, while maintaining the ability to double power output as speaker impedance halves. Their amplifiers feature XD technology for better control over speaker drivers, and modern models like the K-300i include Bluetooth, HDMI, and streaming features for contemporary audio setups.
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KMA i800
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Product Page
Telos 4800
260000
/
Released
2024
Goldmund
Telos 4800 is a revolutionary addition to Goldmund's illustrious collection encapsulates the technical brilliance of the Telos 8800 within a more compact form, setting a new pinnacle in high-fidelity audio for discerning audiophiles who seek supreme sound quality and precision. Meticulously crafted with Goldmund's legendary attention to detail and harnessing the latest advancements in audio technology, the Telos 4800 redefines audio performance standards.
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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Our Summary
Product Strengths
- Designed to drive even very low-impedance loudspeakers without compromising distortion levels
- Delivers unmatched sound clarity and power with a maximum power output of 1050 watts RMS at 8 ohms and a total harmonic distortion (THD) of only 0.005% across 20 Hz to 20 kHz
- Features a damping factor of 600 at 1 kHz and output floor noise of less than 3 μV, delivering an impeccably clean and detailed sound free from unwanted background noise
- Ensures maximum thermal security and short-circuit protection with fully analog circuitry from input to output and an automatic shutdown feature
- Equipped with analog and digital inputs, including RCA and XLR connectors
Product Considerations
- A preamp is required to supply input switching and any processing needed before sending signals to the Telos 4800 to power the speakers
- As a mono power amp, two units are required for a stereo setup, increasing the overall cost significantly
Takeaway: The Telos 4800 is designed to meet the needs of any audio system and delivers unmatched sound clarity and power. With impeccable specs, it offers a high-end performance for audiophiles.
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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Telos 4800
Page
Product Page
Jubilee Mono Ultimate
135000
/
Released
2023
Octave
The Jubilee Mono Ultimate - the next generation. It has the most sophisticated and uncompromising amplifier design in our amplifier hierarchy and sets a new benchmark for state-of-the-art power amplifiers. It features a number of detailed improvements including the use of eight KT 170 tubes with 440 W per channel. The basic idea of the Ultimate series is the extreme expansion of the power bandwidth and the bass range with our highly specialized (newly developed) and oversized high performance output transformer.
Octave is a hifi brand specializing in tube amplifiers that use enhanced pentode configurations to ensure stability with difficult speaker loads down to 2 ohms, while their Super Black Box technology increases power supply capacitance for better dynamics
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Video review
Our take on the brand
Octave is a hifi brand specializing in tube amplifiers that use enhanced pentode configurations to ensure stability with difficult speaker loads down to 2 ohms, while their Super Black Box technology increases power supply capacitance for better dynamics
Visit
Jubilee Mono Ultimate
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.
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
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