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
- Combines a smooth, un-solid-state sound with loads of power and dynamics
- Has a practical and versatile design suitable for different placements
- Delivers a warm and involving sound
- Is a reviewer's 'favorite Krell ever' in part due to its relatively lighter weight—60 pounds—compared to older models
- Can be accessed via a web page that shows current operating temperature, fan speed, and overload conditions when wired to an Ethernet network
Product Considerations
- The top end is smooth and not very detailed, which may not appeal to audiophiles seeking highly detailed treble
- Despite iBias technology, the unit generates some wasted heat, indicated by the presence of cooling fans
- Some Krell enthusiasts may not like the lighter weight compared to older, heavier Krell amplifiers
Comparisons (according to reviewers)
- Vs Classé Audio CA-2300: The Solo 375 has better spaciousness, but the CA-2300 has more detailed and delicate treble
- Vs Pass Labs X350.5: The Solo 375 has smoother treble than the X350.5, but the X350.5 has greater spaciousness
Takeaway: The Solo 375 is a powerful amplifier that has a warm, smooth sound. It is versatile enough to be used in different setups, so it's a great choice for audiophiles.
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
Solo 375 XD
reviews
[{"title":"Krell Solo 375 Mono-Block Amplifier Reviewed - HomeTheaterReview","link":"https://hometheaterreview.com/krell-solo-375-mono-block-amplifier-reviewed","source":"Home Theater Review","datePublished":"2015"}]
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: 375 watts RMS at 8 ohms, 600 watts RMS at 4 ohms
- Frequency Response: 20 Hz to 20 kHz +0, -0.15 dB; <0.5 Hz to 100 kHz +0, -3 dB
- Total Harmonic Distortion: <0.03% at 1 kHz, at 375 W, 8 Ω; <0.19% at 20 kHz, at 375 W, 8 Ω
- Signal-to-Noise Ratio: >103 dB, wideband, unweighted; >114 dB, "A"-weighted
- Gain: 27 dB
- Input Sensitivity: 2.45 V RMS
- Input Impedance: Single-ended: 100 kΩ; Balanced: 200 kΩ
- Output Voltage: 154 V peak-to-peak; 55 V RMS
- Output Current: 17 A peak
- Slew Rate: 40 V/μs
- Output Impedance: <0.018Ω, 20 Hz to 20 kHz
- Damping Factor: >440, 20 Hz to 20 kHz, referred to 8 ohms
- Power Consumption: Standby: 1 W; Idle: 66 W; Maximum: 1150 W
- Heat Output: Standby: 3.42 BTU/hr; Idle: 225 BTU/hr; Maximum: 3933 BTU/hr
- Inputs: 1 single-ended via RCA connector, 1 balanced via XLR connector, 1 CAST
- Outputs: 1 pair of binding posts
- Dimensions: 17.1 in. W x 7.65 in. H x 21.10 in. D (434 mm W x 194 mm H x 536 mm D)
- Weight: 70 lbs (31.8 kg) shipping; 60 lbs (27.3 kg) unit only
Description
The Krell Industries Solo 375 XD and Solo 575 XD Mono Amplifiers are designed for audiophiles seeking unparalleled power and precision. Featuring Krell's innovative iBias™ Technology, these amplifiers ensure superior sound quality with enhanced efficiency. Both models provide exceptional performance, making them ideal for high-end audio systems.
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:
- The iBias technology allows Krell amplifiers to operate in Class A, delivering its sonic benefits, without the typical heat and power consumption drawbacks, making it suitable for modern lifestyles and versatile placement.
- Krell products often incorporate fully balanced, fully complementary circuits throughout the entire audio path, reducing noise and improving the slew rate for faster transient response.
- The power supply is robustly designed, allowing for consistent doubling of power as impedance halves down to very low ohm loads, ensuring excellent speaker control across a wide range of speaker types.
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Select product comparisons
K-300i Integrated
- Positioning: Positioned as an all-in-one solution for modern audiophiles, combining amplification and digital streaming capabilities.
- Description: Delivers 150 watts per channel with advanced digital streaming capabilities, making it ideal for those who want a compact yet powerful system. Unlike the Duo XD series, which focuses on pure amplification, it offers built-in streaming services like Tidal and Spotify, making it perfect for users who prioritize convenience and digital integration. Its HDMI 2.0 inputs with 4K UHD passthrough also set it apart from the Solo XD series, catering to users with home theater setups.
Duo XD
- Positioning: Designed for high-end stereo amplification, offering models with varying power outputs to suit different needs.
- Description: Features Krell's iBias technology to deliver Class A sound quality with greater efficiency, making them suitable for audiophiles seeking high fidelity without excessive heat. Compared to the K-300i, the series focuses solely on amplification, providing more power and control for larger setups. Its advanced cooling system and protection circuitry make it more robust than the K-300i.
Solo XD
- Positioning: Krell's line of mono amplifiers, offering high power and precision for dedicated audio channels.
- Description: With high power output and Krell's CAST technology, provides excellent sound quality and system integration. Unlike the Duo XD, which is stereo-focused, the mono design allows for more precise channel separation and power delivery. Its ability to deliver 575 watts into 8 ohms makes it more powerful than the Duo XD.
KSA-i400
- Positioning: Krell's flagship stereo amplifier, offering the highest power and performance in their lineup.
- Description: The groundbreaking KSA-i400's 400 watts per channel and advanced iBias technology make it the pinnacle of Krell's amplification offerings, providing exceptional power and clarity. Compared to the Solo XD, it offers stereo amplification with even greater power. Its robust build and high-current power supply ensure it can drive any speaker with ease, setting it apart from the more integrated-focused K-300i.
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Avg. Product Price
$10,001-$20,000
Used For Sale
177
Available (Scroll Down)
Brand Popularity
46
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
12
Founding Year
1980
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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Krell
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What if you spend more?
McIntosh
MC3500 Mk II
30000
30000
/
4
Reviews
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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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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Dan D'Agostino
Progression S350
27250
27250
/
3
Reviews
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.
Every amplifier employs a voltage rail, actually two, a positive one and its companion negative partner. Voltage rails support the delivery of power to the speaker. The music signal swings between these two rails but due to natural loss, the musical signal never reaches the output rails' full capability.
Our Super Rail overcomes this limitation. Borrowing the idea of a turbo in a car engine, the Super Rail employs higher voltage rails in the sections prior to the output stage. This voltage "boost" allows the musical signal to exploit the full capability of the output voltage rails.
Extending the musical signal swing closer to the output rails maximizes the performance of the output circuitry design itself. The result is improved dynamics, lower distortion, and a fierce grip of the speaker.
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
- 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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Musical Fidelity
Nu-Vista PAS
28399
28399
/
1
Reviews
The Nu-Vista PAS features the tried and tested Nu-Vista stage featuring 6S51N nuvistors in a discrete class A amplifier buffer. This is followed by a balanced configuration circuit and balanced input high power, low distortion output amplifier stage. The power stage has 5 pairs of high power thermally compensated output devices for reliable and stable operation. Based on Titan 1000W stage, it has separate capacitors for bulk supply, and one each for output devices con siderably reducing output impedance and improving dynamics. Chokes are added for further improved supply ripple and pulse current spike reduction Bias is set for over 5W of initial class A operation thereafter the stage slides into class B operation at a point where the now much lower discontinuity is easier dealt with than “standard” crossover distortion.
Musical Fidelity is known for its unique amplifier designs, particularly the A1 integrated amplifier that uses its top plate as a heatsink and features a distinctive current-mode phono stage. The brand stands out for its innovative dual-monoblock approach in integrated amplifiers, where separate power transformers and dedicated power supplies are housed in a single chassis, as seen in their M8xi and M6i models that deliver exceptional power output.
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Product Strengths
- Exceptionally well built, luxuriously finished with a thick-panelled milled aluminum chassis and first-rate metalwork quality
- Offers satisfying dynamic overtness and excellent transparency to the signal
- Provides exceptional detail retrieval and reveals amazing venue ambience and reverberance
- Offers a solidity and tight punch in the low-end, without artificial bloom or smearing of bass notes
- Features a two-chassis architecture, providing total quietness of the circuit
Product Considerations
- The diameter of each speaker connector's central post is too large, banana plugs are the only practical and safe way to connect speakers
- Stay away from brash metal tweeters and bad recordings, the Nu-Vista PAS will expose their failures
- The Musical Fidelity may not sound quite as fluid, but it's a more direct presentation, a more present—explicit sonic signature that provides exceptional detail retrieval compared to the Gryphon Audio Antileon EVO reference amplifier
Comparisons (according to reviewers)
- The Musical Fidelity may not sound quite as fluid, but it's a more direct presentation, a more present—explicit sonic signature
Takeaway: The Nu-Vista PAS amplifier is a well-built and powerful amplifier that delivers detailed and dynamic sound. Its robust design and revealing nature make it a great choice for audiophiles seeking a high-performance amplifier.
Video review
Our take on the brand
Musical Fidelity is known for its unique amplifier designs, particularly the A1 integrated amplifier that uses its top plate as a heatsink and features a distinctive current-mode phono stage. The brand stands out for its innovative dual-monoblock approach in integrated amplifiers, where separate power transformers and dedicated power supplies are housed in a single chassis, as seen in their M8xi and M6i models that deliver exceptional power output.
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Gryphon
Diablo 333
24900
24900
/
9
Reviews
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.
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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Our summary
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.
Video review
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 competes at this price?
Krell
Solo 575 XD
14300
/
Released
The Krell Industries Solo 375 XD and Solo 575 XD Mono Amplifiers are designed for audiophiles seeking unparalleled power and precision. Featuring Krell's innovative iBias™ Technology, these amplifiers ensure superior sound quality with enhanced efficiency. Both models provide exceptional performance, making them ideal for high-end audio systems.
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
- Superior grip on woofers
- Muscular, well-textured bottom end
- Unusually powerful for a class-A amp, outputting a claimed 575W RMS into 8 ohms or 900W into 4 ohms, yet weighing only 70 lbs and having no external heatsinks
- Weight and power were undeniable
- Transient slam and grip on the Wilson Audio woofers took it to another level of excitement
Product Considerations
- Aesthetic design uses a thin, U-shaped cover which is more common for home-theater receivers and processors, suggesting it saves on cost compared to milled-aluminum cases
- LCD screen has a somewhat dated look
- Initial impressions were negative, sounding 'broken: glazed and spatially flat, with weak bass,'—but this was resolved
Comparisons (according to reviewers)
- Vs darTZeel NHB-458 monoblocks, the Solo 575 exerted a superior grip on the woofers of the reviewer's Wilson Audio Specialties Alexandria XLF speakers
- Vs Bel Canto Design's Black amplification system, the Krells had a bottom-end whomp that reminded the reviewer of the Bel Canto system
Takeaway: The Krell Solo 575 is a powerful amplifier that delivers impressive bass control and a muscular sound. It could be a great choice for audiophiles looking for a class-A amp with high power output without the need for massive heatsinks.
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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Hegel
H600
12500
/
Released
2023
H600 is our reference integrated amplifier. With its 303 watts in 8 ohms, a damping factor of 4000, and 2 ohms drive capability, this powerhouse of an amplifier can drive any speaker with confidence and ease. The amplifier is a dual mono design, bringing it as close as possible to the performance of two mono amps in a single box. It also boasts a state-of-the-art preamplifier with the extremely precise volume attenuator found in our reference P30A amplifier.
Known for producing all-in-one integrated amplifiers, Hegel has become a favorite among hi-fi enthusiasts and dealers worldwide. Their amplifiers are particularly praised for their exceptional bass control, attributed to their high damping factor, which ensures precise management of even difficult-to-drive speakers like planar magnetics and dipoles. With competitive pricing and high performance, Hegel integrateds stand out as some of the best options available for audiophiles seeking simplicity and excellence in a single component.
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Our Summary
Product Strengths
- Dual-mono design delivers 303W per channel into 8 ohms, providing power and control for any speaker
- High damping factor of over 4000 ensures absolute control over speaker drivers, resulting in pristine sound reproduction
- New DAC implementation based on ESS Sabre 9038Q2M chip offers pure audio fidelity without any resampling or upsampling
- Supports streaming via Apple AirPlay 2, Spotify Connect, Tidal Connect, and UPnP/DLNA
Product Considerations
- Does not have a phonostage
- Lacks an HDMI jack with ARC
- The supplied RC10 remote is slender with tiny buttons
- Weighs 22kg
- Minimalist design may be a bit bland for some
Comparisons (according to reviewers)
- Vs Bryston B135 SST 2, the H600 delivers more effortless presentation at high output
- Vs McIntosh MA9500, the H600 has bigger sound, is crisper and has higher resolution
Takeaway: The H600 is a versatile and powerful integrated amplifier that excels in delivering high-quality audio from both digital and analog sources. Its robust amplification makes it a great choice for audiophiles seeking a simplified yet high-end audio solution.
Video review
Our take on the brand
Known for producing all-in-one integrated amplifiers, Hegel has become a favorite among hi-fi enthusiasts and dealers worldwide. Their amplifiers are particularly praised for their exceptional bass control, attributed to their high damping factor, which ensures precise management of even difficult-to-drive speakers like planar magnetics and dipoles. With competitive pricing and high performance, Hegel integrateds stand out as some of the best options available for audiophiles seeking simplicity and excellence in a single component.
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Chord Electronics
Ultima
15375
/
Released
2023
The ULTIMA mono power amplifiers have been conceived for the very finest high-end audio systems, those which by their very nature, tend to have the most demanding and most difficult-to-drive large loudspeakers. They deliver unsurpassed power and are capable of effortlessly driving any speaker.
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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AGD
Duet
11500
/
Released
2024
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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ASR
Emitter II
18750
/
Released
The Emitter II models are considered by true music connoisseurs and uncompromising audiophiles as the ultimate in amplifier construction. Through word of mouth alone, a music-addicted and steadily growing global fanbase has developed, who have realized their desire for a concert hall in their home environment. Powered by two separate power supplies, the most demanding speakers and elaborately built dynamic transducers are driven to peak sonic performance.
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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