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.
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.
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AMP II Electra
reviews
Video Review
Manufacturer details
Features
Specifications
- Output Power: 6W
- Input Sensitivity: 2V
- Input Impedance: 47K or 100K Ohms
- Output Impedance: 4 & 8 Ohms
- Max Power Consumption: 200W
- Output Noise, Unweighted: < 0.5 mVrms
- Dimensions (without tubes and feet): 250mm (H) x 440mm (W) x 400mm (D)
- Weight: 21kg
Description
AMP II is a Pure Class A, Single Ended Amplifier. It is essentially a 2 gain stage Power Amplifier coupled with a High Quality Pre-amplifier. It therefore is not only extremely transparent but also very musical and powerful sounding Intergated Amplifier. The Triode Connected 6V6G Power Valves offer the same level of scale and holography as the Directly Heated Triodes without being DHT.
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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:
- SW1X uses classic circuit designs, often inspired by Kondo and Audio Note UK, reimagined with modern enhancements and a focus on harmonically matched components.
- A key element is the use of non-oversampling (NOS) DACs and a lack of digital filters, aiming to eliminate digital artifacts and achieve a more analog-like sound reproduction.
- SW1X offers a wide range of models and versions within each product line, allowing customers to tailor the sound to their specific tastes and system synergy through component and material choices, such as copper or silver wiring and different capacitor types.
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SW1X DAC I Special 2
- Positioning: Entry-level line, designed for affordability and compactness.
- Description: Offers a pure NOS R2R design, providing a musical and organic sound that is rare in its price range. It features a simple yet effective valve amplification topology. Compared to higher models like the DAC II, it lacks the more advanced power supply and output stage configurations, making it suitable for smaller setups and those with a limited budget.
SW1X DAC II Balanced Special
- Positioning: Mid-range model with enhanced features for balanced audio output.
- Description: Combines the digital side of the DAC II with the power tube output stage of the DAC IV, offering a dynamic and engaging sound. It features a balanced signal output transformer and active I/V conversion, providing a more refined audio experience than the DAC I.
SW1X DAC III VSB
- Positioning: Mid to high-end model with USB connectivity for versatile use.
- Description: Integrates a USB interface, making it versatile for modern digital setups. It offers a pure NOS design with a valve output stage, providing a rich and detailed sound. Compared to the DAC II, it includes larger power supplies and a more robust output stage.
SW1X DAC IV
- Positioning: High-end model with advanced power supply and output stage.
- Description: Features directly heated diodes and a power valve output stage, offering a mature and large-scale sonic presentation. It surpasses the DAC III in dynamic range and musical refinement.
SW1X DAC X
- Positioning: Flagship model, representing the pinnacle of SW1X engineering.
- Description: The ultimate endgame DAC, combining technologies from the entire SW1X lineup into one chassis. It features a non-oversampling R2R design with a directly heated power triode valve output stage, delivering a musical and natural sound.
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Avg. Product Price
$10,001-$20,000
Used For Sale
5
Available (Scroll Down)
Brand Popularity
302
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
46
Founding Year
Our take on the brand
SW1X Audio Design creates DACs that use a non-oversampling approach and vintage TDA1541 chips with tube output stages, avoiding digital filtering to maintain a more natural, analog-like sound. Their products feature separate power supply chassis designs and harmonically matched vintage components, including directly heated triode tubes and AB resistors, which are carefully selected for their distinctive sonic qualities.
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Used
SW1X
All of the Brand's Used Products
What if you spend more?
SW1X
AMP V Titan
22295
22295
/
1
Reviews
SW1X Audio Design creates DACs that use a non-oversampling approach and vintage TDA1541 chips with tube output stages, avoiding digital filtering to maintain a more natural, analog-like sound. Their products feature separate power supply chassis designs and harmonically matched vintage components, including directly heated triode tubes and AB resistors, which are carefully selected for their distinctive sonic qualities.
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Product Strengths
- Alluring and sophisticated midrange with a tonal and textural directness
- Class-leading differentiation of dynamics and tonalities between instruments
- Engineering feat so thorough in forging a signal path of the purest as to be fanatical
- Brings a whole new level of sophistication to the art of music reproduction
- Exerts complete control of speakers with high sensitivity
Product Considerations
- The RCA jacks are closely spaced, necessitating the use of thin interconnects
- Eight watts may not be enough for speakers with lower sensitivity in larger rooms, potentially leading to dynamic compression and distortion
- Low output limits the range of suitable speakers compared to solid-state amplifiers
Takeaway: The SW1X AMP V 'Titan' Special is a handcrafted, ultra hifi amplifier from the United Kingdom, offering definitive performance, beauty of sound, and functional options. It stands apart in the field of the most exalted directly-heated triode amplifications, especially when paired with high-efficiency speakers.
Video review
Our take on the brand
SW1X Audio Design creates DACs that use a non-oversampling approach and vintage TDA1541 chips with tube output stages, avoiding digital filtering to maintain a more natural, analog-like sound. Their products feature separate power supply chassis designs and harmonically matched vintage components, including directly heated triode tubes and AB resistors, which are carefully selected for their distinctive sonic qualities.
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Trafomatic
Rhapsody
24122
24122
/
4
Reviews
Rhapsody is the pinnacle of our decades of experience in developing State of the art valve amplifiers. The name itself is the expression of our devotion to the Music and the Art. By definition it implicates the profound roots and legacy to the ancient Greek Art of the rhapsodists in performing Epics, to the most modern compositions, where the one-movement work structure of highly contrasted moods, colours and tonality, is expansive and yet unified in structure. The 300B valves are a piece of great audio history that are represented in the Rhapsody in the best and most refined way. The naturalness, the drive, their tonality and rich colour pallets are unmistakable. All of those virtues are combined and moved a step further by Trafomatic dedication into the deep understanding of the cyrcuit. The result is a endlessness adventure in discovering undisclosed hidden places in your favorite recordings.
Trafomatic Audio is unique for crafting its own transformers in-house, which gives them complete control over their amplifiers' sound quality. The brand stands out for using uncommon materials like Panzerholz (hyper-compressed plywood) for resonance control and rare tube types like the Elmac 250TL direct heated triode power tube in their designs.
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Product Strengths
- Delivers a 'silky sheen' characteristic of SET designs, which helps to prevent listener fatigue
- Offers a 'room-filling, full-blown' sound, especially with orchestral music
- The Trafomatic Audio Rhapsody presents an 'expressive' and 'real' dynamic range, creating a live musical experience
- Has an innate sense of melody that draws you into the musical mix, and an over-arching sense of sonic accuracy
- Features auto-biasing and toggles for 'Mesh' and 'Solid' 300B tubes, for enthusiasts who wish to try different valves
Product Considerations
- Limited wattage may restrict loudspeaker choices, requiring pairing with high-sensitivity models
- Bass frequencies exhibit higher distortion at lower power outputs
- The amplifier's modest S/N ratio suggests some mild background hiss may be audible
- Bright red chassis is a fixed color scheme, which may not appeal to everyone
- Reviews of the Rhapsody should be judged as very specific amplifier/speaker combos
Takeaway: The Trafomatic Rhapsody is a class act that draws attention to itself purely through its vivid and real sound. It plays music in such a way that one might never want to listen to anything else.
Video review
Our take on the brand
Trafomatic Audio is unique for crafting its own transformers in-house, which gives them complete control over their amplifiers' sound quality. The brand stands out for using uncommon materials like Panzerholz (hyper-compressed plywood) for resonance control and rare tube types like the Elmac 250TL direct heated triode power tube in their designs.
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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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Burmester
032
25000
25000
/
6
Reviews
The 032 Integrated Amplifier offers a wide variety of connectivity that far exceeds the normal range of integrated amplifiers. A PRE OUT output, for example, allows the connection of a separate power amplifier or the central volume control of different listening zones within a multi-room application. With its mighty 650 VA power supply the 032 Integrated Amplifier effortlessly delivers continuous high current in order to perfectly control even large speakers with low impedance and complex loads. Excellent special resolution and musicality are the hallmarks of the 032.
Burmester, a high-end audio brand renowned for its German craftsmanship, designs and handcrafts its components in Berlin. Known for its distinctive industrial aesthetic with chrome finishes, the brand supplies premium sound systems for Porsche and Mercedes-Benz.
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Product Strengths
- Music is delivered without perturbation, showcasing a 'grip' on the music
- A beautiful sonic palette is present, with a warm, detailed bass and very smooth, detailed highs
- Understated approach to music replay is pure and precise, without coarseness or grain
- Fabulously well made, with impressive build and finish
- Volume control has a hefty, well-damped but very precise feel to it, and the amplifier's on-board software is quick to respond
Product Considerations
- The headphone output is hidden on the rear panel, making it inconvenient to connect
- Large and heavy (around 40kg), requiring sturdy equipment support and assistance when unpacking
- The combination of heatsinks all-round and reflective chrome front panel may not be to all tastes
- Highly transparent sources and speakers are required to get the best performance
Takeaway: The Burmester 032 integrated amplifier sounds exceptional with refined sound and impressive insight. If the system is talented, this amplifier could be a great match.
Video review
Our take on the brand
Burmester, a high-end audio brand renowned for its German craftsmanship, designs and handcrafts its components in Berlin. Known for its distinctive industrial aesthetic with chrome finishes, the brand supplies premium sound systems for Porsche and Mercedes-Benz.
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What competes at this price?
Western Electric
91E
14999
/
Released
2022
Experience the 91E, a powerful classic from the makers of the original 300B. Double the performance, trouble-free, noise-free, and double the power of traditional 300B amps, made possible by patented circuit design.
Western Electric, one of the original developers of the 300B vacuum tube since 1938, stands out for their 91E Integrated Amplifier that delivers 20 watts per channel through their patented Steered Constant Current Source technology—significantly more power than typical single-ended triode amplifiers using 300B tubes. The brand's revival and continued production of the 300B tube have earned praise in the audiophile community, with their approach focusing on preserving classic tube sound while adding modern technological improvements.
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Our Summary
Product Strengths
- New patented design SCS (source current steering) allows the amplifier to have a fabulous bottom end without affecting the glorious midrange
- Proprietary noise reduction system eliminates noise that can be inherent in a single-ended design
- Circuit protects the 300Bs and keeps them in their safe operating range, so there is no chance of damaging the tube or having a shortened life
- More power from this amp than a traditional 300B, it's the difference in presentation
- It has Bluetooth, phono stage (moving coil and moving magnet), and wireless remote control
Product Considerations
- Instructions could be a little clearer about installing the 300Bs
- More warm-up is needed for each listening session than originally allowed
- The 91E was designed for operation with Western Electric manufactured 300B electron tubes
- The brands and specifications of the capacitors, resistors, transformers, internal wires, RCA jacks, switches, and binding posts are not disclosed
Comparisons (according to reviewers)
- Vs WE 91A: 91E retains what's best about the early WE 91A—its delicacy, bloom, openness, and tonal magic—and adds modern improvements
Takeaway: The Western Electric 91E is a uniquely designed amplifier providing great sound with modern features like Bluetooth and remote control, pushing what a 300B tube amplifier can achieve. It's a great option for audiophiles wanting to step up from other tube amplifier sounds.
Video review
Our take on the brand
Western Electric, one of the original developers of the 300B vacuum tube since 1938, stands out for their 91E Integrated Amplifier that delivers 20 watts per channel through their patented Steered Constant Current Source technology—significantly more power than typical single-ended triode amplifiers using 300B tubes. The brand's revival and continued production of the 300B tube have earned praise in the audiophile community, with their approach focusing on preserving classic tube sound while adding modern technological improvements.
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ampsandsound
Nautilus
11000
/
Released
The Nautilus is one of our flagship Personal Audio Tubed Integrated Amplifier. The Nautilus Rev 2 includes 2023 tube cage. This change to the metal work allows us to delineate inclusion of the Gen 5 power supply and culmination of 2 years successive efforts to improve this amazing amplifier.
ampandsound specializes in high-end, handcrafted tube amplifiers made in the USA. Their low-wattage amps pair perfectly with high-efficiency speakers and headphones. The company is known for classic, minimalist designs and a focus on delivering natural sound.
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Our Summary
Product Strengths
- Five individualized outputs with different impedances
- Custom wound ultra-high quality output transformers provide excellent frequency extension and a flat response
- Engaging audio components offer superior sound quality using proven theories, solid engineering, and quality manufacturing, all taking place in the USA
- Brings out the very best qualities in all of the headphones tested, providing the best presentation ever heard from the Aeolus
- Build quality is a step-up from other amplifiers
Product Considerations
- The most expensive quarter inch plugs you can get, have locks on them, which can be annoying
- Unplug headphones before switching to speaker outputs
- Weighs around 68 pounds and around 93 pounds shipped in its large pelican style case—it is heavy
- Can clip when used with speakers if pushed too hard
Comparisons (according to reviewers)
- Nautilus sounds better than the ZMF Pendant Headphone Tube Amplifier and the Mogwai OG Tube Amplifier in every regard
- Nautilus is even more comprehensive and expressive through the powerful, well-controlled, tonal density that is detailed and rich in nuance—it has more extension and top-notch resolution
Takeaway: The Nautilus seems to be a versatile amplifier that brings out the best in headphones and speakers. It's built with quality parts and offers a lush and detailed sound experience for audiophiles who want to enjoy music to the fullest.
Video review
Our take on the brand
ampandsound specializes in high-end, handcrafted tube amplifiers made in the USA. Their low-wattage amps pair perfectly with high-efficiency speakers and headphones. The company is known for classic, minimalist designs and a focus on delivering natural sound.
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Jadis
I300
16900
/
Released
2022
In the world of audiophiles, there is purist group militating for simplicity in tube amplification systems focusing on the use of the tube designed in the early days of tube technology: the directly heated triodes of which the most famous is the 300B. I300 is built around a simple 300B push-pull without feedback which offers unequalled musiciality of this tube.
Jadis Electronics is renowned for their meticulous handcrafting of tube amplifiers, with a unique process of hand-winding output transformers that's integral to their signature sound. Their tube amplifiers deliver unusually high power outputs without distortion even at maximum levels, setting them apart in the tube amplifier market.
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Our Summary
Product Strengths
- Wonderful mid-band presentation that comes from the 300B tubes
- Bass is extended and controlled
- Provides detail and insight into recordings without being piercing
- Soundstaging is wide, deep, and natural sounding
- Every stage in the amplifier has its own power supply, and particular care has been taken with the 300Bs themselves
Product Considerations
- The included remote is functional, but not in keeping with the quality of the amplifier itself
- It is very heavy, weighing 40kg
- The high polished chrome and gold accents may divide opinion
- Those looking for an amplifier that is absolutely neutral in its presentation may want to listen to something else
Comparisons (according to reviewers)
- Vs Merrill Thor amps, the Jadis I300, to the reviewer's ears, is a far superior amp for listening and putting a big grin on your face
Takeaway: The Jadis i300 is built superbly and delivers a balanced sound with detail and emotional connection, making it a joy to listen to. It is a refined performer across the audio spectrum and with all kinds of music.
Video review
Our take on the brand
Jadis Electronics is renowned for their meticulous handcrafting of tube amplifiers, with a unique process of hand-winding output transformers that's integral to their signature sound. Their tube amplifiers deliver unusually high power outputs without distortion even at maximum levels, setting them apart in the tube amplifier market.
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Thöress
SE-300B
10581
/
Released
2023
The SE300B Mono Amplifier is an all-tube power amplifier employing the famous classic 300B filamentary triode in single-ended operation mode for an output of up to 10 watts into a 4, 8 or 16 ohm loudspeaker load.
Thöress is a hifi brand known for its unique EHT Topology, which combines single-ended triode tubes with MOSFET output stages in Class-A mode, setting it apart from typical tube amplifiers through its transparency rather than warmth. The brand's products feature a distinctive vintage laboratory aesthetic with German labeling, and include the Phono Enhancer, which lets users adjust equalization curves on-the-fly without conventional tone controls.
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Our Summary
Product Strengths
- Pure sound, free of coloration while retaining musical detail, allows a graceful and effortless listening experience
- Natural and tangible sound due to accurate reproduction of details, creates a believable presentation
- Solid and controlled bass performance, unusual for a 300B single-ended triode amplifier
- Excellent sense of touch and tactile sound, making instruments like plucked strings and bowed violins sound very convincing
- Wide and deep soundstage with good 'air', providing a transparent and 'hear-through' sound, especially with complex music
Product Considerations
- Careful matching with partnering equipment is required, especially speakers with high efficiency
- Relatively low overall gain requires a source with a high output voltage
- Output transformer links need to be correctly set for speaker impedance, requiring dealer assistance
- Some reviewers found the top end sounding a bit rolled off before use of appropriate high efficiency speakers and source gain settings
- Changing the EL803S driver valves requires carefully matched pairs supplied by Thöress
Comparisons (according to reviewers)
- Vs Shindo Haut-Brion/Corton-Charlemagne, Thöress has more treble extension and transparency, Shindo has better upper-bass/lower-midrange substance and body—and more drive
Takeaway: The Thöress SE-300B offers a supremely musical and detailed listening experience with a focus on accuracy and sonic purity. When paired with the right speakers, this amplifier could be an excellent choice to bring out the best in music.
Video review
Our take on the brand
Thöress is a hifi brand known for its unique EHT Topology, which combines single-ended triode tubes with MOSFET output stages in Class-A mode, setting it apart from typical tube amplifiers through its transparency rather than warmth. The brand's products feature a distinctive vintage laboratory aesthetic with German labeling, and include the Phono Enhancer, which lets users adjust equalization curves on-the-fly without conventional tone controls.
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Riviera
AIC10-Bal
19800
/
Released
Riviera Labs designs amplifiers that match the human ear's natural distortion patterns, focusing on subjective listening experiences rather than technical specifications. Their products use a hybrid design combining tubes for signal processing and solid-state components for power stages, with the unique ability to switch between pure Class A and Class AB operation in their LEVANTE integrated amplifier.
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Our Summary
Product Strengths
- Restores faith in humanity during an age dominated by digital devices
- Outstanding product crafted with high-quality metalwork, including a thick engraved panel, heat sinks that match the rounded edges, and internal components that are hand-soldered onto double-sided, 2 mm thick circuit boards
- Hybrid amplifier using a dual triode in the preamp stage and Mosfets in the output stage, offering the possibility to customize the sound by experimenting with different valves
- Offers unparalleled control over bass and extension, the mids are incredibly authentic, while the highs are enchanting in their golden glow, also boasts impressive attack, dynamics, and rhythm, along with remarkable speed
- Exceptional analogue amplifier primarily designed for high-quality sound through headphones—that also excels as a speaker stereo amplifier
Product Considerations
- Expensive
- Speaker declared power output is just 10W/8 ohms, which is enough to power a pair of medium-sensitivity speakers (88dB) in a small room if you don't push it too hard
Comparisons (according to reviewers)
- Vs Pass Labs XA30.8: Low bass was a bit bloomier, and that its virtual needle on the elasticity-to-damping metre sat slightly deeper in the elasticity zone
Takeaway: The Riviera Labs AIC-10 BAL is a high-quality, all-analog hybrid amplifier that works great with headphones and speakers and is designed for a very pleasurable listening experience, built with human hearing in mind. This is the right choice if one wants the best sound possible.
Video review
Our take on the brand
Riviera Labs designs amplifiers that match the human ear's natural distortion patterns, focusing on subjective listening experiences rather than technical specifications. Their products use a hybrid design combining tubes for signal processing and solid-state components for power stages, with the unique ability to switch between pure Class A and Class AB operation in their LEVANTE integrated amplifier.
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