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
- Quietest, smoothest, most resolving, and most enjoyable preamp, even better than the original KX-R
- The Twenty upped the ante on everything that was special about the KX-R, making it special
- Excellent resolution and dynamics, exceptional rhythmic ability—impressive build and finish
Product Considerations
- Any shortcomings in the source or subpar speakers will short-change the amplifier's talents
- The VX-R Twenty runs hot, so ensure plenty of space around it for ventilation, also, at 36kg, it needs sturdy support
Comparisons (according to reviewers)
- The Twenty improves on the original KX-R's qualities.
- While the Burmester can set up a larger soundstage, the Ayre counters with a more focused image, one that is better layered and wonderfully stable
Takeaway: The KX-R Twenty is a top-tier preamplifier, arguably the most transparent and honest amplifier, delivering exceptional performance and enjoyment. Its improvements over the original make it a worthwhile investment for audiophiles seeking the best possible sound quality.
All
KX-R Twenty
reviews

Manufacturer details
- Input Impedance: 2 Mohm balanced (1 Mohm per phase)
- Output Impedance: 300 ohm balanced (150 ohm per phase)
- Frequency Response: DC – 250 kHz
- Power Consumption: 35 watts in standby or normal operation, 65 watts with remote control active
- Dimensions: 17.25″ W x 11.5″ D x 3.75″ H (43.8cm x 29.2cm x 9.5cm)
- Weight: 40 pounds (18 kg)
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:
- Ayre products are fully balanced and employ zero-feedback designs, prioritizing signal purity and a non-colored sound signature over textbook measurements.
- The company customizes rather than relies wholly on industry-standard DAC chips, opting instead to bypass much of their built-in functionality and create proprietary filters, clocking, and oversampling within a Xilinx FPGA for optimized performance.
- The brand emphasizes the importance of power supply design, employing custom EI-core transformers and linear power supplies, with particular attention paid to RF filtering and isolating various circuit sections.
- Machined casework from solid aluminum billets provides structural rigidity and isolates internal components, which together with stainless steel hardware, avoid magnetic materials known to negatively impact sound.
Select products
EX-8
- Positioning: A versatile all-in-one solution for modern audio systems.
- Description: Features a modular design and extensive connectivity options, including Ethernet, USB, and multiple digital inputs, making it ideal for users seeking a flexible and future-proof system. Unlike the VX-8, which focuses on pure amplification, integrates a DAC and streaming capabilities. Its 100 watts per channel power output is suitable for small to medium-sized rooms.
VX-8 Power Amplifier
- Positioning: A stereo power amplifier designed for high-quality sound reproduction in a traditional setup.
- Description: Features zero-feedback, fully-balanced circuitry, providing a warm and musical experience. Offers more power than the EX-8, with 100 watts per channel into 8 ohms. While it lacks the integrated DAC and streaming features of the EX-8, it excels in pure amplification.
AX-5 Twenty
- Positioning: An integrated amplifier that combines Ayre's advanced technologies in a single chassis for high-performance audio systems.
- Description: Features Double Diamond output stage and EquiLock circuitry, providing exceptional clarity and control. Offers more power than the EX-8, with 125 watts per channel. Unlike the VX-8, includes a preamplifier section, offering a more compact solution for those who want high-end performance without separate components.
VX-R Twenty
- Positioning: A high-end stereo amplifier that incorporates technologies from Ayre's flagship monoblocks into a single chassis.
- Description: Offers superior power and control with its 200 watts per channel output. Shares the zero-feedback, fully-balanced design with the MX-R Twenty but in a stereo configuration, providing a more affordable option for those who want flagship performance. Its advanced power supply and EquiLock technology ensure excellent clarity and resolution, setting it apart from the AX-5 Twenty and VX-8.
MX-R Twenty
- Positioning: Ayre's flagship monoblock amplifier, representing the pinnacle of their amplification technology.
- Description: Delivers exceptional power and precision with 300 watts per channel. Features Ayre's exclusive EquiLock and Double Diamond technologies, offering the highest level of clarity and control. Compared to the VX-R Twenty, provides even greater power and separation, designed for the most demanding audio setups.
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Used
Ayre
What if you spend more?
Our summary
Product Strengths
- A phonostage without compromise in every parameter of sound reproduction
- Easy access via three large front knobs for IMPEDANCE, CAPACITANCE, and GAIN
- Each phono input has its own discrete gain section, as it is a triple dual mono design
- The front panel has a large volume control and a display friendly to read from across the room
- Three pairs of RCA inputs in the back and one pair of RCA and XLR outputs
Product Considerations
- The Pass Labs XS Phono comes in two large chassis
- Pass Labs products are not known for being space saving
- The lack of balanced inputs or an EQ button for early Decca and Columbia pressings might be annoying
- Blue LEDs are built into each change segment of the three large knobs as well as above the push-buttons, though the minimal brightness suggests close proximity operation is expected
Takeaway: The Pass XS Phono exceeds what the reviewer has heard regarding analog playback, with incredible versatility that makes music sound effortless and is worth the investment. If you have multiple turntables, it has musicality at your disposal.
Video review
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Our summary
Product Strengths
- Highly optimized to provide a pure musical outcome in the absence of mechanical sonic traits
- Full tube, pure class A, zero feedback circuit design
- Fully balanced operation achieved with ultra-high-quality transformers on both inputs and outputs with mu-metal core and mu-metal shielding
- Massive, machined aluminum enclosure was designed from the very beginning to deal with unwanted micro-vibrations and resonances
Product Considerations
- May require careful system matching due to its harmonically rich inner kernel
Comparisons (according to reviewers)
- Vs Robert Koda Takumi K-10 preamplifier: Both similarly addressed inner clockings
Takeaway: The Riviera Audio Labs APL-01SE is a remarkable preamplifier with a unique approach to music reproduction and a design focused on sonic purity. Its vibrant sound and exceptional build quality make it a standout choice in the hifi market.
Video review
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Product Strengths
- Utterly posh and elegant behavior with a romantic sound profile built upon a somewhat elevated tonal temperature, round edges, remarkable smoothness, sensible heft, and spatial humidity
- Equally gifted on romance and tone as it was on crack, snap, and vigor, making it fabulously balanced
- Staged even deeper than the Trilogy 915R, and enveloped key sound sources by more air to make them even more distinctive
- Weightier upper registers that lingered in air for longer, and heftier bass that dug deeper was still held in as tight of a grasp
- Hand-polished mirror-like chassis built upon 2mm 316L stainless steel sheets that are non-corrosive, non-magnetic, and better in damping micro-vibrations via mass
Product Considerations
- The shiny chassis is a potent fingerprint attractor, and gets very hot near tubes
- The menu can't be accessed via the remote control, and doesn't cover naming inputs and dimming display
- No DC trigger ports are available to conveniently power on the entire set with other Audio Phonique products via just one button press
Comparisons (according to reviewers)
- Vs Trilogy 915R: The PRE DHT artfully combined tone, muscularity, roundness, and euphony to imaging size, illumination, top extension, quickness, and control downstairs—emerging as the more sorted wholesome product
Takeaway: The Audio Phonique PRE DHT is a luxuriously executed and brilliantly voiced preamplifier that offers both romantic sound qualities and high-performance capabilities. It is an ambitious product that can elevate the listening experience.
Video review
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Our summary
Product Strengths
- Phenomenal reproduction of instruments and vocalists in the bass, midbass, and lower mids, delivering power-range octaves with speed, definition, and impact
- Exceedingly neutral timbral balance, neither top-down nor bottom-up
- Astonishingly transparent to sources, revealing both how the music was recorded and performed
- Creates a continuous soundfield, weaving details together into near-palpable wholes within a seamless soundscape
- Limited I/O, with only two sets of RCA inputs—one mm and one mc—and a single pair of RCA outputs; there are no balanced connections
Product Considerations
- Occasional tendency to shoutiness in the upper midrange, particularly on very hard transients at very high volumes—source-dependent
- Lacks modern features like a rumble filter, alternative EQ curves, and a digital readout of loading values
- Granularity of potentiometers for resistive and capacitive loading has broad gaps between values
Comparisons (according to reviewers)
- Vs Soulution 755, the PH3.8 NEXTGEN is better in timbral neutrality, as the Soulution is a bit dark-sounding
Takeaway: The Goldmund PH3.8 NEXTGEN delivers realistic, revealing, and deeply enjoyable sound, excelling in bass reproduction and timbral neutrality. For vinyl enthusiasts, this product is a reference-grade phonostage that merits auditioning.
Video review
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What competes at this price?
The newly developed fully balanced LCR EQ circuit produces a detailed and solid soundstage. The hearing experience is comparable to listening to a master tape and makes one forget that the source is a vinyl disc. This unique circuit also brings intensity of music to the listener and transports him/her to the concert hall. It enables the listener to experience live performance on stage, rather than the traditional feeling of listening to the performance at a great distance in the audience seat of the concert hall. When played back by the correct equalization curve and phase with this circuit, stereo LPs will present us with a wonderful and amazing world of music never experienced before.
Our Summary
Product Strengths
- The Zanden 1200 Signature has a fully balanced circuit throughout, which results in more stable and better-quality performance
- Music is delivered from a deep black background of silence, resulting in a very quiet performance
- Profoundly dynamic with a scale and sense of realism, it puts the listener right in the middle of the music
- The sound is musically inviting without warming it up, insightful without sounding unnecessarily exuberant, detailed without sounding etched or bland, and dynamic without sounding unhinged
- A wide soundstage with uncommon depth and layering, as well as strong and stable images, are presented
Product Considerations
- There is no fine tuning of impedance, gain or capacitance to match different phono cartridges, only two main MC options are available
- The alternate EQ curves have relatively higher output than RIAA EQ
Comparisons (according to reviewers)
- Vs Pass Labs XP-25: The Zanden created more air and space within a deeper soundstage, was more robust with consistently finer-grained vocal and instrumental presentations, better dynamic shadings, and tighter bass
- Vs Zanden 120: The 1200S exhibited a softer hand and lighter touch with the music, providing more nuanced presentations sensitive to the dynamic and tonal shadings of instrumental and vocal performances, and it had an easier time with soundstage depth, layering, and fortissimo passages
Takeaway: The Zanden 1200 Signature is a meticulously crafted phono preamplifier that offers engaging sound, flexibility, and a refined musical experience with excellent dynamics and detail. It delivers a natural presentation of instruments and vocals creating an immersive soundstage.
Video review
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Our Summary
Product Strengths
- The Gryphon Pandora is considered 'one hell of a line stage' and is highly recommended for any Gryphon amplifier
- It delivers a 'huge, huge sound' with a massive, wall-to-wall, ceiling-to-floor presentation
- It provides a lot of bottom end control, punch, and muscle, with clear string plucking and well-marked edges on a guitar
- Top notch construction
- The Pandora just sounds like music
Product Considerations
- The back feet on the Pandora are spikes, which can scratch the surface it's placed on, such as wood shelves
- The design with spikes on both chassis prevents stacking, requiring two shelves
- Requires two expensive power cords
- No polarity switching
Comparisons (according to reviewers)
- The Pandora has a larger soundstage, wrapping around the listener, while the Boulder focuses on the space between the speakers with detail and separation
- If in a position to upgrade from the Gryphon Essence line stage, the Pandora is recommended
- The Pandora clicks better with the Gryphon amplifier
Takeaway: The Gryphon Pandora is a great line stage to go with any Gryphon amplifier, delivering a huge and powerful sound. It is a worthwhile purchase for those seeking a high-quality audio experience, especially within the Gryphon ecosystem.
Video review
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Our Summary
Product Strengths
- Neutral as possible while retaining all the music's delicacy, refinement, and fluidity, being revealing without becoming clinical
- Wide and deep soundstage, timbrally spot-on and very natural, well-focused, richly textured, and well-endowed in terms of transient attack and dynamic impact
- Significantly more revealing, without introducing any negative by-products such as dryness or a lack of emotional involvement
- More discerning of differences in sources and source material, enlarging the contrast between them
- A blacker background—low-level details can be heard more clearly
Product Considerations
- Calibration is mandatory after the upgrade from C1 to C1.2, as the calibration of the C1.2 is different from the one in the C1, and failure to do so will lead to degraded performance
- Without calibration, the sound can be super-crisp, tight, direct, and highly rhythmic, but also quite square and technical, and with the flow and emotional involvement on a much lower level
- Files played directly from the C1.2 have a slightly contoured character—everything is accurate, powerful, energetic, but sometimes even too accurate
- The C1 sounded fuller than other CH Precision products, and the C1.2 upgrade brings it more in line with other products
Comparisons (according to reviewers)
- Vs dCS Vivaldi 2.0: Clear and precise sound, although the dCS has some softness making it seem a bit warmer
- Vs Weiss DA502 D/A converter: A similar vision of clear and precise sound
- Vs Ayon Audio CD-35 HF Edition: Better timbral dissimilarity of individual instruments and portrayed them on a better-organized soundstage with more dimensions
- Vs ESOTERIC K-01D: Well-placed space, similar to the ESOTERIC K-01D, despite their tonal differences
Takeaway: The C1.2 is a very resolving and revealing DAC that presents music with exceptional clarity and precision, able to enhance subtle details in music. It is a great way to appreciate the details of music.
Video review
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Our Summary
Product Strengths
- Features an LDR (Light-dependent resistor) based Switchless Optical Input board, which is extremely quiet thanks to its switchless principle
- Has a separate power supply
- Features a new Aavik analogue crossover designed to either very precisely control a subwoofer or, with the integrated low pass and high pass filter—to control a 2.1 home theatre system
- Engineered enclosure offers an authentic sound that is warm, harmonious, and powerful, yet crisp and refined—highlighting every detail in the music
- Line stage features a unique inverted Virtual Ground amplifier topology that supplies maximum stability, maintaining the full signal with the lowest signal-to-noise ratio, making even the finest details of timbre and texture nuances audible on an extremely quiet soundstage
Product Considerations
- The Aavik C-580 is expensive
Takeaway: The Aavik C-580 is a versatile preamplifier for audiophiles and music lovers, with unique features that provide clarity, detail, and accuracy in music playback—creating a realistic and immersive audio experience. It offers high-end sound and aesthetics that will last for years.
Video review
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Our Summary
Product Strengths
- Massive and strong sound, with a low-set point of gravity
- Large and strong sound with deep bass
- Full-bodied headphone amplifier with adjustable gain
- Excellent functionality, design, and equipment
Product Considerations
- Treble is rather dark
- 3D imaging is a little worse compared to some other preamps
Comparisons (according to reviewers)
- Vs Accuphase C-3850: The C-3900 is unambiguously better with more depth, velvety sound, high resolution, and detail
Takeaway: The Accuphase C-3900 offers a well-balanced sound with density, warmth, and clarity, making it a top high-end choice for audiophiles. It also includes an excellent headphone amplifier, adding to its value and versatility.
Video review
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