Ayre KX-R Twenty: Unleashing Audiophile Bliss


In today’s world of audio enthusiasts, the quest for high-quality sound amplification is paramount. Whether you’re a music lover, audiophile, or professional in the audio industry, having an amplifier that delivers exceptional sound performance can elevate your listening experience to new heights. In this review, we delve into the world of the Ayre KX-R Twenty amplifier – a true masterpiece in the realm of hifi sound amplification.

The Ayre KX-R Twenty is a preamplifier that embodies innovation and precision engineering. With its cutting-edge technology and meticulous attention to detail, this amplifier promises to deliver an unparalleled audio experience. From its technical specifications to its design and construction, we will explore every aspect of this remarkable piece of audio equipment.

Join us as we dive into the world of the Ayre KX-R Twenty amplifier and discover how it can transform your listening experience.

Technical Specifications

The Ayre KX-R Twenty amplifier is a high-quality preamplifier that offers impressive technical specifications. It delivers exceptional performance and versatility to enhance your audio experience.

With regards to power output, the amplifier provides a maximum power consumption of 65 watts. This ensures ample power to drive your speakers and deliver a dynamic and immersive soundstage.

The signal-to-noise ratio (SNR) and total harmonic distortion (THD) are key indicators of sound quality. The Ayre KX-R Twenty boasts an excellent SNR, ensuring clear and detailed audio reproduction with minimal background noise. Additionally, the THD is kept to a minimum, guaranteeing accurate sound reproduction without any unwanted distortions.

In terms of connectivity, the amplifier offers versatile input and output options. It features four pairs of XLR inputs, allowing you to connect multiple audio sources such as CD players, turntables, or streaming devices. Additionally, it includes four pairs of RCA inputs for added flexibility.

When it comes to outputs, the Ayre KX-R Twenty provides four pairs of XLR main outputs and four pairs of XLR record outputs. These outputs enable seamless integration with various audio systems and allow for bi-amping configurations if desired.

The amplifier supports a wide frequency response range from 0 Hz to an impressive 250,000 Hz. This broad frequency range ensures that every nuance and detail in your music is faithfully reproduced.

Furthermore, the Ayre KX-R Twenty has an unusually high input impedance of 2 megaohms. This high impedance allows for increased compatibility with a variety of cables but may also result in slight variations in sound character depending on the cable’s properties.

Overall, the technical specifications of the Ayre KX-R Twenty demonstrate its commitment to delivering exceptional audio performance and flexibility. Whether you are a discerning audiophile or a music enthusiast seeking unparalleled sound quality, this amplifier is sure to impress with its outstanding specifications.

Design and Construction

The Ayre KX-R Twenty amplifier boasts a sleek and elegant design that is sure to catch the eye of any audiophile. Its black color adds a touch of sophistication to any audio setup. The amplifier is constructed with utmost precision, using high-quality materials that ensure durability and longevity.

One notable design feature of the Ayre KX-R Twenty is its solid aluminum chassis, which is milled from a single 34-kilogram plate. This construction technique not only enhances the amplifier’s structural integrity but also helps to isolate each component in its own enclosed compartment, minimizing interference and vibration.

Efficient cooling is crucial for maintaining optimal performance, and the Ayre KX-R Twenty excels in this aspect. The amplifier is designed with ventilation slots strategically placed to facilitate heat dissipation, preventing overheating during prolonged use. This thoughtful design ensures that the amplifier operates at its best even under demanding conditions.

Connectors and switches play a vital role in the overall functionality of an amplifier, and the Ayre KX-R Twenty does not disappoint in this regard. The connectors are of exceptional quality, providing a secure and reliable connection for your audio sources. The switches are robust and responsive, giving you precise control over various settings.

In terms of design and construction, the Ayre KX-R Twenty sets a high standard. Its attention to detail, use of premium materials, efficient cooling system, and high-quality connectors and switches all contribute to its overall excellence. This amplifier is not only a treat for the ears but also a visually stunning addition to any audio setup.


The Ayre KX-R Twenty amplifier offers a wide range of functionality to cater to various audio sources. With its four pairs of RCA and XLR inputs, it provides ample connectivity options for CD players, turntables, computers, and other audio devices. Whether you prefer the convenience of digital sources or the warmth of analog playback, this amplifier has you covered.

One notable feature is the availability of balance controls, allowing users to adjust the balance between left and right channels for an optimal listening experience. This feature ensures that the soundstage is perfectly balanced, enhancing the overall audio performance.

In addition to balance controls, the Ayre KX-R Twenty also offers tone adjustments, allowing users to fine-tune the sound according to their preferences. Whether you prefer a more neutral sound or want to emphasize certain frequencies, this amplifier provides the flexibility to tailor the audio output to your liking.

Furthermore, this amplifier incorporates various operating modes to suit different scenarios. Whether you want to enjoy a private listening session or share your music with others, the Ayre KX-R Twenty has multiple outputs available. It features two pairs of XLR Main outputs for connecting to power amplifiers or active speakers, as well as two pairs of XLR Rec outputs for recording purposes or connecting to additional equipment.

Overall, the functionality of the Ayre KX-R Twenty is impressive, providing versatile connectivity options and intuitive control features. It ensures that users have complete control over their audio setup and can enjoy their music in various ways.

Sound Characteristics

The Ayre KX-R Twenty amplifier delivers an exceptional sound quality that is sure to captivate any audiophile. The attention to detail and precision in its design and construction result in a truly remarkable audio experience.

One of the standout characteristics of the Ayre KX-R Twenty is its ability to reproduce intricate details with incredible clarity. Every instrument and nuance in the music is rendered with exceptional precision, allowing for a truly immersive listening experience. The amplifier’s ability to separate instruments and vocals is outstanding, creating a spacious and three-dimensional soundstage.

The bass response of the Ayre KX-R Twenty is deep, powerful, and well-controlled. Whether it’s the thumping beats of electronic music or the resonating lows of a string bass, this amplifier delivers a tight and impactful bass performance. The low frequencies are reproduced with great accuracy, adding depth and richness to the overall sound.

In terms of treble clarity, the Ayre KX-R Twenty excels. The high frequencies are crisp, detailed, and well-extended, without any harshness or sibilance. The amplifier maintains a perfect balance between smoothness and transparency, ensuring that the treble remains clear and airy without becoming fatiguing.

The overall sound presentation of the Ayre KX-R Twenty is nothing short of exceptional. It offers a natural and balanced sound signature that stays true to the original recording. The amplifier faithfully reproduces the dynamics and emotions of the music, allowing listeners to fully immerse themselves in their favorite tracks.

The Ayre KX-R Twenty has a versatile sound signature that suits various music genres. It effortlessly handles delicate classical compositions, bringing out the intricate details and nuances in each orchestral section. In rock and pop genres, it showcases the energy and impact of electric guitars and drums with finesse. Jazz enthusiasts will appreciate its ability to reproduce the complex interplay between instruments, while audiophiles who enjoy electronic music will be delighted by its ability to render the intricate layers and textures of synth-based tracks.

Overall, the sound characteristics of the Ayre KX-R Twenty amplifier are truly remarkable. Its ability to reproduce details, separate instruments, deliver powerful bass, maintain treble clarity, and present a natural soundstage make it a top choice for discerning audiophiles across various music genres.

Sound Performance

The sound performance of the Ayre KX-R Twenty amplifier is nothing short of exceptional. It has the ability to transport the listener into a captivating auditory experience, where every nuance and detail of the music comes to life.

One of the standout qualities of this amplifier is its ability to faithfully reproduce audio signals with remarkable clarity. The sound is incredibly transparent, allowing the listener to hear every instrument and vocal with stunning precision. The level of detail retrieval is truly impressive, revealing subtle nuances in the music that may have gone unnoticed before.

In terms of dynamics, the Ayre KX-R Twenty delivers a powerful and impactful performance. It effortlessly handles both delicate passages and explosive crescendos, providing a dynamic range that brings music to life. The amplifier excels at conveying the emotional impact of a performance, making it feel as though you are right there in the recording studio or concert hall.

The tonal balance of the Ayre KX-R Twenty is also worth noting. It strikes a perfect balance between warmth and accuracy, ensuring that each instrument and voice retains its natural timbre. The bass is tight and controlled, while the midrange is rich and full-bodied. The high frequencies are detailed and extended without ever becoming harsh or fatiguing.

Across different frequency ranges, the Ayre KX-R Twenty maintains its exceptional performance. Whether it’s the deep rumble of a bass guitar or the delicate shimmer of cymbals, this amplifier reproduces each frequency with precision and finesse. The soundstage is wide and immersive, creating a sense of depth and dimensionality that adds to the overall listening experience.

In summary, the sound performance of the Ayre KX-R Twenty amplifier is simply outstanding. Its ability to faithfully reproduce audio signals with clarity, dynamics, and tonal balance across different frequency ranges is truly remarkable. Whether you’re a discerning audiophile or a music lover looking for an immersive listening experience, the Ayre KX-R Twenty is sure to impress.


The Ayre KX-R Twenty amplifier offers several notable advantages that set it apart from its competitors. Firstly, its use of the new Diamond Circuit output stage, featuring JFET field-effect transistors, allows for an extended frequency response of up to 250 kHz without the need for feedback. This results in a more accurate and detailed audio reproduction.

Additionally, the KX-R Twenty boasts a balanced signal path from input to output, which requires sophisticated volume control mechanisms due to the inherent variations in resistance among even the best potentiometers. Ayre has developed a unique attenuator with a rotary switch offering 60 positions. This innovative design incorporates four independent matrices containing approximately 400 ultra-precise resistors, controlled by a step motor with processor-based management. The 1 dB step adjustment is displayed on a blue numeric display, and turning the recessed knob creates an engaging rotating cylinder effect reminiscent of vintage tabletop clocks from the 70s.

The power supply system of the KX-R Twenty utilizes AyreLock technology, ensuring consistent current draw from the transformer and rectifier regardless of the load demand from the amplification stages. This enhances voltage stability and dramatically reduces noise on the power lines.

In terms of connectivity options, the KX-R Twenty outshines its competition with four pairs of XLR inputs and an equal number of RCA inputs. The amplified signal can be routed to two pairs of XLR main outputs or two pairs of XLR fixed-level outputs for recording purposes. This abundance of outputs allows for bi-amping configurations when connecting four monoblock amplifiers to the preamplifier. Each source can be assigned a custom name displayed on the front panel.

Furthermore, this preamplifier features an unusually high input impedance of 2 megohms, which is 100 times higher than what is typically found in consumer electronics. While this high impedance value can potentially accentuate cable characteristics, it also allows for a wider range of cable options and the ability to tailor the sound to personal preferences.

The Ayre KX-R Twenty’s solidly built chassis is milled from a single 34-kilogram aluminum plate, with each section of the circuitry housed in its own isolated compartment. This construction not only enhances durability but also minimizes interference between components.

In comparison to other models in its price range, the Ayre KX-R Twenty stands out with its exceptional build quality, advanced circuitry design, and meticulous attention to detail. Its unique volume control system, extensive connectivity options, and high input impedance make it a versatile and high-performing amplifier that competes favorably with other premium offerings on the market.

Overall, the Ayre KX-R Twenty amplifier offers a combination of innovative features, superior sound quality, and impeccable craftsmanship that distinguishes it as a top contender in its class.

Value for Money

The Ayre KX-R Twenty amplifier offers exceptional value for money, considering its outstanding performance, impressive features, and competitive price point.

In terms of performance, the KX-R Twenty delivers audio quality that is second to none. With its innovative Diamond Circuit output stage and JFET field-effect transistors, this amplifier achieves a wide frequency response of up to 250 kHz without the need for feedback. This results in incredibly accurate and detailed sound reproduction across the entire audio spectrum. The balanced design from input to output ensures optimal signal integrity and minimizes any potential interference or distortion.

The KX-R Twenty’s construction and design further contribute to its value proposition. The solid aluminum chassis, milled from a single 34-kilogram plate, not only provides excellent durability but also effectively isolates each circuit section in its own enclosed compartment. This attention to detail ensures optimal performance and longevity.

In terms of functionality, the KX-R Twenty offers an extensive range of inputs and outputs, including four pairs of XLR and RCA inputs, two pairs of XLR main outputs, two pairs of XLR rec outputs, and the ability to connect up to four monoblock amplifiers for bi-amping configurations. The unique attenuator with a rotary switch featuring 60 positions allows precise volume control with 1 dB increments, while the blue digital display provides clear level indication.

Considering its impressive performance capabilities and comprehensive set of features, the Ayre KX-R Twenty amplifier offers exceptional value when compared to other amplifiers in its class. While it may have a higher price point than some entry-level options, the level of audio quality and versatility it provides more than justifies the investment.

Overall, the Ayre KX-R Twenty amplifier offers excellent value for money by combining top-notch performance, meticulous design, extensive functionality, and a competitive price point. Whether you are an audiophile seeking uncompromising sound quality or a music enthusiast looking to elevate your listening experience, the KX-R Twenty is a worthwhile investment that will undoubtedly exceed your expectations.


In conclusion, the Ayre KX-R Twenty amplifier is a remarkable piece of audio equipment that delivers exceptional performance and versatility. With its advanced features and meticulous design, it offers an unparalleled listening experience.

The technical specifications of the Ayre KX-R Twenty are impressive, with a wide frequency range of 0 to 250,000 Hz and a maximum power consumption of 65 watts. The amplifier boasts four pairs of XLR and RCA inputs, allowing for flexible connectivity options. The absence of an onboard DAC or phono stage may be a drawback for some users, but the amplifier compensates for it with its outstanding sound quality.

The design and construction of the Ayre KX-R Twenty are top-notch. The solid aluminum chassis not only provides durability but also helps in isolating each component for optimal performance. The attention to detail in the construction is evident, making it a visually appealing addition to any audio setup.

Functionality-wise, the Ayre KX-R Twenty offers extensive options for customization and control. The unique attenuator with a rotary switch allows precise volume adjustments, while the multiple output options provide flexibility for bi-amping setups. The inclusion of a comprehensive remote control further enhances user convenience.

When it comes to sound characteristics, the Ayre KX-R Twenty truly shines. The use of JFET transistors in the Diamond Circuit output stage results in an extended frequency response without introducing feedback. This translates into exceptional clarity and accuracy across the entire audio spectrum. The balanced signal path ensures minimal interference and noise, further enhancing the overall listening experience.

In terms of sound performance, the Ayre KX-R Twenty delivers on its promise of high-fidelity audio reproduction. It excels in reproducing intricate details, capturing nuances in music that might otherwise go unnoticed. The dynamics are impressive, with a wide soundstage and precise imaging that brings music to life.

The advantages of owning the Ayre KX-R Twenty are numerous. Its meticulous design, exceptional sound quality, and extensive connectivity options make it a versatile and reliable amplifier. The build quality and attention to detail ensure longevity and reliability for years to come.

In terms of value for money, the Ayre KX-R Twenty is undoubtedly an investment. While it may be on the higher end of the price spectrum, the performance and features it offers justify the cost for audiophiles who demand the best in audio reproduction.

In conclusion, the Ayre KX-R Twenty amplifier is a standout product that delivers exceptional audio performance. Its meticulous design, versatile functionality, and outstanding sound characteristics make it a top choice for discerning music enthusiasts. Whether you are a casual listener or an avid audiophile, the Ayre KX-R Twenty will undoubtedly elevate your listening experience to new heights.

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