Micromega AS400: Elevating Audio Excellence


In today’s world of audio enthusiasts, the pursuit of high-quality sound amplification is a never-ending quest. Whether it’s for personal enjoyment, professional use, or creating an immersive home theater experience, having a reliable and powerful amplifier is essential. In this review, we will delve into the world of hifi sound amplification and explore the features and performance of the Micromega AS400 amplifier.

The Micromega AS400 is a groundbreaking integrated amplifier that utilizes the innovative AirStream technology. It is the first-ever integrated amplifier in the world to incorporate this cutting-edge technology, which takes the audio experience to a whole new level. Building upon the success of its predecessor, the IA-400, the AS400 combines its electrical design and components with an all-new AirStream module, resulting in unprecedented sound quality.

With its sleek and elegant design, the Micromega AS400 not only delivers exceptional performance but also adds a touch of sophistication to any audio setup. Its compact dimensions make it suitable for both small and large spaces, allowing you to enjoy high-quality sound without compromising on aesthetics.

Now let us dive into the technical specifications of this remarkable amplifier and explore its design and construction in more detail.

Technical Specifications

The Micromega AS400 amplifier boasts impressive technical specifications that contribute to its exceptional audio performance. With a power output of 400 watts per channel at 4 ohms, this amplifier delivers a robust and dynamic sound experience.

In terms of class, the AS400 utilizes Class AB amplification, which combines the efficiency of Class B amplifiers with the low distortion characteristics of Class A amplifiers. This ensures accurate and detailed sound reproduction across the entire frequency range.

The signal-to-noise ratio (SNR) of the AS400 is rated at 96 dB, indicating a high level of clarity and minimal background noise. This allows for a clean and immersive listening experience, where even the subtlest details can be heard with precision.

To further enhance sound quality, the AS400 has a total harmonic distortion (THD) rating of less than 0.01%. This means that the amplifier produces minimal distortion, resulting in faithful reproduction of audio signals without any added artifacts or coloration.

In terms of connectivity, the AS400 offers a range of inputs and outputs to accommodate various audio sources. It features four analog inputs, allowing you to connect multiple devices such as CD players, turntables (with its built-in MM phono stage), or media players. Additionally, it includes a headphone output for private listening and a preamp output for connecting to external power amplifiers or recording devices.

The amplifier supports a wide range of audio formats including AAC, AIFF, Apple Lossless, MP3, WMA, and WAV. This versatility ensures compatibility with different file types and enables you to enjoy your favorite music in high-quality resolution.

With a frequency response ranging from 10 Hz to 50 kHz (+0/-3 dB), the AS400 covers an extensive spectrum of audio frequencies. This wide frequency range allows for accurate reproduction of both deep bass notes and delicate high-frequency details.

Lastly, the AS400 has an output impedance of less than 150 mΩ, ensuring efficient power transfer to connected speakers and minimizing any potential impedance mismatch. This helps maintain the amplifier’s stability and ensures optimal performance.

Overall, the technical specifications of the Micromega AS400 amplifier demonstrate its commitment to delivering exceptional sound quality, versatility in connectivity options, and a solid foundation for an immersive audio experience.

Design and Construction

The Micromega AS400 amplifier boasts an elegant and sleek design that is sure to catch the eye of any audio enthusiast. Its black color adds a touch of sophistication to any setup. The amplifier is expertly crafted with attention to detail, ensuring a high-quality construction.

The materials used in the construction of the AS400 are of top-notch quality, guaranteeing durability and longevity. The sturdy chassis provides stability and protects the internal components from external factors. It is evident that Micromega has prioritized both form and function in the design of this amplifier.

One notable design feature of the AS400 is its efficient cooling system. With its well-ventilated design, heat dissipation is optimized, preventing overheating and ensuring optimal performance even during prolonged use. This feature not only enhances the reliability of the amplifier but also contributes to its longevity.

Furthermore, the AS400 is designed to minimize interference and maintain signal integrity. The high-quality connectors and switches used in this amplifier ensure a secure and reliable connection, allowing for seamless audio transmission. These components are built to last and provide a solid connection for your audio devices.

Overall, the design and construction of the Micromega AS400 amplifier are exemplary. Its sleek appearance, high-quality materials, efficient cooling system, and reliable connectors make it a standout choice for audio enthusiasts who value both style and performance.


The Micromega AS400 amplifier offers a wide range of functionality, making it a versatile and convenient choice for audio enthusiasts. With its comprehensive connectivity options, this amplifier allows you to easily connect various audio sources such as CD players, computers, smartphones, and more.

Whether you prefer the traditional approach of using a CD player or the convenience of streaming music from your smartphone, the AS400 has got you covered. It provides multiple analog inputs, allowing you to connect multiple devices simultaneously. This means you can switch between different audio sources without the hassle of constantly unplugging and replugging cables.

Additionally, the AS400 amplifier offers balance controls and tone adjustments, allowing you to fine-tune the audio output according to your preferences. Whether you want to boost the bass or enhance the treble, these adjustable settings provide flexibility in shaping the sound to suit your taste.

Furthermore, this amplifier offers various operating modes that cater to different listening scenarios. For example, it may feature a dedicated headphone output for private listening sessions or a monitor loop for connecting recording devices. These additional features enhance the overall functionality of the amplifier and provide added convenience and versatility.

Overall, the Micromega AS400 amplifier excels in terms of functionality by offering a wide range of connectivity options and adjustable settings. Whether you are a traditionalist who enjoys physical media or a tech-savvy individual who prefers streaming music from digital sources, this amplifier ensures seamless integration with your preferred audio sources while providing flexibility in sound customization.

Sound Characteristics

The Micromega AS400 amplifier delivers exceptional sound characteristics that will captivate any audiophile. With its advanced technology and meticulous design, this amplifier offers a truly immersive listening experience.

One of the standout features of the AS400 is its ability to provide incredible detail in the sound reproduction. Every instrument and vocal is rendered with remarkable clarity, allowing the listener to pick up on subtle nuances and intricacies within the music. The AS400 excels in instrument separation, creating a spacious and three-dimensional soundstage that brings the music to life.

The bass response of the AS400 is tight, controlled, and impactful. It effortlessly reproduces deep bass notes with precision, adding depth and richness to the overall sound. Whether you’re listening to electronic beats or orchestral compositions, the AS400 ensures that the low-end frequencies are reproduced accurately and with authority.

On the other end of the spectrum, the treble clarity of the AS400 is exceptional. High-frequency details are presented with finesse and sparkle, without ever sounding harsh or fatiguing. The amplifier strikes a perfect balance between smoothness and detail, allowing for an enjoyable listening experience across a wide range of music genres.

Speaking of music genres, the AS400 handles them all with finesse. From classical symphonies to rock anthems, this amplifier effortlessly adapts to the unique characteristics of each genre. It brings out the warmth in jazz recordings, the energy in pop tracks, and the raw power in heavy metal compositions. No matter what your musical preferences are, the AS400 ensures that every note is reproduced faithfully and with utmost precision.

In summary, the Micromega AS400 amplifier showcases outstanding sound characteristics that will impress even the most discerning audiophiles. Its ability to reproduce intricate details, create a spacious soundstage, deliver impactful bass, and present clear treble makes it a versatile option for any music lover. Regardless of your preferred genre, this amplifier will elevate your listening experience to new heights.

Sound Performance

The Micromega AS400 amplifier delivers an exceptional sound performance that will transport you into a world of immersive audio. With its advanced technology and precise engineering, this amplifier truly excels in faithfully reproducing audio signals with remarkable clarity, dynamics, and tonal balance across all frequency ranges.

When it comes to clarity, the AS400 leaves no room for compromise. Every note, every instrument, and every vocal is reproduced with stunning precision and detail. The amplifier’s ability to capture the subtle nuances in music allows for a truly immersive listening experience, where even the softest whispers can be heard with crystal-clear clarity.

The dynamics of the AS400 are simply outstanding. It effortlessly handles both delicate passages and explosive crescendos, ensuring that every musical moment is delivered with the utmost impact and emotion. Whether you’re listening to classical symphonies or rocking out to your favorite rock band, the AS400 will faithfully reproduce the dynamic range of the music, bringing it to life in a way that will leave you captivated.

One of the standout features of the AS400 is its impeccable tonal balance. The amplifier ensures that each frequency range is reproduced with precision and accuracy, resulting in a well-balanced soundstage that allows each instrument to shine. From the deep rumble of bass guitars to the sparkling highs of cymbals, every element of the music is presented with remarkable tonal accuracy, creating a rich and immersive listening experience.

No matter what genre of music you prefer, the Micromega AS400 amplifier will elevate your audio experience to new heights. Its ability to faithfully reproduce audio signals with clarity, dynamics, and tonal balance sets it apart from other amplifiers on the market. Whether you’re a discerning audiophile or simply someone who appreciates high-quality sound, the AS400 will deliver an auditory experience that is truly captivating.


The Micromega AS400 amplifier offers a range of advantages that set it apart from its competitors. Firstly, its use of the innovative AirStream technology provides a significant improvement in sound quality, delivering an unparalleled audio experience. This technology, combined with the high-quality components inherited from the IA-400 amplifier, ensures exceptional performance and clarity.

One of the standout advantages of the AS400 is its design and construction. The amplifier features a sleek and stylish polished black or silver casing, crafted to the highest standards. Its compact size allows for easy integration into any audio setup, while its solid build quality ensures durability and longevity.

In terms of functionality, the AS400 offers a comprehensive range of inputs and outputs to accommodate various audio sources. With four analog inputs, including an MM phono input for vinyl enthusiasts, users have the flexibility to connect multiple devices simultaneously. Additionally, the presence of a headphone output and a monitor ring for recording devices further enhances its versatility.

When comparing the AS400 to other models in its price range, it stands out as a top contender. Its powerful output of 400 watts per channel at 4 ohms ensures ample power for even demanding speakers. The wide frequency response range of 10Hz to 50kHz guarantees accurate reproduction of both low and high-frequency sounds. Furthermore, with a signal-to-noise ratio of 96dB, the AS400 minimizes unwanted noise and distortion, resulting in pristine audio playback.

The value for money offered by the Micromega AS400 is undeniable. Considering its exceptional build quality, advanced features, and impressive sound performance, it competes favorably with amplifiers in higher price brackets. The inclusion of the AirStream technology at this price point makes it an excellent investment for audiophiles seeking high-end audio reproduction without breaking the bank.

In conclusion, the Micromega AS400 amplifier presents numerous advantages that make it a standout choice in its category. Its utilization of AirStream technology, combined with its exceptional design, functionality, and sound characteristics, sets it apart from the competition. With its impressive performance and value for money, the AS400 is a compelling option for discerning audio enthusiasts.

Value for Money

The Micromega AS400 amplifier offers exceptional value for money with its impressive performance, extensive features, and reasonable price. This amplifier provides a high-quality audio experience that rivals more expensive options on the market.

In terms of performance, the AS400 delivers powerful and dynamic sound reproduction with a wide frequency range of 10Hz to 50kHz. The low output impedance of less than 150mΩ ensures accurate and precise audio delivery. With a signal-to-noise ratio of over 96dB, the amplifier produces clear and detailed sound, allowing you to fully immerse yourself in your favorite music.

The AS400 is equipped with various features that enhance its functionality. It includes four analog inputs, allowing you to connect multiple audio sources such as CD players, turntables, or streaming devices. The presence of an MM phono input enables direct connection to a turntable without the need for an external phono preamp. Additionally, the amplifier offers a headphone output for private listening and a subwoofer output for enhanced bass response.

Considering its technical specifications and feature set, the Micromega AS400 comes at a reasonable price point. It offers comparable performance to higher-priced amplifiers while providing additional convenience and versatility with its range of inputs and outputs. This makes it an excellent choice for both audiophiles and casual listeners who seek exceptional sound quality without breaking the bank.

Overall, the Micromega AS400 amplifier delivers exceptional value for money by combining top-notch performance, versatile features, and an affordable price. Whether you are a discerning audiophile or a casual listener looking to elevate your audio experience, this amplifier offers a compelling proposition that is hard to beat in terms of its price-performance ratio.


In conclusion, the Micromega AS400 amplifier is a powerful and impressive piece of audio equipment that delivers exceptional sound quality and performance. With its innovative AirStream technology and carefully designed construction, this amplifier sets a new standard in integrated amplifiers.

The technical specifications of the AS400 are truly impressive. With a power output of 400 watts per channel at 4 ohms, it provides ample power to drive even the most demanding speakers. The wide frequency range of 10Hz to 50kHz ensures accurate reproduction of both low and high frequencies, resulting in a dynamic and detailed soundstage. Additionally, the signal-to-noise ratio of 96dB ensures a clean and clear audio experience.

The design and construction of the AS400 are top-notch. The use of R-Core transformers and separate power supplies for different modules ensures stable and noise-free operation. The integration of the AirStream module takes this amplifier to a whole new level, providing unprecedented sound quality. The attention to detail in every aspect of its construction is evident, making it not only a high-performing amplifier but also an aesthetically pleasing addition to any audio setup.

Functionally, the AS400 offers versatile connectivity options with multiple analog inputs and outputs, including a phono input for vinyl enthusiasts. While it lacks internet connectivity or AirPlay support, it makes up for it with its superior audio performance.

Speaking of audio performance, the AS400 truly shines in this department. Its sound characteristics can be described as transparent, detailed, and realistic. The dynamic range is excellent, allowing for subtle nuances in music to be heard with precision. Whether you’re listening to classical music or energetic rock tracks, this amplifier faithfully reproduces every note with clarity and accuracy.

One of the major advantages of the Micromega AS400 is its value for money. While it may come at a higher price point compared to other amplifiers on the market, its exceptional build quality, advanced technology, and outstanding sound performance make it worth every penny. If you are a serious audiophile looking for a high-end amplifier that delivers uncompromising audio quality, the AS400 is definitely worth considering.

In conclusion, the Micromega AS400 amplifier is a remarkable piece of audio equipment that exceeds expectations in terms of design, functionality, and most importantly, sound performance. Its innovative AirStream technology and meticulous construction set it apart from its competitors. If you are in the market for a top-of-the-line amplifier that will elevate your listening experience to new heights, the Micromega AS400 is an excellent choice.

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