Sim Audio MOON 400M: Elevating Sound to Astronomical Heights


In the world of audio enthusiasts, high-quality sound amplification is a crucial component for achieving an immersive and captivating listening experience. Whether it’s enjoying music, movies, or gaming, having a reliable and powerful amplifier can make all the difference. Today, we delve into the world of hifi sound amplifiers with a focus on the Sim Audio MOON 400M.

The Sim Audio MOON 400M is a monoblock power amplifier that promises to deliver exceptional audio performance and precision. With its sleek design and advanced features, this amplifier aims to elevate your audio experience to new heights. In this review, we will explore its technical specifications, design and construction, functionality, sound characteristics, sound performance, advantages, value for money, and ultimately provide a comprehensive conclusion.

Join us as we dive into the world of the Sim Audio MOON 400M amplifier and discover how it can enhance your audio setup. Whether you are an audiophile seeking ultimate sonic clarity or a home theater enthusiast looking for immersive surround sound, this amplifier aims to deliver an unparalleled listening experience. Stay tuned for an in-depth analysis of its features, characteristics, and performance that will help you make an informed decision about this remarkable amplifier.

Technical Specifications

The Sim Audio MOON 400M is a powerful monoblock amplifier designed to deliver exceptional audio performance. With its robust construction and advanced features, this amplifier is a standout choice for audiophiles seeking high-quality sound reproduction.

Featuring a power output of 400 watts at 8 ohms and 650 watts at 4 ohms, the MOON 400M provides ample power to drive even the most demanding speakers. This ensures that every detail of your music is reproduced with precision and accuracy. The amplifier operates in Class AB, combining the efficiency of Class D amplifiers with the sonic purity of Class A amplifiers.

When it comes to sound quality, the MOON 400M excels with its impressive signal-to-noise ratio (SNR) of 106 dB. This means that the amplifier delivers a clean and noise-free signal, allowing you to enjoy your music without any unwanted distractions. Additionally, the total harmonic distortion (THD) is kept to a minimum, ensuring that the audio reproduction remains faithful to the original recording.

The MOON 400M offers versatile connectivity options with both XLR (cannon) and RCA (jack) input connectors. This allows you to connect various audio sources such as CD players, turntables, or streaming devices. The amplifier supports a wide range of audio formats, ensuring compatibility with your favorite music files.

With a frequency response ranging from 10 Hz to 125,000 Hz, the MOON 400M captures every nuance and detail in your music. Whether you’re listening to delicate classical pieces or bass-heavy electronic tracks, this amplifier delivers a balanced and accurate soundstage. The impedance of the amplifier is optimized for both low and high-impedance speakers, ensuring compatibility with a wide range of speaker systems.

In summary, the Sim Audio MOON 400M impresses with its powerful performance and exceptional sound quality. Its technical specifications, including its power output, SNR, THD, and frequency response, demonstrate its ability to reproduce music with accuracy and fidelity. With versatile connectivity options and compatibility with various audio formats, this amplifier offers flexibility in connecting your preferred audio sources. Whether you’re a discerning audiophile or a music enthusiast, the MOON 400M is sure to elevate your listening experience.

Design and Construction

The Sim Audio MOON 400M amplifier boasts a sleek and modern design that will undoubtedly catch the eye of any audio enthusiast. Its black color adds a touch of elegance, making it a visually appealing addition to any audio setup.

In terms of construction, the MOON 400M showcases exceptional craftsmanship. The amplifier utilizes high-quality materials that not only enhance its durability but also contribute to its overall performance. The attention to detail in its design is evident, showcasing Sim Audio’s commitment to delivering a product of superior quality.

One notable design feature of the MOON 400M is its geometry, specifically developed to effectively manage heat dissipation. This ensures that the amplifier remains cool even during prolonged use, preventing any potential overheating issues that could compromise its performance or longevity.

Furthermore, the MOON 400M incorporates symmetrical input connectors, including “cannon” (XLR) and “jack” (RCA) connections. These connectors are not only sturdy but also provide excellent signal transmission, minimizing interference and preserving the integrity of the audio signal.

The quality of connectors and switches is crucial in an amplifier, as they directly impact the overall user experience. Fortunately, Sim Audio has spared no expense in this regard. The connectors and switches on the MOON 400M are robust and well-built, ensuring a secure and reliable connection every time. This attention to detail further enhances the amplifier’s overall performance and longevity.

Overall, the design and construction of the Sim Audio MOON 400M amplifier are top-notch. From its visually appealing exterior to its efficient cooling system and high-quality connectors, every aspect has been carefully considered to deliver an amplifier that not only looks impressive but also performs exceptionally well.


The Sim Audio MOON 400M amplifier offers a wide range of functionality, making it a versatile choice for audio enthusiasts. It provides a variety of connectivity options, allowing you to connect different audio sources such as CD players, computers, smartphones, and more. Whether you prefer to listen to your favorite music through traditional sources or stream it from your digital devices, this amplifier has got you covered.

One notable feature of the MOON 400M is the availability of balance controls and tone adjustments. These allow you to fine-tune the audio output according to your personal preferences, ensuring an immersive and customized listening experience. Whether you want to enhance the bass for a more impactful sound or adjust the treble for a crisper high-end response, this amplifier gives you the flexibility to tailor the audio to your liking.

In addition to balance controls and tone adjustments, the MOON 400M also offers various operating modes that further enhance its functionality. These modes may include options like stereo mode for a traditional two-channel setup, mono mode for a single-channel configuration, or even bridged mode for increased power output. This versatility allows you to adapt the amplifier to different audio setups and optimize its performance based on your specific requirements.

Overall, the functionality of the Sim Audio MOON 400M amplifier is impressive. With its diverse connectivity options and adjustable settings, it caters to a wide range of audio sources and preferences. Whether you are a casual listener or an audiophile seeking precise control over your sound, this amplifier offers the flexibility and functionality needed to elevate your audio experience.

Sound Characteristics

The Sim Audio MOON 400M amplifier delivers exceptional sound characteristics that are sure to impress even the most discerning audiophiles. Its ability to reproduce audio with stunning clarity and precision makes it a standout choice in the market.

One of the standout features of the MOON 400M is its incredible detail retrieval. Every nuance and subtlety in the music is brought to life, allowing you to hear intricate details that may have previously gone unnoticed. The instrument separation is outstanding, creating a spacious soundstage where each instrument occupies its own defined space. This level of separation adds depth and realism to the listening experience, making you feel like you’re in the midst of a live performance.

The bass response of the MOON 400M is tight, controlled, and impactful. It effortlessly reproduces deep lows with authority, without overpowering or muddying the rest of the frequency range. Whether it’s a thumping bass line or a delicate low-frequency rumble, this amplifier handles it with finesse, adding depth and richness to the overall sound.

The treble clarity of the MOON 400M is exceptional, providing a level of detail and transparency that brings out the finest nuances in high-frequency sounds. The highs are crisp and well-defined without any harshness or sibilance, ensuring a smooth and enjoyable listening experience.

In terms of overall sound presentation, the MOON 400M offers a balanced and natural sound signature. It maintains accuracy and fidelity across all frequencies, resulting in a cohesive and engaging musical experience. Regardless of the genre you prefer, whether it’s classical, rock, jazz, or electronic music, this amplifier excels at reproducing each genre with authenticity and precision.

With its ability to elevate your listening experience by delivering exceptional detail retrieval, instrument separation, bass response, treble clarity, and overall sound presentation, the Sim Audio MOON 400M proves itself as an outstanding amplifier that truly enhances the enjoyment of music across various genres.

Sound Performance

The Sim Audio MOON 400M amplifier delivers an exceptional sound performance that will transport you into a captivating auditory experience. With its ability to faithfully reproduce audio signals, this amplifier truly stands out in terms of clarity, dynamics, and tonal balance across different frequency ranges.

When it comes to clarity, the MOON 400M excels at providing a clean and transparent sound. Each instrument and vocal is presented with remarkable precision and detail, allowing you to hear every subtle nuance in your music. The amplifier’s low distortion levels ensure that the audio signals remain pure and uncolored, providing an accurate representation of the original recording.

The dynamics of the MOON 400M are truly impressive. It effortlessly handles both delicate passages and explosive crescendos with finesse and control. The amplifier’s ability to deliver impactful and dynamic sound adds depth and excitement to your listening experience, making every note come alive.

Tonal balance is another area where the MOON 400M shines. It offers a well-balanced sound signature that ensures each frequency range is reproduced with accuracy and precision. The bass is tight and controlled, providing a solid foundation to the music, while the midrange is rich and detailed, allowing vocals and instruments to shine. The highs are crisp and extended, adding sparkle and airiness to the overall sound.

Whether you’re listening to classical symphonies or energetic rock tracks, the MOON 400M delivers a sound performance that will leave you immersed in the music. Its ability to capture the essence of each recording with its clarity, dynamics, and tonal balance is truly remarkable.

In conclusion, the Sim Audio MOON 400M amplifier offers an exceptional sound performance that will satisfy even the most discerning audiophiles. Its ability to faithfully reproduce audio signals with clarity, dynamics, and tonal balance makes it a standout choice for those seeking an immersive listening experience.


The Sim Audio MOON 400M amplifier offers several distinct advantages that set it apart from its competitors in the market. Firstly, its innovative design and construction ensure efficient heat dissipation, preventing the amplifier from overheating during prolonged use. This attention to detail not only enhances the longevity of the device but also guarantees uninterrupted performance.

Additionally, the MOON 400M boasts an expanded power supply unit with a large toroidal transformer, providing a substantial capacitance of almost 100,000μF. This impressive power supply contributes to exceptional stability and dynamic range, allowing for precise and accurate sound reproduction across a wide frequency spectrum.

Furthermore, the inclusion of both XLR (cannon) and RCA (jack) symmetrical input connectors adds versatility to the amplifier. This feature enables seamless integration into various audio setups, ensuring compatibility with different sources and devices.

When compared to other models in its price range, the Sim Audio MOON 400M stands out as a top-performing device that strikes an excellent balance between affordability and performance. Its robust power output of 650 watts per channel at 4 Ohms and 400 watts per channel at 8 Ohms surpasses many competing amplifiers in terms of sheer power delivery. This capability allows for driving demanding speakers with ease and provides ample headroom for even the most dynamic audio recordings.

In conclusion, the Sim Audio MOON 400M amplifier offers several advantages that make it a standout choice in its category. Its superior heat management system, expansive power supply unit, versatile input connectors, and impressive power output combine to create an amplifier that excels in both functionality and performance. Whether used in a professional studio or a high-end home audio setup, this amplifier delivers exceptional audio quality that is sure to satisfy even the most discerning audiophiles.

Value for Money

The Sim Audio MOON 400M amplifier offers exceptional value for money, providing a combination of outstanding performance, impressive features, and a reasonable price point. When considering the amplifier’s capabilities and build quality, it becomes evident that it offers a high level of value compared to other amplifiers in its class.

In terms of performance, the MOON 400M delivers exceptional audio reproduction with its powerful 650 watts per channel at 4 ohms and 400 watts per channel at 8 ohms. This level of power ensures that the amplifier can effortlessly drive even demanding speakers, delivering dynamic and detailed sound across the entire frequency range. The amplifier’s low signal-to-noise ratio of 106 dB further enhances its performance by minimizing background noise and allowing for a more immersive listening experience.

Additionally, the MOON 400M boasts an impressive set of features that further contribute to its value proposition. The inclusion of both XLR and RCA input connectors provides flexibility in connecting various audio sources, accommodating different setups and preferences. The amplifier also includes a headphone output, allowing for private listening without compromising on audio quality. These thoughtful additions enhance the versatility and usability of the amplifier, making it suitable for a wide range of audio setups.

Considering its technical specifications, design quality, and functionality, the price point of the MOON 400M is highly competitive. While there are amplifiers available at higher price ranges, the MOON 400M offers comparable performance and features without breaking the bank. This makes it an attractive option for both audiophiles seeking high-quality sound reproduction and enthusiasts looking to upgrade their audio system without overspending.

In conclusion, the Sim Audio MOON 400M amplifier provides excellent value for money. Its impressive performance capabilities, versatile features, and reasonable price make it a compelling choice for anyone in search of a high-quality amplifier that delivers exceptional audio performance without compromising on affordability. Whether you are an avid music lover or a discerning audio enthusiast, the MOON 400M offers a compelling value proposition that is hard to ignore.


In conclusion, the Sim Audio MOON 400M amplifier is a powerful and impressive audio device that delivers exceptional performance and versatility. With its advanced features, solid construction, and outstanding sound quality, it stands out as a top contender in its class.

Throughout this review, we have explored the technical specifications, design, functionality, sound characteristics, and performance of the MOON 400M. Its monoblock configuration ensures optimal power delivery to your speakers, while the extensive cooling system effectively prevents overheating. The inclusion of a large toroidal transformer in the expanded power supply further enhances its performance.

The MOON 400M offers both XLR and RCA input connectors, providing flexibility for different audio sources. Its sleek black design adds a touch of elegance to any audio setup. Additionally, the amplifier comes with a headphone output for personal listening enjoyment.

When it comes to sound characteristics, the MOON 400M excels in delivering a clean and detailed audio reproduction. With a wide frequency range from 10 Hz to an impressive 125,000 Hz, it captures every nuance of your music with precision. The signal-to-noise ratio of 106 dB ensures minimal distortion and maximum clarity.

In terms of sound performance, the MOON 400M truly shines. It effortlessly drives speakers with its impressive power output of 650 watts at 4 Ohms and 400 watts at 8 Ohms. Whether you’re listening to delicate classical pieces or rocking out to energetic rock music, this amplifier delivers an immersive and engaging listening experience.

One of the key advantages of the MOON 400M is its combination of affordability and performance. While it may not have Wi-Fi or Bluetooth connectivity like some other amplifiers on the market, its focus on delivering exceptional audio quality makes it well worth considering for serious audiophiles.

For those seeking a high-quality amplifier that prioritizes audio performance above all else, the Sim Audio MOON 400M is an excellent choice. Its powerful output, clean sound reproduction, and solid construction make it a reliable and impressive addition to any audio system.

Overall, the Sim Audio MOON 400M amplifier offers outstanding value for money. Its exceptional performance and versatility make it a worthwhile investment for music enthusiasts who demand the best audio experience.

In conclusion, if you’re in search of an amplifier that combines affordability, power, and superb sound quality, the Sim Audio MOON 400M is a fantastic option that will elevate your listening experience to new heights.

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