Gato Audio DIA-400: Unleashing the Power of High-Fidelity Sound


In today’s world, where music and audio play a significant role in our lives, the importance of high-quality sound amplification cannot be overstated. Whether you are a music enthusiast, a movie lover, or an audiophile seeking the ultimate listening experience, having a reliable and powerful amplifier is crucial. In this review, we will delve into the world of hifi sound amplification and explore the features and performance of the Gato Audio DIA-400 amplifier.

The Gato Audio DIA-400 is a state-of-the-art integrated amplifier designed to deliver exceptional sound quality and versatility. With its advanced technology and sleek design, it aims to provide a seamless integration of various audio sources while maintaining a compact form factor. This amplifier promises to elevate your audio experience to new heights, whether you are enjoying your favorite music or immersing yourself in a captivating movie soundtrack.

Join us as we dive into the technical specifications, design and construction, functionality, sound characteristics, sound performance, advantages, value for money, and ultimately draw our conclusion on the Gato Audio DIA-400 amplifier. Let’s explore how this amplifier can enhance your audio journey and bring you closer to the music you love.

Technical Specifications

The Gato Audio DIA-400 amplifier is a powerful integrated amplifier that offers impressive technical specifications. It operates in Class-D with a unique soft analog sound, providing a balance between power, musicality, and versatility.

With a power output of 800 watts per channel at 4 ohms and 400 watts per channel at 8 ohms, the DIA-400 delivers ample power to drive even the most demanding speakers. The amplifier features a high signal-to-noise ratio of 110 dB, ensuring clean and clear audio reproduction with minimal background noise. Additionally, the total harmonic distortion is kept at an impressively low level of 0.01%, guaranteeing accurate and faithful sound reproduction.

The DIA-400 offers a range of input options to accommodate various audio sources. It includes one coaxial audio input, one optical audio input, two RCA analog inputs, and one XLR balanced input. This versatility allows you to connect multiple devices such as CD players, turntables, or streaming devices.

In terms of output options, the amplifier provides one XLR balanced output and one RCA line-level output. These outputs enable you to connect additional amplifiers or audio equipment to expand your system setup.

The DIA-400 supports a wide range of audio formats with its high-resolution digital-to-analog converter (DAC). With a bit depth of 24 bits and a sampling frequency of up to 192 kHz, it ensures exceptional audio quality for both standard and high-resolution audio files.

Furthermore, the amplifier boasts an impressive frequency response range from 2 Hz to 70 kHz, allowing for accurate reproduction of both low and high-frequency sounds. The DIA-400 also offers stable impedance throughout its frequency range, ensuring compatibility with a wide range of speakers.

Overall, the Gato Audio DIA-400’s technical specifications demonstrate its ability to deliver powerful and precise sound reproduction across a wide range of audio sources and formats. Its high power output, low distortion, and versatile input/output options make it a highly capable and flexible amplifier for audiophiles and music enthusiasts.

Design and Construction

The Gato Audio DIA-400 amplifier boasts a sleek and modern design that is sure to catch the eye of any audio enthusiast. Its compact size and black color give it a sophisticated and elegant look, making it a stylish addition to any audio setup.

In terms of construction, the DIA-400 is built with high-quality materials that ensure durability and longevity. The chassis is sturdy and well-built, providing a solid foundation for the internal components. The attention to detail in its construction is evident, with clean lines and smooth edges that add to its overall aesthetic appeal.

One notable design feature of the DIA-400 is its efficient cooling system. The amplifier incorporates heat sinks and ventilation slots, allowing for effective heat dissipation during prolonged use. This ensures that the amplifier remains cool even during demanding audio sessions, preventing overheating and potential damage to the internal components.

Additionally, the DIA-400 is designed to minimize interference and maintain signal integrity. It utilizes high-quality connectors and switches that are carefully selected for their performance and reliability. These connectors provide secure connections with minimal signal loss, ensuring optimal audio transmission from source to speakers.

Overall, the design and construction of the Gato Audio DIA-400 amplifier exemplify attention to detail and quality craftsmanship. Its sleek exterior, efficient cooling system, and high-quality connectors contribute to both its visual appeal and its ability to deliver exceptional audio performance.


The Gato Audio DIA-400 amplifier offers a wide range of functionality, making it a versatile choice for audio enthusiasts. It provides various connectivity options, allowing you to connect different audio sources such as CD players, computers, smartphones, and more. With its multiple inputs, including one coaxial audio input, one optical audio input, one XLR analog input, and two RCA analog inputs, you can easily connect your preferred devices to enjoy high-quality sound.

One notable feature of the DIA-400 is its balanced input, which ensures superior signal transmission and minimizes interference for a cleaner and more accurate sound reproduction. This amplifier also includes a USB port for connecting compatible devices.

In terms of operating modes, the DIA-400 offers a range of options to customize your listening experience. It includes balance controls that allow you to adjust the audio balance between the left and right channels. Additionally, this amplifier provides tone adjustments, allowing you to fine-tune the bass and treble levels according to your preferences.

Furthermore, the DIA-400 features a Direct mode that bypasses unnecessary circuitry to provide a pure and unaltered audio signal path. This mode is ideal for audiophiles who prefer a transparent and uncolored sound reproduction.

Overall, the Gato Audio DIA-400 excels in terms of functionality by providing various connectivity options and adjustable settings. Whether you want to connect your favorite audio sources or customize the sound according to your taste, this amplifier offers an impressive array of features that enhance your overall listening experience.

Sound Characteristics

The Gato Audio DIA-400 amplifier delivers exceptional sound characteristics that will impress even the most discerning audiophiles. With its advanced technology and precision engineering, this amplifier offers a truly immersive audio experience.

One of the standout features of the DIA-400 is its ability to reproduce intricate details in the music. Whether you’re listening to classical orchestral pieces or modern electronic tracks, this amplifier ensures that every instrument and nuance is reproduced with stunning clarity. The instrument separation is remarkable, allowing each element of the music to be heard distinctly, creating a lifelike and engaging listening experience.

The bass response of the DIA-400 is powerful and tight, adding depth and impact to the music. It effortlessly handles low-frequency notes, providing a solid foundation for any genre. Whether it’s the thumping basslines of hip-hop or the rumbling drums of rock music, this amplifier delivers a punchy and controlled bass performance.

On the other end of the frequency spectrum, the treble clarity of the DIA-400 is exceptional. The high frequencies are crisp and well-defined, adding sparkle and airiness to the soundstage. The amplifier ensures that even the subtlest details in the upper register are reproduced accurately, enhancing the overall musical experience.

When it comes to different music genres, the DIA-400 excels in adapting to various styles. It effortlessly handles the complexity of classical compositions, capturing every delicate note and dynamic range with finesse. For jazz enthusiasts, this amplifier brings out the warmth and richness of brass instruments while maintaining excellent instrument separation. Rock and pop music lovers will appreciate the amplifier’s ability to deliver impactful and energetic performances with its powerful bass response.

Overall, the sound characteristics of the Gato Audio DIA-400 amplifier are nothing short of impressive. Its attention to detail, instrument separation, powerful bass response, treble clarity, and versatility across music genres make it a top choice for audiophiles seeking a captivating and immersive listening experience.

Sound Performance

The Gato Audio DIA-400 amplifier delivers an exceptional sound performance that is sure to captivate even the most discerning audiophiles. With its advanced technology and precise engineering, this amplifier is able to faithfully reproduce audio signals with remarkable clarity and accuracy.

One of the standout qualities of the DIA-400 is its ability to maintain a balanced and natural sound across the entire frequency range. The lows are deep and well-defined, providing a solid foundation to the music. The midrange is rich and detailed, allowing for the nuances and subtleties of vocals and instruments to shine through. The highs are crisp and extended, adding a sense of air and sparkle to the overall sound.

The dynamics of the DIA-400 are truly impressive. It effortlessly handles both delicate passages and explosive crescendos with finesse and control. The amplifier is able to convey the full range of emotions in the music, ensuring an engaging and immersive listening experience.

Furthermore, the tonal balance of the DIA-400 is impeccable. There is a sense of neutrality and accuracy in its presentation, allowing each instrument to occupy its rightful place within the soundstage. The separation between instruments is outstanding, creating a three-dimensional soundstage that is both wide and deep.

Whether you’re listening to classical symphonies, jazz ensembles, or rock anthems, the DIA-400 ensures that every note and every instrument is reproduced with utmost precision and realism. It brings out the subtle details in recordings, allowing you to rediscover your favorite tracks with a newfound appreciation.

In conclusion, the sound performance of the Gato Audio DIA-400 amplifier is nothing short of exceptional. Its ability to faithfully reproduce audio signals with clarity, dynamics, and tonal balance sets it apart from its competitors. Whether you’re a casual listener or a dedicated audiophile, this amplifier will elevate your listening experience to new heights.


The Gato Audio DIA-400 amplifier boasts several advantages that set it apart from its competitors in the market. Firstly, its combination of various technologies, power, musicality, versatility, and compact size make it a standout choice for audio enthusiasts.

In terms of power, the DIA-400 offers a substantial 1600 watts of power consumption, ensuring a robust and dynamic sound performance. Additionally, its advanced Class-D output stages with separate power supplies deliver superior audio quality with minimal loss.

Compared to other models in the same price range, the DIA-400 stands out due to its integrated Digital-to-Analog Converter (DAC) capabilities. With a dedicated power supply and the inclusion of a Burr-Brown PCM1794 chip with balanced output, this amplifier achieves true high-end characteristics. The DAC also features an improved current-to-voltage converter with an extended frequency range and a low-Quality Factor (Q) analog section. This allows for enhanced detail and musicality when streaming audio through wired or wireless sources.

The DIA-400 also excels in terms of versatility and connectivity options. It offers a wide selection of digital and analog inputs, as well as linear outputs, a trigger for external power amplifiers, and a configurable input for home theater use. Its ability to transform into a power amplifier with fixed gain levels for uncompromising surround sound systems further enhances its versatility.

Overall, the Gato Audio DIA-400 amplifier stands out with its powerful performance, advanced DAC capabilities, and extensive connectivity options. Its advantages over competitors lie in its ability to deliver high-quality audio reproduction while offering versatility and flexibility for different setups. When compared to other models in its price range, the DIA-400’s integrated DAC and comprehensive connectivity options make it an excellent value for money option for discerning audiophiles.

Value for Money

The Gato Audio DIA-400 amplifier offers exceptional value for money, combining high performance, advanced features, and an attractive price point. With its powerful output of 800 watts per channel at 4 ohms and 400 watts per channel at 8 ohms, this amplifier delivers impressive audio performance that rivals more expensive options on the market.

In terms of features, the DIA-400 boasts a comprehensive range of inputs, including one USB, one coaxial audio input, one optical audio input, one XLR analog input, and two RCA line inputs. This versatility allows users to connect a variety of audio sources and enjoy their music in different formats.

Additionally, the built-in digital-to-analog converter (DAC) enhances the amplifier’s value proposition by providing high-end audio capabilities. With a resolution of 24 bits and a sampling rate of up to 192 kHz, the DAC ensures accurate and detailed sound reproduction.

The DIA-400’s sleek design and solid construction further contribute to its value. The compact size and elegant black finish make it a visually appealing addition to any audio setup. Moreover, the amplifier’s durable build quality ensures long-lasting performance and reliability.

Considering its impressive specifications, versatile functionality, and competitive price point compared to other amplifiers in its class, the Gato Audio DIA-400 provides excellent value for money. Whether you are an audiophile seeking uncompromising sound quality or a music enthusiast looking for a versatile amplifier that won’t break the bank, the DIA-400 is a compelling choice.

In conclusion, the Gato Audio DIA-400 amplifier offers exceptional value for money with its powerful performance, advanced features including a built-in DAC, versatile connectivity options, and attractive price point. It is a worthwhile investment for anyone seeking high-quality audio reproduction without compromising on budget constraints.


In conclusion, the Gato Audio DIA-400 amplifier is a remarkable piece of audio equipment that delivers exceptional performance and versatility. Its combination of advanced technologies, power, musicality, and compact size make it a standout choice for any audio enthusiast.

The amplifier’s Class-D circuitry with a separate power supply ensures efficient and precise switching, resulting in a smooth and detailed analog sound. The use of high-quality components such as MOS-FET transistors and low-resistance output filters further enhances the audio performance, delivering a rich and immersive listening experience.

The integrated digital-to-analog converter (DAC) elevates the DIA-400 to true high-end standards. With features like a dedicated power supply, the Burr-Brown PCM1794 chip with balanced output, and an improved current-to-voltage converter, this amplifier can enhance the detail and musicality of any digital source. Additionally, the ability to increase the sampling rate up to 24bit/192kHz ensures compatibility with various digital inputs.

The DIA-400 offers not only a wide range of digital and analog inputs but also convenient features like linear outputs, a trigger for external power amplifiers, and a configurable input for home theater systems. This level of versatility and connectivity allows users to tailor their audio setup to their specific needs.

One of the standout advantages of the Gato Audio DIA-400 is its exceptional build quality and sleek design. The amplifier’s solid construction ensures longevity and durability while adding an elegant touch to any audio setup. Furthermore, its compact size makes it suitable for both small spaces and larger installations.

Considering its impressive specifications, outstanding sound characteristics, and versatile functionality, the Gato Audio DIA-400 offers excellent value for money. While it may be positioned at a higher price point compared to some competitors, its performance justifies the investment for audiophiles who seek uncompromising audio quality.

In conclusion, the Gato Audio DIA-400 amplifier is a top-tier choice for those who prioritize exceptional sound performance, versatility, and aesthetic appeal. Whether you are an avid music listener or a dedicated audiophile, this amplifier will undoubtedly elevate your audio experience to new heights. I highly recommend the Gato Audio DIA-400 to anyone seeking a high-quality amplifier that delivers on all fronts.

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