NAD C390DD: Unleashing the True Potential of Your Audio Experience


In today’s world, where music and audio play a significant role in our lives, having a high-quality sound amplifier is essential to fully experience the richness and depth of sound. Whether you are an avid music lover, a movie enthusiast, or a professional audio engineer, the right amplifier can make all the difference in delivering an immersive and captivating audio experience.

In this review, we will be exploring the NAD C390DD amplifier. This hifi sound amplifier offers a unique and innovative approach to sound amplification with its Direct Digital concept. Unlike traditional amplifiers, the NAD C390DD does not rely on analog circuits. Instead, it processes the signal entirely in the digital domain. This cutting-edge technology ensures precise signal reproduction and exceptional audio quality.

Throughout this review, we will delve into the technical specifications, design and construction, functionality, sound characteristics, and performance of the NAD C390DD amplifier. We will also discuss its advantages, value for money, and provide a comprehensive conclusion based on our evaluation.

Join us as we explore the world of high-fidelity sound amplification through the lens of the NAD C390DD amplifier. Let’s discover how this amplifier can elevate your audio experience to new heights and exceed your expectations in terms of performance and quality.

Technical Specifications

The NAD C390DD amplifier is a digital amplifier that offers impressive technical specifications for high-quality audio performance. With a power output of 150 watts per channel at 8 ohms, this amplifier delivers ample power to drive a variety of speakers and create a dynamic listening experience.

In terms of sound quality, the NAD C390DD boasts a signal-to-noise ratio (SNR) of 95 dB, ensuring minimal background noise and a clean audio signal. Additionally, the total harmonic distortion (THD) is kept at low levels, guaranteeing accurate and faithful reproduction of the original audio source.

The amplifier features multiple inputs and outputs to accommodate various audio devices. It includes two USB ports for connecting compatible devices, two coaxial and two optical audio inputs for digital sources, and one balanced input for enhanced audio quality. The amplifier also offers stereo preamp outputs, one coaxial audio output, and one optical audio output.

With regards to compatibility, the NAD C390DD supports various audio formats, allowing you to enjoy your music in different formats. Whether you prefer streaming from your computer via the built-in USB port or connecting analog devices using optional MDC or HDMI modules, this amplifier provides flexibility in audio source selection.

The frequency response of the NAD C390DD ranges from 20Hz to 20kHz, ensuring accurate reproduction across the entire audible spectrum. The amplifier is designed to work with speakers ranging from 2 ohms to 8 ohms impedance, providing versatility in speaker selection.

Overall, the NAD C390DD’s technical specifications showcase its capability to deliver powerful and precise sound reproduction while offering a range of connectivity options for various audio sources.

Design and Construction

The NAD C390DD amplifier boasts a sleek and modern design that is sure to catch the eye of any audiophile. Its black color adds a touch of elegance to any audio setup. The amplifier is compact, with dimensions of 131mm in height, 435mm in width, and 388mm in depth, making it easy to fit into any space.

In terms of construction, the NAD C390DD is built with high-quality materials that ensure durability and longevity. The sturdy chassis provides excellent protection for the internal components, ensuring optimal performance over time. The amplifier also features well-designed ventilation systems that contribute to efficient cooling, preventing overheating during extended listening sessions.

The connectors and switches on the NAD C390DD are of exceptional quality. They are solidly built and provide a secure connection for various audio devices. The presence of two USB ports allows for convenient connectivity options, while the two coaxial and optical audio inputs offer flexibility when connecting different sources. Additionally, the balanced input provides improved signal integrity and reduced interference.

Overall, the design and construction of the NAD C390DD amplifier are top-notch. Its sleek appearance, high-quality materials, efficient cooling system, and reliable connectors make it a standout choice in terms of both aesthetics and functionality.


The NAD C390DD 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. The amplifier features multiple USB ports, coaxial and optical audio inputs, and even a dedicated balance input. This means that you can easily integrate your digital music library or enjoy high-quality sound from your favorite analog devices.

In addition to its connectivity options, the NAD C390DD amplifier also offers several operating modes and controls to enhance your listening experience. It includes balance controls that allow you to adjust the sound distribution between the left and right channels for optimal stereo imaging. The amplifier also provides tone adjustments, enabling you to fine-tune the bass, midrange, and treble frequencies according to your preferences.

Furthermore, the NAD C390DD amplifier supports the use of MDC (Modular Design Construction) modules, which allow for future upgrades and customization. This means that as technology advances or new features become available, you can easily update your amplifier without having to replace the entire unit.

Overall, the functionality of the NAD C390DD amplifier is impressive. Its diverse connectivity options ensure compatibility with various audio sources, while its balance controls and tone adjustments provide flexibility in tailoring the sound to suit individual preferences. With the added benefit of MDC modules, this amplifier offers a level of versatility that is hard to match in its price range.

Sound Characteristics

The NAD C390DD amplifier delivers exceptional sound characteristics that will impress even the most discerning audiophiles. With its innovative Direct Digital concept, this amplifier eliminates analog circuits, ensuring that all signal operations occur in a digital format.

When it comes to sound quality, the NAD C390DD truly shines. The amplifier offers a remarkable level of detail and clarity, allowing you to hear every nuance and subtlety in your music. Instrument separation is excellent, creating a spacious and immersive listening experience. Each instrument is precisely positioned within the soundstage, enabling you to appreciate the individual elements of a composition.

The bass response of the NAD C390DD is energetic and impactful. It adds depth and weight to the music without overpowering other frequencies. Whether you’re listening to electronic beats or deep basslines in rock or jazz, this amplifier reproduces low frequencies with precision and control.

In terms of treble clarity, the NAD C390DD excels. High-frequency sounds are rendered with incredible detail and transparency. The amplifier ensures that delicate cymbal crashes, soaring vocals, and intricate guitar solos are reproduced with utmost accuracy and sparkle.

One of the standout features of the NAD C390DD is its ability to enhance different music genres. Whether you’re a fan of classical orchestral compositions or prefer the punchy beats of hip-hop and electronic music, this amplifier adapts seamlessly to any genre. It faithfully reproduces the tonal balance and dynamics specific to each style, allowing you to fully immerse yourself in your favorite music.

Overall, the sound characteristics of the NAD C390DD are nothing short of exceptional. Its attention to detail, precise instrument separation, powerful bass response, clear treble presentation, and versatility across various music genres make it an outstanding choice for audiophiles who demand nothing but the best from their audio equipment.

Sound Performance

The NAD C390DD amplifier delivers an exceptional sound performance that will captivate even the most discerning audiophiles. Its ability to faithfully reproduce audio signals is truly remarkable, providing a listening experience that is rich, dynamic, and immersive.

When it comes to clarity, the NAD C390DD excels in bringing out the finest details in the music. Every instrument and vocal is rendered with precision and accuracy, allowing you to hear subtle nuances that may have been previously hidden. The level of clarity is truly impressive, making each note come alive with incredible realism.

The dynamics of the NAD C390DD are equally impressive. It effortlessly handles both soft and loud passages, ensuring that no detail gets lost in the mix. The amplifier’s ability to deliver impactful and controlled bass adds depth and power to your music, while maintaining a tight grip on the low frequencies.

Tonal balance is another area where the NAD C390DD shines. It strikes a perfect balance between warmth and neutrality, ensuring that no frequency range overpowers or dominates the others. The midrange is particularly smooth and natural, allowing vocals to shine through with exceptional clarity and presence. The highs are crisp and detailed without ever becoming harsh or fatiguing.

Whether you’re listening to classical music with its delicate orchestral arrangements or enjoying the energy of rock or electronic genres, the NAD C390DD excels in reproducing each genre with finesse. It effortlessly handles complex musical passages with ease, creating a cohesive and engaging soundstage that draws you into the heart of the music.

In summary, the sound performance of the NAD C390DD is nothing short of outstanding. Its ability to faithfully reproduce audio signals with clarity, dynamics, and tonal balance across different frequency ranges makes it a standout amplifier in its class. Regardless of your musical preferences, this amplifier will provide an immersive listening experience that will leave you wanting more.


The NAD C390DD amplifier offers several significant advantages that set it apart from its competitors in the market. Firstly, its unique Direct Digital concept eliminates analog circuitry, ensuring that all signal processing is done in the digital domain. This results in improved accuracy and precision in audio reproduction.

Additionally, the amplifier features a range of connectivity options, including four outputs and a USB port. It also provides the flexibility to connect analog devices through interchangeable MDC modules or an HDMI terminal. The inclusion of optical and coaxial connections further enhances the playback accuracy, delivering more energetic bass and clearer highs.

One notable advantage of the NAD C390DD is its versatility in working with various music sources and formats. It allows for seamless connection to computers through a dedicated port, expanding its usability beyond traditional audio sources.

In terms of comparison with other models in the same price range, the NAD C390DD stands out due to its advanced digital technology and superior sound quality. While some competitors may offer similar features, the Direct Digital concept and precise signal processing give this amplifier an edge in terms of overall performance.

Furthermore, the NAD C390DD offers a power output of 150 watts per channel at 8 ohms, ensuring ample power for driving speakers and delivering immersive audio experiences. Its built-in DAC further enhances the sound quality by providing high-quality digital-to-analog conversion.

Overall, the NAD C390DD amplifier’s advantages lie in its innovative Direct Digital design, extensive connectivity options, versatility in music playback, and superior sound performance compared to other models in its price range. Its combination of advanced technology and exceptional audio quality makes it a compelling choice for audiophiles seeking a high-end amplifier.

Value for Money

The NAD C390DD amplifier offers exceptional value for money with its impressive performance, extensive features, and competitive price point. When considering its performance, the amplifier delivers powerful and clean sound reproduction, thanks to its Direct Digital concept and absence of analog circuits. This digital processing ensures accurate signal reproduction and enhances the overall audio experience.

In terms of features, the NAD C390DD provides a range of connectivity options, including four outputs and a USB port. It also offers the flexibility to connect analog devices through the MDC module or HDMI terminal. The inclusion of optical and coaxial inputs further improves playback accuracy, resulting in energetic bass and clear trebles.

Moreover, the amplifier’s compatibility with various music sources and formats adds to its value. The ability to connect to a computer via the built-in connector expands its functionality, allowing users to enjoy their digital music collection effortlessly.

Considering the price point, the NAD C390DD offers a compelling proposition. It provides high-quality audio performance comparable to more expensive amplifiers on the market. With its robust construction and reliable components, this amplifier is built to last, ensuring long-term value for your investment.

Overall, the NAD C390DD amplifier combines exceptional performance, versatile features, and an attractive price point. Its value for money is evident in its ability to deliver superior audio quality, provide various connectivity options, and offer long-term reliability. Whether you are an audiophile seeking high-fidelity sound or a music enthusiast looking for a versatile amplifier, the NAD C390DD is an excellent choice that offers great value for your money.


In conclusion, the NAD C390DD amplifier is a powerful and versatile audio device that offers exceptional performance and functionality. Its unique Direct Digital concept eliminates analog circuits, ensuring a pure and accurate signal reproduction. The amplifier’s design and construction are solid, with a sleek black finish that adds a touch of elegance to any audio setup.

With its multiple inputs and outputs, including USB, coaxial, and optical connections, the NAD C390DD allows for seamless integration with various audio sources. The option to add interchangeable modules or an HDMI terminal further enhances its versatility. Additionally, the inclusion of a built-in digital-to-analog converter (DAC) provides high-quality sound reproduction.

The sound characteristics of the NAD C390DD are impressive, with improved bass energy and enhanced clarity in the treble range. Whether you’re listening to music or watching movies, this amplifier delivers a dynamic and immersive audio experience.

In terms of sound performance, the NAD C390DD excels in delivering clear and detailed sound reproduction across all frequencies. The signal-to-noise ratio of 95 dB ensures minimal distortion and a clean audio output.

One of the major advantages of the NAD C390DD is its ability to connect to various devices, including computers via USB. This feature allows for easy access to digital music libraries and opens up a world of possibilities for music enthusiasts.

While the NAD C390DD may not have features like internet radio or wireless connectivity options like Wi-Fi or Bluetooth, it compensates with its exceptional audio performance. It is ideal for audiophiles who prioritize sound quality above all else.

Considering its technical specifications, design, functionality, and sound performance, the NAD C390DD offers excellent value for money. It is a reliable and high-performing amplifier that will elevate your audio experience to new heights.

In conclusion, if you are looking for a powerful and versatile amplifier that delivers exceptional sound quality without compromising on design and construction, the NAD C390DD is an excellent choice. Its Direct Digital concept, multiple connectivity options, and impressive sound characteristics make it a top contender in its price range. Whether you are a music lover or a movie enthusiast, this amplifier will exceed your expectations and provide an immersive audio experience.

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