Onkyo A-9377: Unleashing the Power of Hi-Fi Amplification


The world of audio enthusiasts and music lovers is constantly seeking the perfect sound experience. And at the heart of that quest lies the amplifier, a crucial component that can make or break the quality of our audio playback. Today, we delve into the realm of high-fidelity sound amplification with the Onkyo A-9377 amplifier.

Onkyo has long been synonymous with delivering exceptional results in the world of hi-fi components, and their expertise shines through in the design and performance of the A-9377. This integrated amplifier boasts a remarkable power output of 90 watts per channel, ensuring a pure and immersive musical experience. By combining the benefits of a preamplifier and power amplifier in a single unit, it not only saves space but also delivers audiophile-grade sound quality.

In this review, we will explore the technical specifications, design, functionality, sound characteristics, and performance of the Onkyo A-9377 amplifier. We will also discuss its advantages, value for money, and ultimately provide a comprehensive conclusion on whether this amplifier lives up to its reputation as a top-tier audio component.

Join us as we embark on this sonic journey with the Onkyo A-9377 amplifier, where every note comes to life with pristine clarity and depth.

Technical Specifications

The Onkyo A-9377 amplifier offers impressive technical specifications that contribute to its exceptional audio performance. With a power output of 90 watts per channel, this stereo amplifier delivers a robust and dynamic sound experience.

In terms of class, the A-9377 utilizes a combination of preamplifier and power amplifier in one chassis, providing the benefits of both while saving space in your setup. This integration ensures high-quality amplification with minimal distortion and interference.

The signal-to-noise ratio (SNR) of 96 dB guarantees clear and detailed audio reproduction, allowing you to enjoy your music without any unwanted background noise or hiss. The total harmonic distortion (THD) is rated at 0.08%, ensuring accurate sound reproduction with minimal distortion.

The amplifier features multiple inputs, allowing you to connect up to six components, including CD players, tuners, turntables, and even an optional iPod dock. This versatility enables you to create a comprehensive audio system tailored to your preferences.

In terms of outputs, the A-9377 provides a headphone output for private listening sessions. Additionally, it supports two pairs of speakers for multi-room setups or bi-wiring configurations.

The frequency response ranges from 10 Hz to an impressive 70 kHz, ensuring faithful reproduction across the entire audible spectrum. This wide frequency response allows for enhanced clarity and detail in your music.

With its power rating of 90 watts into 4 ohms, the A-9377 can drive a variety of speakers with ease, providing ample volume levels and dynamic range.

Overall, the technical specifications of the Onkyo A-9377 amplifier highlight its capability to deliver powerful and precise audio performance across various audio formats and sources.

Design and Construction

The Onkyo A-9377 amplifier boasts a sleek and elegant design that is sure to catch the eye of any audio enthusiast. With its black color and compact dimensions, it can seamlessly blend into any home audio setup. The amplifier is constructed using high-quality materials, ensuring durability and longevity.

One notable design feature of the A-9377 is its efficient cooling system. The amplifier is equipped with strategically placed vents and heat sinks, allowing for optimal heat dissipation during extended use. This not only helps to maintain the amplifier’s performance but also prolongs its lifespan.

In terms of reducing interference, the A-9377 employs advanced shielding techniques to minimize electromagnetic interference and ensure a clean audio signal. This attention to detail in design contributes to a superior listening experience, free from unwanted noise or distortion.

The connectors and switches on the A-9377 are of exceptional quality. They are sturdy and provide a secure connection, minimizing the risk of signal loss or degradation. The layout of the connectors is well thought out, making it easy to connect various audio devices without any hassle.

Overall, the design and construction of the Onkyo A-9377 amplifier exemplify attention to detail and quality craftsmanship. It not only looks visually appealing but also incorporates features that enhance performance and reduce interference. The use of premium materials and robust connectors ensures reliability and longevity, making it a worthy addition to any audio setup.


The Onkyo A-9377 amplifier offers a wide range of functionality to cater to various audio sources. It features multiple connectivity options, allowing you to connect up to 6 different components, including CD players, tuners, turntables, and even an iPod (with the optional dock station). This versatility ensures that you can enjoy your music from various sources without any hassle.

In terms of controls, the amplifier provides a balance control feature, allowing you to adjust the balance between the left and right channels for a personalized listening experience. Additionally, it offers tone adjustments, enabling you to fine-tune the bass and treble levels according to your preferences. These controls give you the flexibility to customize the sound output based on your audio source and personal taste.

Furthermore, the Onkyo A-9377 amplifier includes a convenient Rec Selector knob. This feature allows you to record audio from one source while simultaneously listening to another through your speakers. This is particularly useful for those who enjoy recording music or podcasts while still being able to enjoy their favorite tunes.

Overall, the functionality of the Onkyo A-9377 amplifier is designed with convenience and versatility in mind. Its wide range of connectivity options and adjustable controls make it suitable for various audio sources and allow for a personalized listening experience. Whether you are connecting traditional audio components or modern devices like smartphones and computers, this amplifier has you covered.

Sound Characteristics

The Onkyo A-9377 amplifier offers exceptional sound characteristics that will impress even the most discerning audiophiles. With its advanced technology and careful engineering, this amplifier delivers a truly immersive and high-fidelity audio experience.

One notable aspect of the sound quality is the level of detail it provides. The amplifier has a remarkable ability to reproduce intricate nuances in music, allowing you to hear every subtle note and texture with clarity. Whether you are listening to a classical symphony or a rock ballad, the A-9377 ensures that no musical detail goes unnoticed.

The instrument separation is another highlight of this amplifier. It creates a wide and spacious soundstage, allowing each instrument to occupy its own distinct space within the audio landscape. This enhances the overall listening experience and makes it easier to identify individual instruments within complex musical arrangements.

When it comes to bass response, the A-9377 does not disappoint. It delivers deep and punchy bass that adds richness and impact to your favorite tracks. Whether you are enjoying bass-heavy electronic music or bass-driven genres like hip-hop or reggae, this amplifier reproduces low frequencies with precision and power.

The treble clarity of the A-9377 is also worth mentioning. It strikes an excellent balance between smoothness and detail, ensuring that high-frequency sounds are reproduced accurately without harshness or distortion. This allows for an enjoyable listening experience across various genres, from delicate acoustic melodies to energetic metal riffs.

Overall, the Onkyo A-9377 amplifier enhances the sound of various music genres by providing exceptional clarity, detail, and balance across the entire frequency range. Its ability to faithfully reproduce different musical elements ensures that you can fully immerse yourself in your favorite songs regardless of their genre or style.

Sound Performance

The sound performance of the Onkyo A-9377 amplifier is truly exceptional, delivering a listening experience that is both captivating and immersive. With its powerful 90 watts of pure music output per channel, this amplifier has the capability to fill any room with rich, detailed sound.

One of the standout qualities of the A-9377 is its ability to faithfully reproduce audio signals with remarkable clarity. Every note and nuance in your favorite tracks are brought to life with precision, allowing you to hear even the subtlest details in your music. The amplifier’s wide frequency response, ranging from 10 Hz to 70,000 Hz, ensures that no aspect of the audio spectrum is compromised, resulting in a well-balanced and natural sound reproduction.

The dynamics of the A-9377 are truly impressive. Whether you’re listening to soft melodies or explosive soundtracks, this amplifier effortlessly handles both ends of the dynamic range. The transitions between quiet and loud passages are seamless, maintaining a consistent level of energy and impact throughout your listening session.

Tonal balance is another area where the A-9377 excels. The amplifier ensures that each instrument and vocal is presented with accuracy and precision, creating a cohesive and harmonious soundstage. The bass is deep and controlled, adding depth and richness to your music without overpowering other frequencies. The midrange is warm and detailed, allowing vocals and instruments to shine through with clarity. The treble is crisp and articulate, providing sparkle and airiness to high-frequency elements.

Whether you’re enjoying classical symphonies, rock anthems, or jazz improvisations, the Onkyo A-9377 delivers an audio performance that will leave you thoroughly impressed. Its ability to faithfully reproduce audio signals with clarity, dynamics, and tonal balance across different frequency ranges sets it apart from other amplifiers in its class.

In conclusion, the sound performance of the Onkyo A-9377 is truly remarkable. It elevates your listening experience, bringing your favorite music to life with exceptional clarity, dynamics, and tonal balance. Whether you’re a casual listener or a dedicated audiophile, this amplifier will exceed your expectations and provide hours of pure musical enjoyment.


The Onkyo A-9377 amplifier offers several key advantages that set it apart from its competitors in the market.

Firstly, its powerful 90W of pure music output per channel ensures a dynamic and immersive listening experience. This level of power allows the amplifier to effortlessly drive even high-end speakers, delivering crisp and detailed audio across a wide frequency range.

Additionally, the A-9377 boasts a versatile range of connectivity options. With up to six input connections available, including support for CD players, tuners, turntables, and even an optional docking station for iPods, this amplifier caters to a variety of audio sources. The inclusion of a Rec Selector knob also allows for easy recording from one source while simultaneously enjoying audio playback from another.

Furthermore, the A-9377 incorporates Onkyo’s renowned Wide Range Amplification Technology (WRAT) and discrete component output stages. These advanced technologies ensure minimal distortion and interference, resulting in clean and accurate amplification of audio signals.

When compared to other models in its price range, the Onkyo A-9377 stands out due to its exceptional build quality and robust construction. Its anti-resonant chassis not only enhances durability but also helps reduce vibrations that can negatively impact audio performance.

Overall, the Onkyo A-9377 offers a combination of power, versatility, and high-quality sound reproduction that surpasses many competing amplifiers in its class. It is a reliable choice for audiophiles seeking an amplifier that delivers exceptional performance across various audio sources.

Value for Money

When considering the value for money aspect of the Onkyo A-9377 amplifier, it is important to evaluate its performance, features, and price. This amplifier offers a compelling value proposition for audio enthusiasts who seek high-quality sound reproduction without breaking the bank.

In terms of performance, the A-9377 delivers exceptional audio quality with its 90 watts of power per channel. The use of proprietary technologies such as the Wide Range Amplification Technology (WRAT) ensures minimal distortion and interference, resulting in clean and accurate sound reproduction. Whether you are listening to music or watching movies, this amplifier provides a truly immersive audio experience.

The A-9377 also boasts an impressive range of features. With six input options, including support for CD players, tuners, turntables, and even iPods (with an optional dock), this amplifier offers versatility and convenience. The inclusion of a Record Selector knob allows users to record from one source while simultaneously listening to another through the speakers. These features enhance the overall functionality of the amplifier and make it suitable for various audio setups.

Considering its price point, the Onkyo A-9377 offers excellent value for money. It provides a combination of performance, features, and build quality that is typically found in higher-priced amplifiers. The solid construction and attention to detail ensure durability and longevity, further enhancing its value proposition.

Overall, the Onkyo A-9377 amplifier represents a great investment for audiophiles who prioritize both audio performance and affordability. Its powerful output, versatile connectivity options, and solid build quality make it an attractive choice in its price range. Whether you are a casual listener or a dedicated music enthusiast, this amplifier delivers exceptional value for money.


In conclusion, the Onkyo A-9377 amplifier is an impressive piece of audio equipment that delivers exceptional performance and functionality. With its sleek design, solid construction, and a range of features, it is a worthy addition to any high-quality audio system.

The technical specifications of the Onkyo A-9377 are impressive, with a power output of 90W per channel and a wide frequency range from 10Hz to 70kHz. The signal-to-noise ratio of 96dB ensures clear and distortion-free audio reproduction. Additionally, the amplifier has a headphone output for private listening.

The design and construction of the Onkyo A-9377 are top-notch. The black color adds a touch of elegance, while the compact size allows for easy placement in any setup. The amplifier is built with an anti-resonant chassis and powered by a robust transformer, ensuring stable and reliable performance.

Functionally, the Onkyo A-9377 offers versatility with its multiple inputs, allowing users to connect up to six components such as CD players, tuners, turntables, and even an iPod via an optional dock. The Rec Selector feature enables recording from one source while listening to another through the speakers.

When it comes to sound characteristics, the A-9377 excels in delivering rich and detailed audio. The Wide Range Amplifier Technology (WRAT) and discrete output stages minimize distortion and interference, resulting in clean and dynamic sound reproduction across various genres of music.

In terms of sound performance, the Onkyo A-9377 truly shines. It provides a balanced and immersive listening experience with excellent clarity, depth, and accuracy. Whether you’re enjoying classical music or rocking out to your favorite band, this amplifier brings out the best in every note.

The advantages of the Onkyo A-9377 are numerous. Its powerful output ensures sufficient volume even in larger rooms, while its compact size saves space in your audio setup. The inclusion of a remote control adds convenience, allowing for easy operation from a distance.

Considering its features, performance, and build quality, the Onkyo A-9377 offers excellent value for money. It provides audiophile-grade sound reproduction at a reasonable price point, making it a worthwhile investment for music enthusiasts who appreciate high-quality audio.

In conclusion, the Onkyo A-9377 amplifier is a standout choice for those seeking exceptional audio performance in a compact and stylish package. Its impressive specifications, solid construction, versatile functionality, and superior sound characteristics make it an excellent addition to any discerning listener’s setup.

For potential buyers, I would highly recommend the Onkyo A-9377 if you prioritize audio quality and versatility. Whether you’re a casual listener or an avid audiophile, this amplifier delivers on its promises and will elevate your listening experience to new heights.

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