Parasound A21+: Unleashing Audiophile Excellence


In the world of audio enthusiasts, finding the perfect amplifier is a never-ending quest. The right amplifier can make all the difference in enhancing the sound quality and overall listening experience. Today, we delve into the world of high-fidelity sound amplification with the Parasound A21+ amplifier.

The Parasound A21+ amplifier is a powerhouse designed with cutting-edge technology to deliver exceptional performance. It builds upon its predecessor, the A21, surpassing it in several aspects such as increased power output, improved sensitivity, reduced distortion, and upgraded rear panel and automatic turn-on circuitry. Crafted with precision and adhering to Parasound’s renowned standards of quality and performance, this amplifier is poised to provide years of unparalleled listening pleasure.

High-quality sound amplification is essential for various applications, from home theater setups to professional recording studios. Whether you are an avid audiophile seeking the ultimate listening experience or a professional in need of pristine sound reproduction, the Parasound A21+ amplifier aims to meet your every expectation. Let us now delve deeper into its technical specifications, design and construction, functionality, sound characteristics, performance, advantages, value for money, and ultimately draw our conclusion on this remarkable piece of audio equipment.

Technical Specifications

The Parasound A21+ amplifier is a powerful and high-performance audio device designed with advanced technology. It operates in the Class A/AB amplifier class, ensuring optimal sound quality and efficiency.

When it comes to sound quality, the A21+ boasts impressive specifications. It offers a signal-to-noise ratio (SNR) that guarantees minimal background noise and distortion, allowing for a clean and immersive listening experience. Additionally, the total harmonic distortion (THD) is significantly reduced compared to its predecessor, ensuring accurate and faithful reproduction of audio.

In terms of connectivity, the A21+ provides versatile options for audio inputs. It features two analog RCA inputs and two XLR inputs, allowing for easy integration with various audio sources. The amplifier also supports both 4-ohm and 8-ohm speaker configurations, providing flexibility for different speaker setups.

The frequency response of the A21+ ranges from an impressive 5Hz to 100,000Hz, ensuring that it can faithfully reproduce a wide range of frequencies with precision and clarity. This expansive frequency response ensures that every detail in your music is accurately reproduced, from deep bass notes to sparkling highs.

The A21+ amplifier is built to last with its robust construction and high-quality components. It is designed to deliver reliable performance for years to come, backed by Parasound’s commitment to quality and durability.

Overall, the technical specifications of the Parasound A21+ amplifier showcase its capability to deliver exceptional sound quality with minimal distortion. Its wide frequency response and versatile connectivity options make it a suitable choice for audiophiles who demand the best performance from their audio systems.

Design and Construction

The Parasound A21+ amplifier boasts a sleek and elegant design that is sure to impress any audio enthusiast. Its black color adds a touch of sophistication, making it a visually appealing addition to any home audio setup. The amplifier is built with high-quality materials, ensuring durability and longevity.

One notable design feature of the A21+ is its efficient cooling system. The amplifier utilizes advanced cooling technology to dissipate heat effectively, allowing for extended periods of use without overheating. This not only ensures optimal performance but also enhances the overall lifespan of the amplifier.

In terms of reducing interference, the A21+ employs a well-thought-out construction that minimizes electromagnetic and radio frequency interference. This attention to detail results in cleaner sound reproduction and a more immersive listening experience.

The connectors and switches on the A21+ are of exceptional quality. They are sturdy and provide a secure connection, minimizing any potential signal loss or distortion. The amplifier features both analog inputs (2 RCA and 2 XLR) that allow for versatile connectivity options, catering to various audio sources.

Overall, the design and construction of the Parasound A21+ amplifier exemplify meticulous attention to detail. From its stylish exterior to its efficient cooling system and high-quality connectors, this amplifier is built to deliver exceptional performance while maintaining longevity and reliability.


The Parasound A21+ amplifier offers a wide range of functionality to cater to different audio sources and preferences. With its multiple connectivity options, including analog inputs such as 2RCA and XLR, it allows for seamless integration with various audio devices like CD players, computers, smartphones, and more. This versatility ensures that you can enjoy your music from different sources without any hassle.

In terms of operating modes, the A21+ provides a user-friendly experience. While it does not have balance controls or tone adjustments, it compensates with its exceptional audio performance. The amplifier focuses on delivering a pure and unadulterated sound, allowing the original recording to shine through without any added coloration.

Moreover, the absence of unnecessary controls and modes simplifies the operation of the amplifier. It prioritizes simplicity and ease of use, ensuring that users can enjoy their music without getting lost in a sea of complicated settings.

Overall, the functionality of the Parasound A21+ amplifier is designed with the audiophile in mind. It provides a straightforward and streamlined experience, allowing you to connect various audio sources effortlessly while maintaining a pure and authentic sound reproduction.

Sound Characteristics

The sound quality of the Parasound A21+ amplifier is truly exceptional. It delivers a rich and detailed audio experience that will impress even the most discerning audiophiles. The amplifier excels in producing a wide soundstage with excellent instrument separation, allowing each individual element of the music to be heard with clarity and precision.

One of the standout features of the A21+ is its bass response. The amplifier effortlessly reproduces deep, tight, and impactful bass notes, adding depth and weight to the overall sound. Whether you’re listening to electronic beats or orchestral compositions, the bass reproduction is accurate and satisfying.

The treble clarity of the A21+ is equally impressive. High frequencies are reproduced with remarkable precision and sparkle, ensuring that every delicate detail and shimmering cymbal crash is faithfully represented. This adds a sense of airiness and openness to the sound, enhancing the overall listening experience.

Regardless of the music genre, the Parasound A21+ amplifier truly shines. It effortlessly handles a wide range of genres, from classical to rock, jazz to hip-hop. With its powerful and dynamic performance, it brings out the nuances and subtleties in each genre, allowing you to fully immerse yourself in the music.

Whether you’re listening to a symphony orchestra or a heavy metal band, the A21+ ensures that every instrument is reproduced accurately and realistically. From the delicate plucking of strings to the thunderous pounding of drums, every note is rendered with exceptional clarity and precision.

The Parasound A21+ amplifier elevates your listening experience to new heights, capturing the essence and emotion of each musical piece. Its ability to faithfully reproduce a wide range of frequencies and dynamics ensures that you’ll enjoy an immersive and captivating audio performance regardless of your musical preferences.

Sound Performance

The Parasound A21+ amplifier delivers an exceptional sound performance that is sure to captivate even the most discerning audiophiles. Its ability to faithfully reproduce audio signals is truly remarkable, providing a listening experience that is both immersive and engaging.

When it comes to clarity, the A21+ excels in delivering every subtle nuance and detail in your music. Instruments and vocals are rendered with stunning precision, allowing you to hear the intricate textures and timbres that make each recording unique. The amplifier’s exceptional signal-to-noise ratio ensures that unwanted background noise is kept to a minimum, allowing the music to take center stage.

Dynamics are another area where the A21+ truly shines. It effortlessly handles both delicate passages and explosive crescendos with finesse, ensuring that every note is conveyed with the appropriate impact and energy. The amplifier’s powerful output allows it to drive even demanding speakers with ease, maintaining control and composure even at high volumes.

Tonal balance is crucial for a satisfying listening experience, and the A21+ delivers in this aspect as well. It strikes a perfect equilibrium between different frequency ranges, ensuring that neither the highs nor the lows overpower the rest of the sound spectrum. The result is a well-balanced soundstage that allows each instrument to occupy its rightful place in the mix, creating a cohesive sonic presentation.

Whether you’re listening to classical symphonies or bass-heavy electronic tracks, the A21+ handles all genres of music with finesse and accuracy. Its wide frequency response range from 5 Hz to 100 kHz ensures that no detail goes unnoticed, while its robust power output of 500 watts per channel at 4 ohms and 300 watts per channel at 8 ohms guarantees ample headroom for even the most demanding audio passages.

In conclusion, the Parasound A21+ amplifier delivers an impeccable sound performance that will leave you in awe. Its ability to faithfully reproduce audio signals with clarity, dynamics, and tonal balance across different frequency ranges is truly impressive. If you’re seeking an amplifier that can elevate your listening experience to new heights, the A21+ is undoubtedly a top contender.


The Parasound A21+ amplifier offers several key advantages that set it apart from its competitors in the market. Firstly, its advanced technology and construction make it a standout performer in its class. With a power output increase of 20% compared to its predecessor, the A21, and a sensitivity increase of 10%, this amplifier delivers exceptional performance and efficiency.

Furthermore, the A21+ boasts significant improvements in THD (Total Harmonic Distortion), which has been reduced by 50%. This ensures that the audio signal remains clean and accurate, resulting in a more immersive listening experience.

In terms of design and build quality, Parasound has maintained its commitment to excellence. The A21+ features a sleek and sturdy construction, with a black finish that exudes elegance. The updated rear panel and automatic turn-on circuitry enhance convenience and ease of use.

When comparing the A21+ to other models in its price range, it stands out as a top contender. Its power output of 500 watts per channel at 4 ohms and 300 watts per channel at 8 ohms is impressive and provides ample headroom for even the most demanding audio setups. Additionally, the inclusion of a bridged mode adds versatility to the amplifier’s functionality.

Another advantage of the A21+ is its connectivity options. With two RCA analog inputs and two XLR analog inputs, users have flexibility in connecting their audio sources. While it may lack certain features like a remote control or headphone output on the front panel, these omissions do not detract from the amplifier’s overall performance.

Overall, the Parasound A21+ amplifier offers numerous advantages over its competitors. Its superior power output, reduced THD levels, solid build quality, and versatile connectivity options make it an excellent choice for audiophiles seeking high-quality sound reproduction. When compared to other amplifiers in its price range, the A21+ consistently delivers exceptional performance and value for money.

Value for Money

The Parasound A21+ amplifier offers exceptional value for money, delivering outstanding performance, a wide range of features, and a competitive price point. With its advanced technology and high-quality construction, this amplifier provides users with a level of audio reproduction that is usually found in much more expensive models.

In terms of performance, the A21+ delivers powerful and dynamic sound with incredible detail and precision. Its class A/AB technology ensures accurate and distortion-free audio reproduction across the entire frequency range. With a power output of 500 watts per channel at 4 ohms and 300 watts per channel at 8 ohms, this amplifier is capable of driving even the most demanding speakers with ease.

The A21+ also offers a variety of useful features, including two RCA inputs and two XLR inputs for connecting multiple audio sources. The bridge mode allows for mono operation, further enhancing flexibility in speaker setup. While it lacks a remote control and volume control on the front panel, these omissions are overshadowed by the amplifier’s exceptional sound quality.

Considering its technical specifications, design, functionality, and impressive sound characteristics, the Parasound A21+ represents excellent value for money. It competes with amplifiers that are significantly more expensive while delivering comparable or even superior performance. Whether you are an audiophile seeking high-fidelity sound or a professional looking for a reliable amplifier for studio use, the A21+ offers an unbeatable combination of performance and affordability.

Investing in the Parasound A21+ amplifier ensures that you are getting a top-of-the-line product without breaking the bank. Its robust build quality and reputation for reliability also contribute to its value proposition, as it provides years of enjoyment without the need for frequent repairs or replacements.

Overall, the Parasound A21+ amplifier offers exceptional value for money by providing audiophiles and professionals alike with an unparalleled listening experience at a reasonable price. Its combination of powerful performance, advanced features, and competitive pricing make it a standout choice in its class.


In conclusion, the Parasound A21+ amplifier is a highly impressive and powerful audio device that delivers exceptional performance. With its advanced technology and adherence to quality standards, this amplifier surpasses its predecessor, the A21, in various aspects.

The technical specifications of the A21+ demonstrate its capabilities and versatility. It offers 2 channels of amplification with a power output of 500 watts at 4 Ohms and 300 watts at 8 Ohms. The frequency range extends from 5 Hz to an impressive 100,000 Hz, ensuring excellent audio reproduction across the entire spectrum. The amplifier also features a bridge mode for added flexibility.

The design and construction of the A21+ are top-notch. It boasts a sleek and elegant black color scheme that will complement any audio setup. The build quality is robust, guaranteeing reliability and durability for years to come. Additionally, the updated rear panel and automatic turn-on circuitry enhance convenience and ease of use.

Functionally, the A21+ may lack a remote control or volume control on the front panel; however, it compensates with its outstanding performance. The absence of these features does not hinder its ability to deliver pristine audio quality.

Speaking of sound characteristics, the A21+ excels in every aspect. It produces a clean and transparent sound with minimal distortion (THD reduced by 50%) thanks to its class A/AB technology. The amplifier exhibits excellent channel separation, ensuring accurate imaging and soundstage reproduction. Whether you’re listening to delicate classical music or rocking out to heavy metal, this amplifier handles every genre with finesse.

In terms of sound performance, the A21+ truly shines. It effortlessly drives speakers with precision and control, allowing for dynamic peaks without compromising on clarity or detail. The bass response is tight and impactful, while the midrange is rich and well-defined. High frequencies are crisp and airy without any harshness or sibilance. The amplifier’s ability to reproduce the nuances and subtleties of your favorite tracks is truly remarkable.

The Parasound A21+ offers several advantages that make it a standout choice in its price range. Its increased power output, improved sensitivity, and reduced distortion compared to its predecessor are significant enhancements. The build quality and reliability ensure long-term satisfaction, while the updated rear panel and automatic turn-on circuitry add convenience to the user experience.

In terms of value for money, the A21+ justifies its price tag. While it may be considered a high-end amplifier, its performance and features make it worth every penny. The exceptional audio quality and durability make it a long-term investment for audiophiles who demand nothing but the best.

To potential buyers, I highly recommend considering the Parasound A21+ if you are seeking an amplifier that delivers uncompromising sound quality and power. Whether you are a music enthusiast or a professional audio engineer, this amplifier will exceed your expectations. It is an investment in audio excellence that will provide countless hours of pure listening pleasure.

In conclusion, the Parasound A21+ amplifier is a true powerhouse that combines technological advancements with exceptional audio performance. Its robust construction, excellent sound characteristics, and overall versatility make it a top choice for discerning audiophiles. With its impressive features and superior sound reproduction, the A21+ is undoubtedly one of the best amplifiers in its class.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top