Introducing the V3 Mono, the mini monoblock power amplifier for home audio system.

The V3 Mono is a mighty home audio power amplifier crafted by Fosi Audio for global audiophiles. With its high output power and outstanding performance, it effortlessly drives 2-8Ω home audio HiFi passive speakers. It’s ideal for integration with an AVR to build a powerful home theater system, and also perfect for setting up a bookshelf or near-field desktop sound system, immersing you in the high-fidelity audio world!

In 2023, following the launch of the V3 stereo amplifier, we received numerous valuable suggestions and feedback from our users.

We listen intently, record diligently, and develop with dedication, ultimately striving to transform your suggestions and ideas into reality—the V3 mono. 

PFFB Post-Filter Feedback Technology 

Significantly reduces distortion, enhances linearity and frequency response, and improves sound purity and system efficiency.

Reproducing  Every Detail

Effectively reduces the output impedance, thereby increasing the damping factor for tighter and more precise speaker response.

Overcoming the Pain Point of Class-D Amps

Reduces output filter impact, boosts frequency response for balanced, natural tones, ensuring true reproduction.

240W @ 4Ω Mono Rated Power Output 

Crafts an enriching, immersive sound experience, satisfying your craving for superior musical quality with unmatched audio richness.

Pure Sound, Accurate Imaging with Zero Crosstalk

Enhances stereo depth and soundstage accuracy through precise power and channel separation for a purer audio experience.

Compact and Exquisite with Minimalist Design

Effortlessly integrates into various settings like home theater, study room, desktop and studios without occupying too much space.

All-Aluminum Alloy Chassis: Sturdy and Durable

Durably built from a single CNC-machined aluminum alloy piece, showcasing a robust and refined high-quality design.

Supports XLR Balanced and  RCA Inputs: Easily Switchable with a Toggle

Provides you with flexible connectivity options that are easily adapted for both home and professional scenarios.

XLR Balanced Input Enhanced Interference Resistance

Ensures stable audio transmission for a precise, clear listening experience, fulfilling the quest for supreme sound quality.

RCA Input  with 25dB and 31dB Gain Selection

Enhances source adaptability and audio clarity, reducing distortion and overload risk, suitable for various audio setups.

Swappable Op-Amp Design

Easily replaceable DIP8 dual discrete op-amps, meeting your pursuit of a personalized audio experience.

Four-Layer PCB Design for Superior Sound Quality

Boosts signal stability and audio purity, enhancing performance and interference resistance for superior sound output.

Auto Standby Mode High Energy Efficiency

Automatically enters standby after 10 minutes of no signal input, extending device lifespan and reducing power consumption.

Advanced Cooling Design  

Guarantees long-term efficient operation of the amp, prevents overheating, and maintains consistent sound quality and device longevity.

Side Ventilation More Effective Cooling

Boosts heat dissipation efficiency for superior performance and stable sound quality, ensuring enhanced air circulation.

Dust-Proof Filter Screens Aesthetic and Practical 

Effectively blocks dust without compromising cooling, ensuring long-term stability and enhancing product durability.

Optional 48V/10A Power Supply  

Provides stable and robust power support, ensuring high-fidelity sound quality to meet diverse audio playback demands.

Powers Two V3 MONOs Simultaneously

With a power supply splitter cable, a single PSU can supply power to two amps, saving space and maintaining tidiness, offering you more flexible combination solutions.

We are thrilled to extend an exclusive invitation to you for Fosi Audio’s very first in-person exhibition at High End Munich! We want you, our valued backers, to be part of this milestone!

This exhibition is not just a showcase but an experience. As one of our backers, you’ll have the unique opportunity to interact with our upcoming products before they hit the market. We’ve prepared a hands-on experience where you can test the latest in audio technology, enjoy live demonstrations, and participate in Q&A sessions with our team.

Established in 2017, Fosi Audio has been committed to developing, manufacturing, and selling high-quality HiFi audio products worldwide. Our extensive lineup includes home audio amplifiers, preamps, DACs, headphone amplifiers, speakers, portable DAC amps, among others. Fosi Audio has quickly become a rising star in the HiFi audio world, earning recognition from audiophiles globally. We boast a distribution network that reaches over 100 countries and have sold an impressive 20 million audio products to date.

Guided by our mission of “Redefining HiFi with Unmatched Value”, Fosi Audio continues to fuel its passion for the HiFi industry, ramp up R&D efforts, and collaborate with users to make new HiFi equipment. We firmly believe that products co-created with our users possess unmatched value.

We pledge to bring more amazing HiFi gear with high value for the price, innovative design, cutting-edge technology, and premium quality, all backed by a 24-month warranty, to audiophiles worldwide. We ensure that every user experiences an unprecedented audio journey. We sincerely invite you to join us and immerse yourself in a distinctive world of audio.