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  • 4 VIDEOS
  • Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp with TPA3255, 240W for HiFi Home Theater AVR Receiver Component, RCA/XLR Balanced Inputs with 48V/5A Power Supply
  • V3 MONO Instructional VideoFosi Audio

Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp with TPA3255, 240W for HiFi Home Theater AVR Receiver Component, RCA/XLR Balanced Inputs with 48V/5A Power Supply

4.3 out of 5 stars (259)

Sustainability features

This product has features recognized as more sustainable by certifying organizations.
Carbon impact
Carbon emissions from the lifecycle of this product were measured, reduced and offset.
As certified by
ClimatePartner certified

ClimatePartner certified

The ClimatePartner certified product label confirms that a product meets the requirements for the five steps in climate action including calculating carbon footprints, setting reduction targets, implementing reductions, financing climate projects and communicating transparently to continuously reducing emissions.

Certification number

ZK5TB8
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About this item

  • Mini Monoblock Amplifier: Crafted for HiFi audiophiles, the V3 Mono allows you to drive a single passive speaker with one amp, delivering up to 240W @4¦¸ of rated power. It offers the flexibility to build your home audio 2/3/4/5-channel system effortlessly. The V3 Mono can serve as a power amplifier for multi-channel AVRs, complementing the output power to easily drive high-power speakers in home theater systems
  • Innovative Cutting-Edge Technology: Fosi Audio has achieved a technological breakthrough through independent research and development by applying PFFB (Post-Filter Feedback) technology to the V3 Mono for the first time. This effectively overcomes the common load dependency issues of Class-D amplifiers, improving distortion and enhancing frequency response, thereby significantly enhancing sound quality and performance
  • Audiophile-Grade Components: The V3 Mono incorporates the high-end TPA3255 Class-D amp chip, paired with well-known components such as Japanese Nichicon filter capacitors, ELNA capacitors, German WIMA capacitors, and Japanese Sumida inductors, etc. Additionally, it features an upgraded four-layer PCB. This combination not only ensures high power output but also achieves a THD as low as 0.006%, a SINAD of 101dB, and an SNR of 123dB. As a result, the fidelity and quality of the audio are assured
  • Advanced Cooling: Utilizing Fosi Audio's pioneering full-body heat dissipation design, the TPA3255 amplifier chip is placed at the bottom and tightly integrated with the chassis, allowing heat to be effectively dissipated through the casing. Coupled with dual side ventilation holes that enhance internal airflow, this ensures the V3 Mono can deliver stable, high-power output over extended periods
  • User-Friendly Design: Supports both XLR/?" TRS balanced and RCA single-ended(with gain selection) inputs, with an easy toggle switch for selection. Additionally, it features an auto power/signal sensing mode to enhance energy efficiency. You can also customize your preferred sound signature by replacing the stock NE5532 op-amps, supporting DIP8 dual discrete op-amps. For example, it will work with Sparkos SS3602, MUSES02, OPA2604, Burson V5i, V6, V7, and more. Note: Please ensure that the device is powered off when connecting the speaker cable
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Sustainability features

This product has features recognized as more sustainable by certifying organizations.

Carbon impact

Carbon emissions from the lifecycle of this product were measured, reduced and offset.

As certified by
ClimatePartner certified

From the brand

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Product information

Technical Details

Manufacturer ‎Fosi Audio
Place of Business ‎Fosi Audio
Part number ‎un pezzo
Item Weight ‎750 g
Product Dimensions ‎14.5 x 10.78 x 4 cm; 750 g
Item model number ‎V3 Mono
Material ‎Metal
Voltage ‎230 Volts
Item Package Quantity ‎1
Mounting Type ‎Freestanding
Specifications ‎CE
Included components ‎Quick Start Guide
Batteries Included? ‎No
Batteries Required? ‎No
Length ‎14.5 Centimetres
Width ‎10.78 Centimetres
Height ‎4 Centimetres

Additional Information

ASIN B0D31M3DXY
Customer Reviews
4.3 out of 5 stars (259)

4.3 out of 5 stars
Â鶹Çø Rank
Date First Available July 10 2024

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Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp with TPA3255, 240W for HiFi Home Theater AVR Receiver Component, RCA/XLR Balanced Inputs with 48V/5A Power Supply

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Product details

  • Language ‏ : ‎ English
  • Product Dimensions ‏ : ‎ 14.5 x 10.78 x 4 cm; 750 g
  • Date First Available ‏ : ‎ July 10 2024
  • Manufacturer ‏ : ‎ Fosi Audio
  • Place of Business ‏ : ‎ Fosi Audio
  • ASIN ‏ : ‎ B0D31M3DXY
  • Item model number ‏ : ‎ V3 Mono
  • Country of origin ‏ : ‎ China
  • Â鶹Çø Rank: #13,977 in Electronics (See Top 100 in Electronics)
  • Customer Reviews:
    4.3 out of 5 stars (259)

Product Description

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

V3 Mono Power Amplifier for Home Audio Speakers

Merchant video
Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers
Continuation of Co-Creation

Engineered for Audiophiles - Optimal Choice for Home Audio Systems

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

  • Input: RCA, XLR, ?" TRS; Output: Passive Speaker (supports banana plug or bare wire connection)¡¢Passive subwoofer.
  • SINAD: XLR--101dB; RCA--93dB; SNR: ¡Ý123dB
  • Rated Power Output: 48V/5A 240W@4¦¸; 32V/5A 100W@4¦¸; 48V/5A--115W@8¦¸; Maximum Power Output: 48V/10A 300W@4¦¸.

Premium Internal Components

Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers

NICHICON Caps, Japanese

Ensure superior sound clarity, longevity, and stable electrical performance, enhancing the fidelity of audio reproduction.

Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers

WIMA Caps, German

Provide exceptional sound quality and signal stability, greatly enhancing the audio experience.

Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers

ELNA Caps, Japan

Ensure enhanced audio clarity and stability, contributing to a richer sound experience.

Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers

Sumida Inductor, Japanese

Offers superior signal purity and noise reduction, elevating the amplifier's sound performance.

Friendly Solutions Guide

1. Heat Dissipation

- It is recommended to use V3 MONO within the rated power range to avoid overheating. (Rated Power 240W, Maximum Power 300W)

- Place V3 MONO in a cool and ventilated working environment or use it with a cooling fan. It also can attach an aluminum heat sink to the top with a thermo-transferring adhesive to achieve effective heat dissipation

2. Function Troubleshooting

- Ensure all wiring is correct (connect the positive speaker wire to the amplifier¡¯s positive terminal, the negative to the negative terminal, and make sure the speaker wires do not touch each other, as this could cause a short circuit and potentially damage the amplifier). ---In AUTO mode, if no signal is detected for 10 minutes, the V3 MONO will automatically enter standby mode to save energy, and will reactivate upon detecting a signal, combining convenience with energy efficiency. Ensure a stable signal connection.

3. Audio Sound Quality:

- Sound Volume: The V3 Mono is a pure power amplifier with no volume control or knobs. It has a gain of 19 dB / 25 dB for RCA inputs and a fixed gain of 20 dB for XLR inputs. It can be adjusted to above 19dB to increase the volume and output power.

- Audio Quality: Different audio source qualities affect the sound quality. It is recommended to use high-quality, lossless audio files, such as FLAC, WAV and other formats, to obtain a better sound quality experience. V3 MONO supports impedance of 4-8¦¸. Speaker impedance that is too low or too high will cause unstable amplifier output and affect the sound quality performance.--- Please replace with a high-quality RCA cable with good shielding to prevent noise.

4. Compatibility:

- NOT Compatible: Active Subwoofer, Bass Shaker, Bass Audio,Bluetooth, USB/COA/OPT decoding amplifier, and does not support headphone amplifiers.--- Suggest Burson V7 Vivid opamps with soft extension cable.

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