【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio
【Pre - Sale】Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp - Fosi Audio

Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp

Regular price
$109.99 USD
Sale price
$109.99 USD
Regular price
$109.99 USD
Tax included. Shipping calculated at checkout.
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Model:
Continuation of Co-Creation

Engineered for Audiophiles - Optimal Choice for Home Audio Systems

In 2023, following the launch of the V3 stereo amplifier, we received numerous valuable suggestions and feedback from our global audio lovers. We listen intently, record diligently, and develop with dedication, ultimately striving to transform your suggestions and ideas into reality—the V3 mono.
Input: RCA, XLR, ¼" TRS; Output: Passive Speaker (supports banana plug or bare wire connection)
SINAD: XLR--101dB; RCA--93dB; SNR: ≥123dB
Rated Power Output: 48V/5A 240W@4Ω; 32V/5A 100W@4Ω

Post-Filter Feedback Technology Integrated

Significantly reduces distortion, enhances linearity and frequency response to get superior sound.

Compact Yet Powerful

Crafts an immersive sound experience, satisfying your craving for superior musical quality.

Accurate Imaging with Zero Crosstalk

Enhances stereo depth and soundstage accuracy for a purer audio experience.

Easily Replaceable DIP8 Dual Discrete Op-amps

Meeting your pursuit of a personalized audio experience

Provides You with Flexible Connectivity Options

Effortlessly switched by a toggle switch, easily adapted for both home and professional scenarios.

Advanced Cooling Design

Guarantees long-term efficient operation of the amp, prevents overheating.

With Minimalist Design

Effortlessly integrates into various settings like home theater, study room, desktop, and studios.

Automatic Signal Sensing

Enters standby after 10 minutes of no signal input, effectively reducing power consumption.

NICHICON Caps, Japanese

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

WIMA Caps, German

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

Sumida Inductor, Japanese

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

ELNA Caps, Japan

Ensure enhanced audio clarity and stability, contributing to a richer sound experience.
  • 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 @4Ω 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.[Note: It is estimated that the pre-sale order will be shipped between August 8th and 18th.]

  • 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/¼" 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 such as Sparkos SS3602, MUSES02, OPA2604, Burson V5i, V6, V7, and more.

  • V3 mono stereo audio component mini power monoblock amplifier 2 channel amplifier single channel 2/2.1/3/4/5 channel class d amp tpa3255 for home theater desktop outdoor bookshelf Tower floorstanding passive speakers ZA3.
    Tips: If you're in need of a Stereo amplifier, you can check out the V3.
  • Channel : 1.0
  • Amplifier Chip : Texas Instruments TPA3255 
  • Input : RCA, XLR, ¼" TRS
  • Output : Speaker Output (supports banana plug or bare wire connection) 
  • SINAD : XLR: 101dB ; RCA: 93dB 
  • SNR : ≥123dB 
  • Dynamic Range : ≥123dB 
  • THD : <0.006% 
  • Gain : XLR/¼” TRS: 20dB ; RCA: 25dB, 31dB;  
  • Terminal Impedance : 2-8Ω 
  • Rated Power Output : 48V/5A--240W@4Ω ; 32V/5A --100W@4Ω 
  • Frequency Response : 10Hz-30kHz(±0.06dB)  
  • Input Voltage Range : DC 32-48V  
  • Standard PSU : 48V/5A 
  • V3 MONO Power Amplifier

Opamps - I am using a pair of V3 mono amplifiers and am only using the RCA audio input, If I wanted to experiment with an alternative Opamps, am I able to only replace a single Opamp in each V3 mono, or do I need to change multiple Opamps per V3 mono amplifier?
Is the answer different if I was using the XLR balanced input?

https://support.fosiaudio.com/hc/en-us/articles/33329687302297-The-V3-Mono-has-three-op-amps-What-does-each-one-do-And-if-l-want-to-get-abetter-sound-which-one-should-l-change

Dear V3 mono owners,We are kindly to announce that the output polarity of V3 MONO has been revised since August 2.

For V3 MONO units purchased on or after August 2nd, 2024: The output polarity of V3 MONO has been revised. You can connect your speaker terminals normally without reversing the polarity.


For V3 MONO units purchased before August 2nd, 2024: Using two V3 Monos together won't cause any phase issues. However, if you integrate one V3 Mono with other equipment, please note that the phase might be inverted. To achieve optimal sound quality, please connect the speaker terminals reversely when connecting to your V3 MONO amplifier.

If you purchase the V3 Mono from the Fosi Audio website after August 2nd, 2024, it will be the updated version. For purchases from platforms like Amazon, eBay, or AliExpress, please contact our customer service to confirm which version you are receiving.We apologize for any inconvenience caused by this and appreciate your patience as we worked diligently to rectify the problem.


If you have any questions or require further assistance, please contact our customer support team: support@fosiaudio.com.Kind regardsFosi Audio Team

Customer Reviews

Based on 49 reviews
80%
(39)
14%
(7)
6%
(3)
0%
(0)
0%
(0)
C
Cameron MacMartin
Like them

Sound Great

L
Luc JOANNESSE
Oui mais...

Bonjour,
J'utilise le V3 mono en configuration hifi, donc il est possible de faire un ensemble intéressant sur des enceintes bibliothèques de 84db de rendement, je doute cependant de la capacité du V3 sur des enceintes colonnes au rendement peu élevé du fait d'une "légèreté" au niveau du rendu sonore, le V3 est donné pour une puissance qui correspond plus à un ampli de classe AB de 50W avec une grosse alimentation et de ce fait, de part la conception du V3 il manque tout de même de "corps" de dynamique sur une masse orchestrale.
J'ai parfois des sons étranges au niveaux des enceintes lors de l'allumage, inquiétant... J'ai aussi été étonné de la chaleur dégagé par le V3, je conseille de placer le gain sur 25db et non 31db, j'ai d'ailleurs changer la pâte thermique et ajouter 2 dissipateurs thermiques afin de refroidir l'ensemble (ce n'est pas non plus un volcan...). Bon, je ne vais pas écrire un roman, alors je peux dire honnêtement (contrairement à certains influenceurs que sont plus menteurs qu'honnêtes) que le V3 devrait être vendu pour 100 euros, que s'il manque de corps il n'en demeure pas moins qu'il est capable de jouer très agréablement sur l'ensemble du spectre sonore et sur différents styles (le plus important étant la qualité de l'enregistrement, il y aurait beaucoup à dire sur certains "ingénieurs du son"), qu'il permet de se faire un ensemble agréable et efficace par rapport à des amplificateurs surcotés et beaucoup plus chers, la simplicité de sa conception joue en sa faveur et même si la chaleur me fait douter de la longévité du V3 et de ce fait des composants soumis à cette chaleur, bref dans l'ensemble c'est très bien et n'oublions pas la réactivité du service client Fosi, ça reste important.
L'avenir me dira si ça a été un bon achat.
Merci et bonne journée.

E
Ed Rie
Mono V3

It's simple, and very very small.
Two of these audio midgets are tremendous in stereo sound quality.
All you need, all you want
Treat them well, and be treated.

J
Jerome Maillot
En attente de livraison / waiting for shipment

J'ai acheté deux V3 mono le 9 octobre 2024. j'ai reçu confirmation de commande et les produits devaient être envoyé le lendemain, j'attends toujours l'envoi on est le 17 octobre.
j'ai un ami qui attends lui depuis 10 semaines ... Les retours SAV de fosi ne sont ni cordiaux ni commerciaux. On vous informe d'attendre point je mettrais a jour

I purchased two V3 mono on October 9, 2024. I received order confirmation and the products were to be sent the next day, I am still waiting for the shipment, it is October 17.
I have a friend who has been waiting for 10 weeks... The after-sales service feedback from fosi is neither cordial nor commercial. We inform you to wait, I will update

W
William Smith
What a fantastic amp!

I have always been a staunch class A guy. I have been hearing so much buzz about class D that I finally decided it was time to see for myself if there was any merit to the hype. I ordered a couple of amps that I’ve heard these most about, and ICEpower 50ASX2se and a pair of the Fosi Audio V3 mono-blocks. A big part of my motivation for the Fosi amps was the high quality components they’re built with and I am very drawn to the idea of op-amp rolling. I got these little amps setup with a pair of individual 48v 5A GaN power supplies and fed Tidal from a WiiM to my Benchmark USB1 DAC, from there balanced cables to the V3s and then off to my custom built MarkAudio P7HDs in Pensil enclosures and WOW! These tiny amps have a ton of power and sound fantastic! Frankly I don’t even see a need experiment with other op-amps. The TI units in them sound great, but I’m too much of a tinkerer to resist. I have to say, now I get it. The minimal size, efficiency and lack of heat produced are huge advantages is several situations and I am not hearing any drawbacks. No loss in sound stage, dynamics, imaging or tone. Just beautiful sound with loads of headroom. If you’re on the fence, try them. You will not regret it.

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