--- product_id: 641781472 title: "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" brand: "fosi audio" price: "AR$814128" currency: ARS in_stock: true reviews_count: 13 category: "Fosi Audio" url: https://www.desertcart.com.ar/products/641781472-v3-mono-power-amplifier-for-home-audio-speakers-mini-monoblock store_origin: AR region: Argentina --- # 240W peak power @4Ξ© THD 0.006%, SINAD 101dB, SNR 123dB Advanced full-body heat dissipation 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 **Brand:** fosi audio **Price:** AR$814128 **Availability:** βœ… In Stock ## Summary > 🎢 Power your passion with precision and style β€” the Fosi V3 Mono amps your home audio game! ## Quick Answers - **What is this?** 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 by fosi audio - **How much does it cost?** AR$814128 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/641781472-v3-mono-power-amplifier-for-home-audio-speakers-mini-monoblock) ## Best For - fosi audio enthusiasts ## Why This Product - Trusted fosi audio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Cool Under Pressure:** Innovative full-body heat dissipation and dual side vents keep your amp running flawlessly during marathon listening sessions. - β€’ **Powerhouse Precision:** Unleash 240W of crystal-clear Class-D power to drive your premium speakers with authority. - β€’ **Flexible Connectivity:** Seamlessly switch between balanced XLR/ΒΌ" TRS and RCA inputs with gain control for ultimate system integration. - β€’ **Audiophile-Grade Components:** Built with TPA3255 chip, Japanese Nichicon & ELNA capacitors, and German WIMA parts for pristine sound fidelity. - β€’ **Customizable Sound Signature:** Swap out op-amps like Sparkos or Burson to tailor your audio experience and stand out in your audiophile circle. ## Overview The Fosi Audio V3 Mono is a compact, high-performance Class-D amplifier delivering 240W at 4Ξ©, engineered with cutting-edge PFFB technology and premium audiophile components. Designed for flexible multi-channel home theater setups, it features advanced heat dissipation, balanced and single-ended inputs, and customizable op-amps, making it a top-tier choice for discerning audiophiles seeking powerful, clean, and dynamic sound. ## Description Crafted for audiophiles, the V3 Mono amplifier delivers up to 240W to drive a single speaker. Its PFFB technology provides a clean, high-quality audio experience. Review: Believe the hype, these Fosi v3 monoblocks are exceptional. - I bought 4 of these Fosi v3 monoblocks with 2 x 48volt/10amp power supply units. They are being used to drive Tannoy XT8F revolution tower speakers in a vertical mono/bi-amp mode ( i.e. each speaker is connected to 2 monoblocks with a shared PSU ). After an initial 24 hour burn in, they opened up to produce a wonderfully transparent, dynamic and powerful sound. The treble is clean without edge or grain, the midrange is very clear with excellent low level detail resolution and the bass is well controlled, defined, extended and surprisingly hard hitting. The overall tonal balance is quite neutral with just a hint of treble forwardness. The Fosi v3 small form factor, belies its capability when producing a very large soundstage with terrific focus on, and the space between, the musical elements within it. Plus the stereo imagery is precise with good centre focus, coherence and decent depth. I was originally sceptical about the V3 mnbks when I heard, read and saw ( on You tube ) the rave reviews about them. Now I have confirmed for myself, their exceptional performance for the money. Compared to my 2 other, much more expensive power amps, from Marantz and Emotiva, they more than hold their own. Highly recommended. Additional information:- Everything said about the v3 monoblocks remains the same, ( if anything they're even better sounding than when they were first reviewed, due to slightly less treble forwardness ). However they do become hot during use. Therefore I recommend using a low noise fan ( if you can't put them on/in a well ventilated shelf/cabinet ). DON'T stack them on top of each other without adding feet to separate them. Review: Magnificent.aq - A pair of these with a wiim pro plus streamer, with variable output, will out perform so called "proper hi-fi", costing 10 to 20 times the price. Believe me these are an absolute steal. I use the with monitor audio silver 6 floorstanders, Β£1000 a pair and they sound magnificent. ## Features - 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 @4Ξ© 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. - 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/ΒΌ" 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D31M3DXY | | Best Sellers Rank | 12,669 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 41 in Hi-Fi Amplifiers | | Brand | Fosi Audio | | Country Of Origin | China | | Customer Reviews | 4.2 out of 5 stars 502 Reviews | | Included Components | 48V Power supply | | Item Dimensions | 14.5 x 10.8 x 4 centimetres | | Item Weight | 750 Grams | | Item dimensions L x W x H | 14.5 x 10.8 x 4 centimetres | | Manufacturer | Fosi Audio | | Manufacturer Part Number | un pezzo | | Material | Metal | | Maximum Supply Voltage | 48 Volts | | Maximum supply voltage | 48 Volts | | Minimum Supply Voltage | 32 Volts | | Minimum supply voltage | 32 Volts | | Model Number | V3 Mono | | Mounting Type | Surface Mount | | Mounting type | Surface Mount | | Number of Channels | 1 | | Number of Items | 1 | | Operating Temperature | 23 Degrees Celsius | | Output Power | 240 Watts | | Package Type Name | cardboard box | | Specification Met | CE | | Supply Current | 5 Amps | | Voltage | 230 Volts | ## Product Details - **Item dimensions L x W x H:** 14.5 x 10.8 x 4 centimetres - **Manufacturer:** Fosi Audio - **Maximum supply voltage:** 48 Volts - **Minimum supply voltage:** 32 Volts - **Voltage:** 230 Volts ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/51UT2mXOVcL.jpg) ## Available Options This product comes in different **Number Of Items** options. ## Questions & Answers **Q: No sound change after switching the gain switch?** A: The gain switch on the V3 MONO only works with the RCA input. When using RCA mode, switching the gain setting will noticeably change the volume. (If it's already set to RCA mode, the output level from the preamp is usually sufficient.) **Q: Would the noise still occur if no audio input cables are connected?** A: Try replacing the audio source, using well-shielded audio cables, and switching to a different speaker. **Q: Doesn't work in standby mode?** A: Use a separate power supply and power strip for each V3 MONO to avoid ground-loop noise affecting the standby function; if the light dims but the unit doesn't automatically shut down, please try replacing high-quality RCA cables. **Q: V3 MONO don't have volume control or knobs?** A: Yes. V3 MONO is a pure power amplifier, it is recommended to use it with a DAC, preamplifier, or player with volume control. **Q: What's the V3 MONO?** A: V3 MONO is a mono channel amplifier. To achieve 2 channel amplifier effect, two V3 MONO are needed to connect two speakers. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Believe the hype, these Fosi v3 monoblocks are exceptional. *by P***E on 11 October 2024* I bought 4 of these Fosi v3 monoblocks with 2 x 48volt/10amp power supply units. They are being used to drive Tannoy XT8F revolution tower speakers in a vertical mono/bi-amp mode ( i.e. each speaker is connected to 2 monoblocks with a shared PSU ). After an initial 24 hour burn in, they opened up to produce a wonderfully transparent, dynamic and powerful sound. The treble is clean without edge or grain, the midrange is very clear with excellent low level detail resolution and the bass is well controlled, defined, extended and surprisingly hard hitting. The overall tonal balance is quite neutral with just a hint of treble forwardness. The Fosi v3 small form factor, belies its capability when producing a very large soundstage with terrific focus on, and the space between, the musical elements within it. Plus the stereo imagery is precise with good centre focus, coherence and decent depth. I was originally sceptical about the V3 mnbks when I heard, read and saw ( on You tube ) the rave reviews about them. Now I have confirmed for myself, their exceptional performance for the money. Compared to my 2 other, much more expensive power amps, from Marantz and Emotiva, they more than hold their own. Highly recommended. Additional information:- Everything said about the v3 monoblocks remains the same, ( if anything they're even better sounding than when they were first reviewed, due to slightly less treble forwardness ). However they do become hot during use. Therefore I recommend using a low noise fan ( if you can't put them on/in a well ventilated shelf/cabinet ). DON'T stack them on top of each other without adding feet to separate them. ### ⭐⭐⭐⭐⭐ Magnificent.aq *by C***R on 26 July 2026* A pair of these with a wiim pro plus streamer, with variable output, will out perform so called "proper hi-fi", costing 10 to 20 times the price. Believe me these are an absolute steal. I use the with monitor audio silver 6 floorstanders, Β£1000 a pair and they sound magnificent. ### ⭐⭐⭐⭐⭐ Highly recommended *by A***R on 12 September 2025* These little boxes have really surprised me. I was using a Rega Elicit R that has powered most of my speakers for the past 10+ yrs and it has served as an excellent amp. I recently purchased a set of Kef R3 Meta's and something in the sound I was hearing suggested they just weren't getting enough power from the Rega. I was considering NAD, Hegel or Nord as my next move, when I stumbled across these (Fosi v3 mono). For the price I thought I could test what 240W (4 Ohm) would do to the Kef's before committing to my next amp, whilst also experimenting with monoblocks. I've been using them for about 10 hrs now and I can honestly say they are amazing, not just for the money amazing, they are simply very good at what they do. Noticeable clarity and separation improvements, engaging and tight bass and I can play music at a sensible volume without feeling like I'm losing anything in the mix. I'm not saying I won't still get a big power amp down the road but these will certainly stay in use for the foreseeable. ## Frequently Bought Together - 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 48V/5A Power - Fosi Audio ZD3 Desktop DAC Preamp, Fully Balanced Digital to Analog Audio Converter with ES9039Q2M for Home Stereo Amplifier, Bluetooth/USB/Optical/Coax/TV HDMI ARC Input, XLR/RCA Output with Remote --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.ar/products/641781472-v3-mono-power-amplifier-for-home-audio-speakers-mini-monoblock](https://www.desertcart.com.ar/products/641781472-v3-mono-power-amplifier-for-home-audio-speakers-mini-monoblock) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-09-11*