--- product_id: 650459401 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 48V/5A Power" brand: "fosi audio" price: "€ 378.34" currency: EUR in_stock: true reviews_count: 13 category: "Fosi Audio" url: https://www.desertcart.sk/products/650459401-v3-mono-power-amplifier-for-home-audio-speakers-mini-monoblock store_origin: SK region: Slovakia --- # 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 48V/5A Power **Brand:** fosi audio **Price:** € 378.34 **Availability:** βœ… In Stock ## Summary > 🎢 Elevate your sound game with Fosi Audio V3 Mono β€” where power meets purity. ## 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 48V/5A Power by fosi audio - **How much does it cost?** € 378.34 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/650459401-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 high-end speakers with zero distortion. - β€’ **Flexible Connectivity:** Seamlessly switch between balanced XLR/TRS and RCA inputs with gain control for ultimate system compatibility. - β€’ **Custom Sound Signature:** Swap out stock op-amps with your favorite DIP8 dual discrete options to tailor your audio experience like a pro. - β€’ **Audiophile-Grade Components:** Premium Nichicon, ELNA, WIMA capacitors and Sumida inductors deliver pristine sound fidelity and ultra-low noise. ## Overview The Fosi Audio V3 Mono is a compact, high-performance Class D power amplifier delivering up to 240W at 4Ξ©, featuring cutting-edge PFFB technology for ultra-low distortion and enhanced frequency response. Equipped with premium Japanese and German components, advanced cooling design, and versatile input options (XLR, TRS, RCA), it’s engineered for audiophiles seeking a customizable, distortion-free home audio or theater experience. ## Description 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 : desertcart.in: Electronics Review: Highly Recommendable! - I am overwhelmed at the performance of these tiny PowerAmps. They drive my DALI Sonik5s at their optimal performance with full authority. Being two monoblocks, there's a zero Cross-talk: resulting in razor sharp imaging, pitch black background an ultra resolving sound with a soundstage wider than the physical speaker separation. V3 Mono pair is a really fuss-free option. It's 'Auto' mode supports well. It's Balanced XLR-In is a major advantage! Earlier I heard about the thinness, lack of body, dryness of the sound signature from a Class D amplifiers. But these FosiAudio V3 Mono pair sounds very much musical, organic and engaging overall. I have no complain: and I think it is one of my most wise decisions to go with V3 Mono pair. It may be noted that for last one decade I was without Class A/B amplifier from the house of Marantz. And, now I'm thoroughly enjoying the V3 Monos. At its price point, the V3 Mono is highly recommendable! Having both RCA and XLR Inputs, it's very much flexible at Connectivity. I have operated it continuously for about 2 hours at around 95% of Volume from WiiM Ultra, it becomes hot, but that's quite reasonable and remains in acceptable touch limits. Review: Excellent - Performance is excellent ## Features - Mini Monoblock Amplifier: Crafted for HiFi audiophiles, the amplifier home audio 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 audio component amplifiers 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 stereo amplifier 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. 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D31M3DXY | | Best Sellers Rank | #192,303 in Electronics ( See Top 100 in Electronics ) #323 in Hi-Fi Amplifiers | | Brand Name | Fosi Audio | | Customer Reviews | 4.2 out of 5 stars 317 Reviews | | Importer Contact Information | support@fosiaudio.com | | Item Dimensions | 14.5 x 10.8 x 4 Centimeters | | Item Type Name | amplifier | | Item Weight | 750 Grams | | Item dimensions L x W x H | 14.5 x 10.8 x 4 Centimeters | | Manufacturer | Fosi Audio | | Maximum Output Power | 240 watts | | Maximum Supply Voltage | 48 Volts | | Minimum Supply Voltage | 48 Volts (DC) | | Model Number | V3 Mono | | Mounting Type | Freestanding | | Number of Channels | 1 | | Number of Items | 5 | | Packer Contact Information | support@fosiaudio.com | | Part Number | un pezzo | | Specification Met | CE | | Voltage | 230 Volts | ## Product Details - **Item dimensions L x W x H:** 14.5 x 10.8 x 4 Centimeters - **Manufacturer:** Fosi Audio - **Maximum Supply Voltage:** 48 Volts - **Minimum Supply Voltage:** 48 Volts (DC) - **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 48V/5A Power - Image 1](https://m.media-amazon.com/images/I/51x7N0QpPSL.jpg) ## 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 ### ⭐⭐⭐⭐⭐ Highly Recommendable! *by S***K on 19 August 2026* I am overwhelmed at the performance of these tiny PowerAmps. They drive my DALI Sonik5s at their optimal performance with full authority. Being two monoblocks, there's a zero Cross-talk: resulting in razor sharp imaging, pitch black background an ultra resolving sound with a soundstage wider than the physical speaker separation. V3 Mono pair is a really fuss-free option. It's 'Auto' mode supports well. It's Balanced XLR-In is a major advantage! Earlier I heard about the thinness, lack of body, dryness of the sound signature from a Class D amplifiers. But these FosiAudio V3 Mono pair sounds very much musical, organic and engaging overall. I have no complain: and I think it is one of my most wise decisions to go with V3 Mono pair. It may be noted that for last one decade I was without Class A/B amplifier from the house of Marantz. And, now I'm thoroughly enjoying the V3 Monos. At its price point, the V3 Mono is highly recommendable! Having both RCA and XLR Inputs, it's very much flexible at Connectivity. I have operated it continuously for about 2 hours at around 95% of Volume from WiiM Ultra, it becomes hot, but that's quite reasonable and remains in acceptable touch limits. ### ⭐⭐⭐⭐⭐ Excellent *by R***A on 2 August 2026* Performance is excellent ### ⭐⭐⭐⭐ A good budget class D amp. But not for HiFi systems yet. *by A***Y on 27 August 2026* Pros : - Great stereo separation if you combine 2 of these monoblocks. - Okay sound quality. Neutral & flat. Suits well for nearfield bookshelfs under 5 feet. - Very compact & portable. - XLR balanced inputs. Cons : - Not for HiFi sound systems. Please stick to your traditional Class AB/A integrated amps. - Very low gain for slightly bigger rooms. - RCA inputs still output a bit of phase smearing noises above 67 volume. - Boxes heat up. Maybe build a bit bigger box for better heatsink capability. Class D tech improved a lot. But it still needs more refinements for better damping factor, better phase & gain control. ## 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.sk/products/650459401-v3-mono-power-amplifier-for-home-audio-speakers-mini-monoblock](https://www.desertcart.sk/products/650459401-v3-mono-power-amplifier-for-home-audio-speakers-mini-monoblock) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-09-07*