--- product_id: 157629410 title: "Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control" brand: "fosi audio" price: "€ 218.90" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.pt/products/157629410-fosi-audio-bt20a-pro-300w-x2-tpa3255-bluetooth-5-0 store_origin: PT region: Portugal --- # 300W x2 Power Output Bluetooth 5.0 Enhanced Range Customizable Bass & Treble Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control **Brand:** fosi audio **Price:** € 218.90 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your sound game—because your speakers deserve a pro-level amp! ## Quick Answers - **What is this?** Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control by fosi audio - **How much does it cost?** € 218.90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/157629410-fosi-audio-bt20a-pro-300w-x2-tpa3255-bluetooth-5-0) ## 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 - • **Tailor Your Sound:** Replaceable Op-Amps and precise bass/treble controls let you craft a signature audio experience. - • **Energy Smart Design:** Low idle power consumption (<2.5W) means premium sound without the premium energy bill. - • **Powerhouse Performance:** Dual 300W channels deliver room-filling, crystal-clear sound that commands attention. - • **Seamless Bluetooth 5.0:** Effortlessly connect from up to 15 meters with quick pairing and memory function—cut the cords, not the quality. - • **Plug & Play Versatility:** Supports RCA, Bluetooth, and pre-out connections—perfect for desktop setups or upgrading your home audio ecosystem. ## Overview The Fosi Audio BT20A Pro is a compact yet powerful Class D stereo amplifier featuring TI's TPA3255 chip, delivering 300W per channel with ultra-low distortion and high signal-to-noise ratio. Equipped with Bluetooth 5.0 for stable wireless streaming up to 15 meters, customizable sound via replaceable Op-Amps, and intuitive bass/treble controls, it’s designed for audiophiles seeking premium Hi-Fi performance in a sleek, energy-efficient package. Backed by a 2-year warranty and a trusted brand reputation, it’s the smart upgrade for modern home audio setups. ## Description Discover Fosi Audio - Your HiFi Solution! We're a tech-driven brand, crafting innovative audio products around the world. Our vision: Affordable excellence for each consumer. Our mission: Redefining HiFi with cost-effective innovations. Join Fosi Audio on this unique audio journey! Stream Every Sonic Detail Stereo Power Amplifier, 300W x 2 Hi-Fi Audio Amp with PFFB Technology, LDAC Bluetooth 6.0 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier 300W x2 TPA3255 Class D Home Audio Mini Speaker 2 Channel Amp 300 Watts x2 Tube Integrated Amplifier with DAC, 2 Channel Home Audio Stereo Power Amp for HiFi Bookshelf Speakers Bluetooth Stereo Amplifier Home Audio Component Mini Amp with VU Meter Bluetooth Amplifier for Outdoor Speakers, 4 Channel Power Amp for Bass Shaker Sim Racing Cockpit For the past 5 years, we have been designing and developing audio products for real life, aiming to provide a perfect blend of premium acoustic performance with a modern, elegant design. We’re not limited by what’s possible now. With a bold vision for the future of audio products, we painstakingly develop advanced technology and innovative research to make it a reality. We use meticulous production technology, combined with low-key modern industrial design, to present the sound as clear and pure as flawless crystal. Input: Bluetooth + RCA; Output: Passive Speakers + Pre-out Amp chip: TPA3255; MAX Output Power: 300Wx2@4Ω THD: ≤ 0.03%; SNR: ≥108dB; Frequency Response rRange: 20Hz-20kHz(±1.2dB) Bluetooth Distance: ≥15m; Bluetooth Transmission Format: SBC/AAC Allowing you to connect your devices such as mobile phones and tablets from a greater distance. Experience the authentic sound without any added effects by adjusting them to their middle points. Easily connect to a powered subwoofer, speaker, or another amplifier for versatile audio options. Suitable for desktop, free your living room from CD suitcase around and also large amplifiers. Has a unique smart algorithm that optimizes the output stage for max efficiency and min distortion. Upgrade Audio Performance The two plug-in NE5532 Op-Amps can be replaced by LME49720HA/MUSES02/OPA2134PA Op-Amps, etc. Low DC resistance and excellent frequency characteristics which improve performance The 2-channel amplifier uses a low standby power feature that reduces the power consumption when the amplifier is not in use, contributing to energy savings. Clear the Bluetooth pairing by holding the volume control for five seconds. Benefit from easy pairing with the memory function and an alert tone. BT20A PRO BT20A MAX BT20A BT30D PRO HT4S ZA3 ## Features - TI TPA3255 Chip Amplifier with 300 Watts x 2 Power Output: Advanced feedback design and high-speed gate driver error correction for efficient and high-quality audio performance, with low idle losses of <2.5W. - Upgraded High-Efficiency: A significant upgrade from the BT20A amplifier with replaceable Op-Amps for customized. You can replace the two plug-in NE5532 Op-Amps with LME49720HA/MUSES02/OPA2604AP/OPA2134PA/LM4562/NJM4556AD Op-Amps to achieve a unique sound quality. With SNR≥108dB and THD≤0.005%. - Enhanced Bluetooth 5.0 Connectivity: The Bluetooth pair can be cleared by pressing and holding the volume control for five seconds. In addition, it has a memory Function for Easy Pairing and Alert Tone. - Customizable Sound with a Wide Range of Bass and Treble Controls: The BT20A Pro home audio amplifier offers a unique design for sound control. Enjoy original sound without effects by setting treble and bass effects to the middle point. - What you Get: BT20A Pro Power Amplifier x1, Bluetooth Antenna x1, 32V 5A Power Adapter x1, AC Cord x1, User Manual x1, our worry-free 24-month warranty, and friendly customer service. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B07JVFY27T | | Best Sellers Rank | 1,656 in Electronics & Photo (See Top 100 in Electronics & Photo) 2 in Hi-Fi Amplifiers | | Box Contents | Bluetooth Antenna x1, 32V 5A Power Supply x1 | | Brand Name | Fosi Audio | | Country Of Origin | China | | Customer Reviews | 4.5 4.5 out of 5 stars (2,943) 4.5 out of 5 stars | | Item Weight | 567 Grams | | Manufacturer | Fosi Audio | | Manufacturer Part Number | BT20A Pro | | Model Number | BT20A PRO | | Number Of Items | 1 | | Product Warranty | 2 years | | Unit Count | 1.0 count | ## Product Details - **Item dimensions L x W x H:** 14.2 x 10.7 x 0.4 centimetres - **Manufacturer:** Fosi Audio - **Maximum supply voltage:** 32 Volts (DC) - **Minimum supply voltage:** 32 Volts - **Voltage:** 32 Volts ## Images ![Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control - Image 1](https://m.media-amazon.com/images/I/61ne1lo34ML.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Will you be making the bt20a pro available on amazon with the 48v power supply?** A: Hi, BT20A Pro is available with the 48v power supply. **Q: Is amp a similar quality to the tangent ampster btii?** A: Yes,or better,think this is the best sub £100 BY amplifier on the market,has input for cd or turntable and a sub woofer out,great item **Q: How do you switch between bluetooth and RCA inputs if there's no selector switch?** A: Push the volume knob, however this amp auto defaults to Bluetooth if you have the source bluetooth switched on. So to select RCA connection turn Bluetooth off on the source. **Q: Does it come with a power supply?** A: Yes, almost half of the size of the amp itself ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent would recommend *by on Reviewed in the United Kingdom 11 August 2026* Excellent and well priced amp, paired with Cambridge Audio SX50 speakers and Minx x201 subwoofer. Good output even with the 32v PSU it comes with, there is a 48v PSU upgrade. Very clear and detailed and drives the speakers without issues, dispite its small size, which means it can be placed discreetly in any room. You can swap the opamps if you wish to tailor the sound, but I'm using the factory fitted ones which are fine for me. The press and hold the volume button to clear the current BT connection is useful and well thought out feature. Excellent value and performance, would fully recommend and will be getting another for another room, which this was intended for but never got past the lounge. ### ⭐⭐⭐⭐⭐ Good Value *by on Reviewed in the United Kingdom 25 April 2023* PROS- Drives my 100W speakers beautifully- A very discrete unit, fits in the palm of your hand- Easy to plug in and conceal if necessary- The case has a really good feel to it- Nice design and smooth corners- Has subwoofer connection to add bass should your speakers/setup require- Bluetooth connectivity excellent even when going downstairs with mobile in pocket (2-floor house)- Being able to disconnect the paired bluetooth device is a brilliant idea- Blue LED showing Bluetooth is paired- Red LED showing power on- Power adaptor has perfectly acceptable size- Midpoint knobs for treble and bass, allowing setting these at zero (brilliant feature)- Bass and treble controls produce excellent results in sound- Red volume knob of larger size- I'm sure there are many technical reasons why this is an excellent unitCONS- I do not have any issues with this product.SUGGESTIONS:- Provide rubber feet to install the unit vertically on its side (however anyone can get their own rubber feet or even velcro straps/adhesive velcro straps thereforeCONCLUSIONIt's hard to think what else could be improved with this product (maybe create 10 or 15 case colours to suit the needs of customers whose audio setups need to sound as good as they look).I'll get rid of my Cambridge Audio amplifier as soon as I can because it's simply no longer necessary to have something of that size to drive my audio needs. ### ⭐⭐⭐⭐⭐ Give it time to burn in then its 5 stars *by on Reviewed in the United Kingdom 26 July 2024* Used as a desktop system with Mp3 player (wired) and a soundblaster dongle from my laptop. I have a set of vintage Canton 4 ohm speakers that are efficient connected with banana plugs and pure copper wire. I am using the 32v supplied power supply.I almost returned this as when I first started using it the treble range sounded distorted and overall the amp sounded thin. Fast forward to around 20 hours use and the little Fosi is revealing itself to be a very capable unit. The separation, clarity and reserves of power are now all evident. The control through the range is now very good , excellent bass and clear treble. The tone controls work well allowing acurate amounts of adjustment if needed.Connection: Sorry I don't use bluetooth but I expect it works well. The 2 phono sockets are fine to use with whatever you plug in.The 3.5mm pre out: Disappointed with this it would not send anything to my powered sub, not a deal breaker but research on the net shows this is a common complaint. Fosi should have put a dedicated sub out for this.The build quality is fine and with the 32v supply only ever gets slightly warm. I have also read that the alternative 48v supply causes the amp to run quite hot. The output for me is enough and I can listen clearly in the room away from my desk.Apart from the issue with the pre-out I can still give 5 stars due to the overal qualities of this little amp. ## Frequently Bought Together - Fosi Audio BT20A Pro Bluetooth 5.0 Amplifier, 300W x2 Wireless Amp, TPA3255 2 Channel Mini Class D Integrated Home Audio Outdoor Stereo Receiver with Bass Treble Control for Passive Speakers - Banana Plugs with Dual Set Screws,Black and Red Aluminum Shell,6 Pairs - Amazon Basics Speaker Cable, Easy Assembly, 16-Gauge, Bronze, 100 ft --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/157629410-fosi-audio-bt20a-pro-300w-x2-tpa3255-bluetooth-5-0](https://www.desertcart.pt/products/157629410-fosi-audio-bt20a-pro-300w-x2-tpa3255-bluetooth-5-0) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-25*