--- product_id: 68014327 title: "Fosi Audio BT20A Bluetooth Amplifier for Speakers, Mini Stereo 2 Channel Amp Class D, with TPA3116 Chips 100W x 2 and Bass Treble Controls, for Home Audio Outdoor Passive Desktop Bookshelf Speakers" brand: "fosi audio" price: "$243.24" currency: USD in_stock: true reviews_count: 13 category: "Fosi Audio" url: https://www.desertcart.us/products/68014327-fosi-audio-bt20a-bluetooth-amplifier-for-speakers-mini-stereo-2 store_origin: US region: United States of America --- # Bluetooth 5.0 with 50ft range 100W x 2 power output Bass & Treble controls Fosi Audio BT20A Bluetooth Amplifier for Speakers, Mini Stereo 2 Channel Amp Class D, with TPA3116 Chips 100W x 2 and Bass Treble Controls, for Home Audio Outdoor Passive Desktop Bookshelf Speakers **Brand:** fosi audio **Price:** $243.24 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your sound game—small amp, massive impact! ## Quick Answers - **What is this?** Fosi Audio BT20A Bluetooth Amplifier for Speakers, Mini Stereo 2 Channel Amp Class D, with TPA3116 Chips 100W x 2 and Bass Treble Controls, for Home Audio Outdoor Passive Desktop Bookshelf Speakers by fosi audio - **How much does it cost?** $243.24 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/68014327-fosi-audio-bt20a-bluetooth-amplifier-for-speakers-mini-stereo-2) ## 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 - • **Powerhouse Performance:** 100W per channel delivers room-filling, distortion-free sound that commands attention. - • **Audiophile-Grade Clarity:** TI TPA3116D2 chips minimize distortion (<0.04% THD) for crystal-clear highs and deep, pure bass. - • **Compact & Durable Design:** Sleek, all-metal chassis fits anywhere—home, office, or outdoor setups—built to last with a premium feel. - • **Tailored Audio Experience:** Adjust bass and treble on the fly to match your mood and music style with precision controls. - • **Seamless Wireless Streaming:** Bluetooth 5.0 connectivity ensures effortless, high-quality music playback up to 50 feet away. ## Overview The Fosi Audio BT20A is a compact yet powerful Bluetooth 5.0 amplifier delivering 100W per channel with ultra-low distortion. Featuring bass and treble controls, an all-metal durable design, and TI TPA3116D2 chips, it offers audiophile-grade sound clarity for home or outdoor passive speakers. With seamless wireless streaming up to 50 feet and a 24-month warranty, it’s the smart upgrade for millennial professionals craving premium sound without the bulk. ## Description Product Description Bluetooth 5.0 Mini Power Amplifier Fosi Audio was founded with a simple goal: Build products that sound great and make people want to listen to music every day. We design and have many Hi-Fi audio products on the market. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio products. Product Parameters 2.0 Channel Bluetooth 5.0 Stereo Power Amplifier Power Adapter: 24V/4.5A, DC Input Range: 12-24V MAX Power Output: 100W x 2, Terminating Impedance: 2 Ohm - 8 Ohm THD ≤ 0.04%, SNR ≥ 98dB, Input Sensitivity ≤ 280mV Frequency Range: 20Hz - 20kHz (±1 dB), Input Mode: Bluetooth and RCA Bluetooth Transmission Distance: Up to 50 Ft up to 50ft connection Bluetooth Receiver Amplifier Instant setup with phones, tablets, and almost any other Bluetooth-enabled device. easy to fit your system with Bass and Treble Control Exclusively designed for the customers who pursue HiFi sound. MAX power output 100W*2 Simple Compact Design but Practical and Powerful 100 watt per channel power output can drive most home passive speakers to create astonishing Sound. made for audiophile Extraordinary Clarity Hi-Fi Sound Even at high volumes, there’s less than 0.04% harmonic distortion resulting in remarkable clarity. for bookshelf speakers 2.0 Channel Wireless Stereo Amplifier Easy to fit your audio system with Bluetooth and RCA input. TI TPA3116D2 Chip Advanced Circuitry Architecture The Texas Instruments TPA3116D2 Chip presents music with rousing highs and deep lows. Safe DC Outlet With a built-in power protection circuit, there are no sparks flying when you plug the power adapter into the amplifier. Safe for use! 24V/4.5A Power Supply Fosi Audio BT20A equip with an energy-efficient and stable power supply can get an astonishing sound. Fosi Audio Amplifiers Comparison BT20A BT20A MAX BT20A PRO BT30D BT30D PRO V3 TB10D Review: This is a breakthrough! - I had a Cambridge Audio amplifier, which has finally given up the ghost - annoying crackle and cut-out on one side of the stereo. It was driving me mad. I listen to classical music a lot. Looking around for a replacement stand-alone amp was proving costly - I have a brand new CA CD player and good CA bookshelf speakers which I didn't want to junk (which I'd have had to if I'd bought a self contained hi-fi system, which at first seemed the only option) Looking around on the net I found this amazing little piece of kit and thought, well, this is so cheap that even if it's not up to much it's better than half the music being cut off periodically by my dying CA amp, and I went for it. It's astonishing. It has plenty of power, and its treble and bass controls are very useful - my old amp didn't have those - as I listen to old recordings too which sometimes need a bit of bass boost or treble cut-back. I have a mass of music on MP3 files on a computer in an adjacent room which I can now listen via the excellent reliable Bluetooth connection. The CD player connected to the little amp works fabulously too. The sound quality has plenty of presence and is not remotely tinny or restricted, which I'd feared with such a little machine. This is a brilliant idea and a mini-revolution in amp design. The folks at Fosi have found a serious hole in the market and plugged it with a great range of innovative and smart kit. Very highly recommended! Review: Great compact amplifier - Last year I had bought a Tangent Ampster BT II amplifier, which had worked great, however it recently had an issue with the power switch, so had to be sent away for repair. As I used it in my office I needed a replacement and decided to order this amplifier. I thought the Tangent Ampster was small, but this BT20A amplifier is ridiculously small! This is mainly as the power supply is external to the amplifier, which itself is bigger than the amplifier. I have it connected to a pair of Mission LX-1 MKII speakers, and I am happy to say that this amplifier easily runs these speakers, with no sign of distortion. I appreciate the treble and bass controls, as by default the treble did sound lacking and a bit stifled. The dials are nice and smooth, and the power switch toggle works without issue. At this size and price you only get 1 set of RCA inputs and 1 set of speaker outputs, but for my use case this is fine. Bluetooth works seamlessly, and the audio quality is about on par with direct RCA connection. Be aware that if you connect via bluetooth it will override the RCA input, even with no music played over bluetooth. I will say, as others have, that being able to connect to the amplifier via bluetooth without being asked for a code is a potential issue, I live in a block of apartments, so anyone could connect to it if they tried. I don't hear any hissing when not playing music, so that is another plus. Overall a great little amplifier for the price, once my other amp is back from repair I will probably relegate that to the living room as it has a remote control that is more useful. ## Features - 【Bluetooth 5.0】Featuring an integrated Bluetooth ATS2853 chip, this bluetooth amplifier supports streaming up to 50ft (15m). Effortlessly connect via Bluetooth to enjoy high-quality music from MP3, Phone, Pad, PC, or Laptop, embracing the wireless era. - 【Compact Design】Our mini amplifier offers a sturdy, space-saving design for home, office, or outdoor use. Elevate your audio experience with bass and treble controls to tweak settings as needed. - 【Immersive Audio Quality】Elevate your audio environment with room-filling sound, driven by a total output of 100W x 2 at 4 ohms. Covering a wide frequency range of 20Hz - 20kHz with less than 0.04% THD, achieve the perfect balance of volume and detail for an unparalleled home entertainment experience. - 【Superior Sound】Utilizing 2 integrated Classic TI TPA3116D2 chips, this device provides crisp, clean sound with crystal-clear highs and smooth, pure bass. It enhances voice clarity and speaker performance while maintaining lower energy consumption. - 【 Exquisite Craftsmanship】This power amplifier comes nicely packaged with a solid feel to the case and the controls and connectors. The all-metal body ensures durability, and you can enjoy the peace of mind provided by Fosi Audio's 24-month warranty. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07BQC7GNL | | Best Sellers Rank | 2,165 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 out of 5 stars 12,656 Reviews | | Item Weight | 567 Grams | | Manufacturer | Fosi Audio | | Manufacturer Part Number | BT20A | | Model Number | BT20A | | Product Warranty | 2 years | | Unit Count | 1.0 count | ## Product Details - **Item dimensions L x W x H:** 13.2 x 9 x 3.6 centimetres - **Manufacturer:** Fosi Audio - **Maximum supply voltage:** 24 Volts - **Minimum supply voltage:** 12 Volts - **Voltage:** 230 Volts ## Images ![Fosi Audio BT20A Bluetooth Amplifier for Speakers, Mini Stereo 2 Channel Amp Class D, with TPA3116 Chips 100W x 2 and Bass Treble Controls, for Home Audio Outdoor Passive Desktop Bookshelf Speakers - Image 1](https://m.media-amazon.com/images/I/61+cd+AMZcL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Can these be connected to skytronic 125.061 100w 4ohm ceiling speakers?** A: not sure.i have them connected to jbl 100 w speakers. copes fine **Q: Can I use it for 2 Technics speakers, 3way, 6ohm, 100w each?** A: I've got it wired to my old Gale Gold Mark 2, rated 6-8 ohms 100w I think? Sounds great! **Q: I want to use a 12v adapter. What size adapter pin/head is required? I have tried a few spares that I had, but none of them fit.** A: OD: 5.5mm; ID: 2.5mm BT20A comes with a 24V adapter, you can find one like its size. **Q: Can a technics direct drive turntable work via the rca input or does the turntable need a preamp?** A: The input sensitivity is stated as less than or equal to 280mV. If your turntable outputs I similar voltage (I guess in the range of 150 to 280mV) then I would say you probably don't need a preamp. However, if it's output is a lot less, you will need a preamp. Fosi have a range of turntable preamps to choose from. Look up the specs of your turntable to find it's output voltage range. Hope that helps. ## Customer Reviews ### ⭐⭐⭐⭐⭐ This is a breakthrough! *by K***L on 8 June 2021* I had a Cambridge Audio amplifier, which has finally given up the ghost - annoying crackle and cut-out on one side of the stereo. It was driving me mad. I listen to classical music a lot. Looking around for a replacement stand-alone amp was proving costly - I have a brand new CA CD player and good CA bookshelf speakers which I didn't want to junk (which I'd have had to if I'd bought a self contained hi-fi system, which at first seemed the only option) Looking around on the net I found this amazing little piece of kit and thought, well, this is so cheap that even if it's not up to much it's better than half the music being cut off periodically by my dying CA amp, and I went for it. It's astonishing. It has plenty of power, and its treble and bass controls are very useful - my old amp didn't have those - as I listen to old recordings too which sometimes need a bit of bass boost or treble cut-back. I have a mass of music on MP3 files on a computer in an adjacent room which I can now listen via the excellent reliable Bluetooth connection. The CD player connected to the little amp works fabulously too. The sound quality has plenty of presence and is not remotely tinny or restricted, which I'd feared with such a little machine. This is a brilliant idea and a mini-revolution in amp design. The folks at Fosi have found a serious hole in the market and plugged it with a great range of innovative and smart kit. Very highly recommended! ### ⭐⭐⭐⭐⭐ Great compact amplifier *by J***H on 14 May 2024* Last year I had bought a Tangent Ampster BT II amplifier, which had worked great, however it recently had an issue with the power switch, so had to be sent away for repair. As I used it in my office I needed a replacement and decided to order this amplifier. I thought the Tangent Ampster was small, but this BT20A amplifier is ridiculously small! This is mainly as the power supply is external to the amplifier, which itself is bigger than the amplifier. I have it connected to a pair of Mission LX-1 MKII speakers, and I am happy to say that this amplifier easily runs these speakers, with no sign of distortion. I appreciate the treble and bass controls, as by default the treble did sound lacking and a bit stifled. The dials are nice and smooth, and the power switch toggle works without issue. At this size and price you only get 1 set of RCA inputs and 1 set of speaker outputs, but for my use case this is fine. Bluetooth works seamlessly, and the audio quality is about on par with direct RCA connection. Be aware that if you connect via bluetooth it will override the RCA input, even with no music played over bluetooth. I will say, as others have, that being able to connect to the amplifier via bluetooth without being asked for a code is a potential issue, I live in a block of apartments, so anyone could connect to it if they tried. I don't hear any hissing when not playing music, so that is another plus. Overall a great little amplifier for the price, once my other amp is back from repair I will probably relegate that to the living room as it has a remote control that is more useful. ### ⭐⭐⭐⭐⭐ An excellent amplifier. *by W***N on 27 September 2023* I bought this on a whim and it has turned out to be an excellent purchase. I bought it with 15% off so it was just over £70.00 and at that price I feel it to be very good value indeed. It is certainly a small amplifier and ideal for anyone with limited space. It has metal casing and feels very solidly built. This gives me confidence as so many items seem flimsy these days. I use it mainly with a CD player and the sound quality is superb and certainly loud enough. Using it for streaming over Bluetooth is also excellent. The only downside is that I find the volume etc controls a bit small and fiddly to adjust. Not a major problem really but a remote would have been nice even if increasing the price slightly. I was so impressed with it that I also purchased a BL20A a few weeks ago. That too is an excellent amplifier and I have reviewed it separately. Overall I cannot fault Fosi products and would not hesitate to buy from them again. ## Frequently Bought Together - Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker - 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.us/products/68014327-fosi-audio-bt20a-bluetooth-amplifier-for-speakers-mini-stereo-2](https://www.desertcart.us/products/68014327-fosi-audio-bt20a-bluetooth-amplifier-for-speakers-mini-stereo-2) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-05*