--- product_id: 85729159 title: "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" brand: "fosi audio" price: "2574 kr" currency: NOK in_stock: true reviews_count: 13 category: "Fosi Audio" url: https://www.desertcart.no/products/85729159-fosi-audio-bt20a-pro-bluetooth-5-0-amplifier-300w-x2 store_origin: NO region: Norway --- # Bluetooth 5.0 Connectivity 300W x2 Power Output Custom Bass & Treble Control 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 **Brand:** fosi audio **Price:** 2574 kr **Availability:** βœ… In Stock ## Summary > 🎧 Elevate your sound game with power, precision, and wireless freedom! ## Quick Answers - **What is this?** 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 by fosi audio - **How much does it cost?** 2574 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/85729159-fosi-audio-bt20a-pro-bluetooth-5-0-amplifier-300w-x2) ## 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€’ **Powerhouse Performance:** Dual 300W channels deliver room-filling, crystal-clear sound that commands attention. - β€’ **Tailor Your Soundscape:** Adjust bass and treble independently for a personalized audio experience that fits your vibe. - β€’ **Seamless Wireless Freedom:** Bluetooth 5.0 ensures ultra-stable, lag-free streaming with effortless device pairing and memory recall. - β€’ **Audiophile-Grade Precision:** TPA3255 chip with ultra-low distortion (THD ≀ 0.005%) and high signal-to-noise ratio (β‰₯108dB) for pristine clarity. - β€’ **Upgrade Your Audio Arsenal:** Swap Op-Amps to customize tonal character, making your setup truly one-of-a-kind. ## Overview The Fosi Audio BT20A Pro is a compact, high-efficiency Class D amplifier featuring dual 300W output channels powered by the TI TPA3255 chip. It offers Bluetooth 5.0 wireless connectivity with easy pairing and memory functions, plus customizable bass and treble controls. Audiophiles can further personalize sound by swapping Op-Amps. Ideal for home or outdoor passive speaker setups, it combines powerful performance with sleek, user-friendly design. ## Description Buy 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: Amplifiers - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases Review: Perfect companion for my Sonos Port - I bought this amplifier to pair with my Sonos Port so I could use a set of Yamaha outdoor speakers, and it's been exactly what I was looking for. Setup was quick, and everything worked perfectly right out of the box. The sound is clean, powerful, and distortion-free, even when turning up the volume outdoors. I also like the compact design, it looks modern and doesn't take up much space in my media cabinet. I've had zero issues with it since installing it. If you're looking for an affordable amplifier to add passive speakers to a Sonos setup, I highly recommend this one. Review: Great, efficient little amp - A nice little amp. Power consumption: With the supplied 32V 5A power supply, the unit consumes 1.7W while waiting for a signal and 3.7W when either bluetooth or RCA inputs are active. In normal use amp only pull about 3.7-4.0W - this is a big improvement over lots of my classic, older stereo gear that idles at 10-30W. It means I can leave it on 24/7 without worrying about the electricity bill and extra heat generated. I tried the 48V 5A power supply, and it seemed like it did make the sound a little tighter, especially in the bass. But, I did not control for volume so it's possible it was just louder. With the 48V supply, the unit draws 3W when waiting for signal and 7.8W with the output amplifiers on. With the 7.8W of idle consumption, the unit gets quite warm to the touch, and the consumption starts to approach more-featured receivers. I swapped back to the 32V power supply as I intend to run this near-24/7 so energy costs are important. Bluetooth sounds good and is my main use case for this system, but I'm not that picky. I haven't done super critical nearfield testing, but it sounds great filling a large room with a pair of old floorstanders. The two-band EQ is very useful, and is largely why I picked this particular amp. With my big old speakers it works great to tame the rumble a bit and add some sparkle back in. It's kind of annoying that the Treble knob is to the left of the Bass knob, which is backwards from basically every single other amp out there. That's only noticeable from up close though. Power and Gain: The amp's power is good. If you feed it a powerful signal the amp will give you more than enough volume. Bluetooth signal level is high and the RCA input is fine for anything modern that's mixed loud. I only checked for a few seconds but this amp gets way louder than I would ever need. The gain is just OK. I think it's pretty standard as far as amps go. It's still a little bit disappointing because it's hard to get a program with low signal level loud enough. It would be nice if there was a little more gain on tap or a low gain/ high gain switch. I'm debating getting a preamp to put in front of it. Overall I think it works great, looks great, and it's been powered on playing music pretty much 24/7 since I got it ## Features - 300 Watts x 2 Power Output: The TI TPA3255 chip amplifier has a feedback design and high-speed gate driver error connection for efficient and quality audio performance, with a low idle loss of <2.5W - High-Efficiency: The chip amplifier has replaceable Op-Amps for a custom approach when compared to the BT20A amplifier. Further, you can swap the 2 plug-in NE5532 Op-Amps for LME49720HA, MUSES02, OPA2604AP, OPA2134PA, LM4562, or NJM4556AD Op-Amps to achieve distinct sound qualities. It boasts an SNRβ‰₯108dB and THD≀0.005% - Bluetooth 5.0 Connectivity: The Bluetooth pair can be removed by pressing and holding the volume control for 5 seconds, and it also has a memory function for easy pairing and an alert tone for convenience - Custom Sound with Bass and Treble Controls: The BT20A Pro home audio amplifier has a sound control design so that you can experience sound without effects by setting treble and bass effects to the middle point - Package Contents: The package contains a BT20A Pro power amplifier, a Bluetooth antenna, a 32V/5A power adapter, an AC cord, and a user manual ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07JVFY27T | | Best Sellers Rank | #2,223 in Electronics ( See Top 100 in Electronics ) #4 in Audio Component Amplifiers | | Brand | Fosi Audio | | Built-In Media | BT20A Pro Bluetooth Amplifier x1, 32V 5A Power Adapter x1, User Manual x1 | | Customer Reviews | 4.5 out of 5 stars 3,039 Reviews | | Item Weight | 567 g | | Manufacturer | Fosi Audio | | Mfr Part Number | BT20A Pro | | Model Number | BT20A PRO | | Number of Items | 1 | | Unit Count | 1 Count | ## Product Details - **Item dimensions L x W x H:** 5.59 x 4.21 x 0.16 inches - **Manufacturer:** Fosi Audio - **Maximum Supply Voltage:** 32 Volts (DC) - **Minimum Supply Voltage:** 32 Volts (DC) - **Voltage:** 32 Volts ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/61ne1lo34ML.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect companion for my Sonos Port *by X***S on August 3, 2026* I bought this amplifier to pair with my Sonos Port so I could use a set of Yamaha outdoor speakers, and it's been exactly what I was looking for. Setup was quick, and everything worked perfectly right out of the box. The sound is clean, powerful, and distortion-free, even when turning up the volume outdoors. I also like the compact design, it looks modern and doesn't take up much space in my media cabinet. I've had zero issues with it since installing it. If you're looking for an affordable amplifier to add passive speakers to a Sonos setup, I highly recommend this one. ### ⭐⭐⭐⭐⭐ Great, efficient little amp *by A***E on July 6, 2026* A nice little amp. Power consumption: With the supplied 32V 5A power supply, the unit consumes 1.7W while waiting for a signal and 3.7W when either bluetooth or RCA inputs are active. In normal use amp only pull about 3.7-4.0W - this is a big improvement over lots of my classic, older stereo gear that idles at 10-30W. It means I can leave it on 24/7 without worrying about the electricity bill and extra heat generated. I tried the 48V 5A power supply, and it seemed like it did make the sound a little tighter, especially in the bass. But, I did not control for volume so it's possible it was just louder. With the 48V supply, the unit draws 3W when waiting for signal and 7.8W with the output amplifiers on. With the 7.8W of idle consumption, the unit gets quite warm to the touch, and the consumption starts to approach more-featured receivers. I swapped back to the 32V power supply as I intend to run this near-24/7 so energy costs are important. Bluetooth sounds good and is my main use case for this system, but I'm not that picky. I haven't done super critical nearfield testing, but it sounds great filling a large room with a pair of old floorstanders. The two-band EQ is very useful, and is largely why I picked this particular amp. With my big old speakers it works great to tame the rumble a bit and add some sparkle back in. It's kind of annoying that the Treble knob is to the left of the Bass knob, which is backwards from basically every single other amp out there. That's only noticeable from up close though. Power and Gain: The amp's power is good. If you feed it a powerful signal the amp will give you more than enough volume. Bluetooth signal level is high and the RCA input is fine for anything modern that's mixed loud. I only checked for a few seconds but this amp gets way louder than I would ever need. The gain is just OK. I think it's pretty standard as far as amps go. It's still a little bit disappointing because it's hard to get a program with low signal level loud enough. It would be nice if there was a little more gain on tap or a low gain/ high gain switch. I'm debating getting a preamp to put in front of it. Overall I think it works great, looks great, and it's been powered on playing music pretty much 24/7 since I got it ### ⭐⭐⭐⭐⭐ Amazing Clean Powerful Streaming *by P***R on August 27, 2025* I admit that I have little knowledge of audio And electronics. I thought 300 watts of audio power had to come from a big heavy expensive amp. My new house came with 8 ceiling speakers . I had no idea whether they worked or sounded decent. The previous owner left an AVX speaker selector next to a bunch of speaker wires that were coming out of a wall port. I called Cambridge Audio and an advisor told me I would need to buy an amp costing at least $600 to run the speakers. Since I had no idea how it would sound , i looked on Amazon for an alternative. I took a chance on this tiny inexpensive Fosi amp to see if the setup even worked. It turns out that 3 of the 4 zones work and each sounds great using my phones Bluetooth and Apple Music through the Fosi into the speaker selector . I am being cautious with this setup , but I have determined that I can definitely power three zones simultaneously at rockin’ volume. The bass is not earth shaking , but is ok. I am amazed at the sound . Since the speaker selector has an impedance protector switch, I am relatively certain that I will be able to run 3 zones simultaneously without blowing out the speakers. I think the Fosi Amp is great . I am not audiophile and have reasonable expectations. The amp has an 18 month warranty. It is tiny and the Bluetooth is so strong that I do not have to leave my phone next to the amp. I highly recommend this tiny Bluetooth 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? - 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.no/products/85729159-fosi-audio-bt20a-pro-bluetooth-5-0-amplifier-300w-x2](https://www.desertcart.no/products/85729159-fosi-audio-bt20a-pro-bluetooth-5-0-amplifier-300w-x2) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-10-19*