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Fosi Audio

Fosi Audio BL20A 200W Bluetooth 5.0 Home Audio Stereo Amplifier Hi-Fi Mini Class D Integrated Amp with U-Disk/3.5MM AUX/RCA Input and Remote Control for Home Passive Theater Speaker with Power Supply

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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon
Arrives Jul 23 – Jul 26
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Features

  • Fosi Audio BL20A 2.1 channel Bluetooth 5.0 power amplifier for home theater speaker systems can drive most home passive/powered/bookshelf/ceiling speakers. With 3.5MM AUX output, BL20A can connect to passive speakers and powered speakers simultaneously. Or you can connect to an preamp through the 3.5MM output to build a simple sound system
  • 3 Input Modes: BL20A support Bluetooth, RCA, U-Disks and 3.5MM AUX input with bass, treble, volume and remote control, compatible with most latest device. Utilizes Bluetooth 5.0 technology for seamless device linking and a 50ft connection range. A new generation class D amplifier give you the ultimate Hi-Fi music experience
  • BL20A Adopt 2PCS Texas Instruments TPA3116 poewr amplifier chips digital amplifier power stage for driving speakers up to 100W / 2 Ω in mono channel, MAX power output up to 200Watts. The TPA3116 are fully protected against faults with short-circuit protection and thermal protection as well as overvoltage, undervoltage, and DC protection. Faults are reported back to the processor to prevent devices from being damaged during overload conditions PCB to be used across different power levels
  • Mini and Elegant Design: Small and compact aluminum alloy body(Size: 5.2x3.54x1.42 inches), easy to set up, this audio component amplifier is a great choice to your home audio stereo systems
  • What you Get: BL20A Power Amplifier x1, Power Adapter x1, AC Cord x1, User Manual x1

Features

  • Fosi Audio BL20A 2.1 channel Bluetooth 5.0 power amplifier can drive most home passive/powered/bookshelf/ceiling speakers. With 3.5MM AUX output, BL20A can connect to passive speakers and powered speakers simultaneously. Or you can connect to an preamp through the 3.5MM output to build a simple sound system.
  • 3 Input Modes: BL20A support Bluetooth, RCA, U-Disks and 3.5MM AUX input with bass, treble, volume and remote control, compatible with most latest device. Utilizes Bluetooth 5.0 technology for seamless device linking and a 50ft connection range. A new generation class D amplifier give you the ultimate Hi-Fi music experience.
  • BL20A Adopt 2PCS Texas Instruments TPA3116 poewr amplifier chips digital amplifier power stage for driving speakers up to 100W / 2 in mono channel, MAX power output up to 200Watts. The TPA3116 are fully protected against faults with short-circuit protection and thermal protection as well as overvoltage, undervoltage, and DC protection. Faults are reported back to the processor to prevent devices from being damaged during overload conditions PCB to be used across different power levels.
  • Mini and Elegant Design: Small and compact aluminum alloy body(Size: 5.2x3.54x1.42 inches), easy to set up, this audio component amplifier is a great choice to your home audio stereo systems.
  • What you Get: BL20A Power Amplifier x1, Power Adapter x1, AC Cord x1, User Manual x1, 18-month worry-free warranty, and friendly customer service.

Description

Our Story 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, manufacture, and sell many Hi-Fi audio products on the market. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio audio products NOW! Mini Bluetooth 5.0 Power Amplifier Product Parameters: Input: Bluetooth/3.5MM AUX/U-Disk Output: Passive Speaker Output + 3.5MM AUX Pre-out (Passive Speakers, Powered Speakers or subwoofer, Power Amplifier) SNR: ≥ 92dB, THD: ≤ 0.001% DC Input Range: DC 12-24V U-Disk Capacity: MAX 32GB Support Format: MP3/WMA/APE/ FLAC/WAV Max Power Output: 100watt ×2 2 Channel Power Amp: BT10A, BT20A, TB10A, TB10D, V1.0G, TDA7498E, ZK-1002, ZK-502T. 2.1 Channel Power Amp: BT30A, BT30D, BT30D Pro, BL20A, BL20C, ZK-TB21. DAC: Q4. DAC Amplifier: DA2120A, DA2120C. Subwoofer Amp: TP-02, M01-BT, M02, M03, M04. Phono Preamp: BOX X1, Box X2, BOX X3, BOX X4. Tube Preamp: P1. Tube Headphone Amplifier: T20, T20X, P2. Read more U-Disks Playback Support MP3/WMA/APE/FLAC/WAV and other lossless audio formats, U disk capacity up to 32GB. The sound quality is pure, clear, and delicate. Plug and play at any time to enjoy the solid and non-destructive sound quality. Individual Adjustment of Treble and Bass BL20A Bluetooth 5.0 stereo amplifier supports MP3/WMA/APE/FLAC/WAV and other lossless audio formats, U-disk's capacity is up to 32GB. The sound quality is pure, clear, and delicate. Plug and play at any time to enjoy the solid and non-destructive sound quality. 3.5MM AUX INPUT and PRE-OUT BL20A can connect to passive speakers by banana plugs or a bare wire. Meanwhile, you can connect to power speakers or subwoofer, a power amplifier by 3.5MM AUX PRE-OUT, easy to build your home audio system. Read more Adopting 2PCS T1 TPA3116 Chips High-performance Texas Instruments (TI) TPA3116D2 chip presents exciting sound effects. The essence of the sound is truly restored, resulting in extraordinary clarity. Multiple Input Modes A variety of input and output modes and application scenarios are even more different, and remote control is also included to meet your remote operation. Upgraded DC Outlet The old version or other brand amplifiers sparks flying when the power supply plugin, it's unsafe. With a built-in power protection circuit, there are no sparks flying when you plug the power adapter into the amplifier. Safe for use! Read more BL20A BL20C BT30A BT30D DA2120A T3 Type Bluetooth 2.1 CH Amp with Remote Control Bluetooth 2.1 CH Amp Bluetooth 2.1 CH Amp Bluetooth 2.1 CH Amp Bluetooth DAC 2.1 CH Amp with Remote Control Bluetooth Tube 2.1 CH Amp MAX Power Output 100W x 2 160W x 2 50W x 2+100W 50W x 2+100W 50W x 2 50W x 2 Input Bluetooth + 3.5mm AUX + U-disk Bluetooth + RCA + U-disk Bluetooth + RCA Bluetooth + RCA Bluetooth 5.0 + 3.5mm AUX + PC-USB + Optical + Coaxial Bluetooth + 3.5mm AUX1+3.5mm AUX2 Output Passive Speakers + Active Speakers/Amplifier/Active Subwoofer Passive Speakers + Active Subwoofer Passive Speakers + Passive Subwoofer Passive Speakers+Active/Passive Subwoofer Passive Speakers + Active Subwoofer Passive Speakers + Active Subwoofer+ Headphone Treble & Bass Control ✓ ✓ ✓ ✓ ✓ ✓ THD ≤ 0.001% ≤ 0.05% ≤ 0.04% ≤ 0.04% ≤0.01% ≤ 0.1% SNR ≥ 92dB ≥ 98dB ≥ 98dB ≥ 98dB ≥105dB ≥ 80dB Terminating Impedance 2-8 Ohm 2-8 Ohm 2-8 Ohm 2-8 Ohm 2-8 Ohm 4-8 Ohm Power Adapter 24V/4.5A 24V/4.5A 24V/4.5A 24V/4.5A 24V/4.5A - Work Voltage AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V


Product Dimensions: 4.72 x 3.54 x 1.18 inches


Item Weight: 1.94 pounds


Item model number: bl20a-1


Date First Available: March 6, 2019


Manufacturer: Fosi Audio


Country of Origin: China


Item dimensions L x W x H: 4.72 x 3.54 x 1.18 inches


Voltage: 24 Volts


Manufacturer: Fosi Audio


Maximum Supply Voltage: 24 Volts (DC)


Mounting Type: Freestanding


Item dimensions L x W x H: 4.72 x 3.54 x 1.18 inches


Voltage: 24 Volts


Manufacturer: Fosi Audio


Maximum Supply Voltage: 24 Volts (DC)


Mounting Type: Freestanding


Brand: Fosi Audio


Number of Channels: 2


Output Power: 2E+2 Watts


Package Type Name: box


Specification Met: FCC


Product Dimensions: 4.72 x 3.54 x 1.18 inches


Item Weight: 1.96 pounds


Item model number: BL20A


Date First Available: March 6, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jul 23 – Jul 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Great audio device
I love this enough that I bought a second one. I have one set up in my exercise room and one in the living room. This model allows for an external amp, so it has a pre out port for that purpose. The Bluetooth is reliable and long range. The sound is excellent. It comes with a remote, but I haven't used it. You can directly connect unpowered speakers, but I haven't used it in that way. I have both of them connected to an amp. That requires the purchase of an aux to RCA cable. No cables are included in the package other than power. The buttons are pretty straight forward. You do a long press of the power/volume button to turn it on, and a second short press to set it to Bluetooth mode. I have zero complaints with this. It's an excellent purchase given the capabilities for the price. ... show more
Reviewed in the United States on May 11, 2026 by Todd
    • Great little amplifier with lots of power
This is my second Fosi amplifier. My first purchase is being used in my bedroom to power a pair of old Bose 501 speakers. It sounds great and there is plenty of power from such a small amplifier. It's easy to use and the Bluetooth pairing works great. This newer model is now installed in my kitchen cabinets powering a pair of Polk in-wall speakers that I just finished installing in the soffit above the cabinets, one at each end. The stereo separation is fantastic and again, this little amp has some excellent power. Very pleased as it was inexpensive and well worth the money. ... show more
Reviewed in the United States on May 29, 2026 by Five 28
    • Modest price..good performance
It is a small mini amp. Easy to connect to passive speakers via banana plugs or raw speaker wire. The amp performs well with my Beovox speakers, and is easy to control. Nice bass control with not much distortion to my untutored ear. Good value. Correction: banana plugs don't work. Raw speaker wire does/ ... show more
Reviewed in the United States on June 3, 2026 by downscote
    • Amazing little amplifier
This little amp is truly amazing. It sounds great, packs plenty of power, and has a bunch of nice (and usable) features. I paired it with some older Yamaha 3-way speakers (6 inch woofers plus 4 inch mids and small dome tweeters) and the sound is remarkable. The treble/bass controls are very responsive and give a wide range of tone control. The remote is designed to work with the amp seamlessly, much more than some other amps which have more generic remotes. I had one issue (see next paragraph) for which I contacted Fosi tech support, and I found them to be very responsive and committed to providing any and all support I needed. (Vivian in Fosi support was particularly helpful). In all, this amp is a real treasure. The only issue I had was trying to play WAV files from a flash drive via the amp’s U-disk interface. MP3 files play perfectly, but the amp didn’t seem to recognize WAV files. The amp has a size limit of 100mb for U-disk files, but that was not a problem. After working with Fosi tech support and trying several things, it turned out that the amp was not recognizing my WAV files as such. So I used a file conversion utility to convert my WAV files to WAV format (I know that might sound crazy but it was worth trying). The new resulting WAV files were about 25-30 percent smaller than the original WAV files, and more importantly, the Fosi amp recognized them as WAV format and plays them perfectly. I include this in the review in case someone has the same issue. This was not a deal breaker, in any event. In summary, I am 100% satisfied with this amp, and can recommend it. ... show more
Reviewed in the United States on May 12, 2024 by AgelessExplorer
    • Perfect replacement for Cambridge Soundworks Model 12 amp. Great value and sound. Perfect replacement for Cambridge Soundworks Model 12 amp. Great value and sound.
Review Image by ElSurDeTejas
Review Image by ElSurDeTejas
You can't beat it for value or performance. I replaced a failing Cambridge Soundworks amplifier with this. Importantly; THIS kit comes with a power adapter (24v, 4.5a) of sufficient voltage and current to get max power out of the amp. 12-19 volts will not do it. Performance is significantly beyond what the Cambridge could do as to power, control, bass extension, and ability to play at max volume without sounding strained. This system was designed to run off a small 10wpc amp with 20 for the subwoofer. So, the satellites are ok but it'll absolutely overdrive the sub and bottom it out without judicious control of the sub volume. Which you can do! Because not only can you control the sub volume you can control the low pass frequency for the sub! Supposedly there's a switch inside the amp to allow the satellites to run full range but I don't see a reason to do so. High pass does not seem to vary along with the sub low pass. Sound quality is way beyond what I expected. It is not in the same class as a cheap LePai class T. It's very clean and musical. Extremely engaging to listen to especially on such a small portable system. No small Bluetooth speaker can match the impact of a real woofer and the amp drives it well. It's not going to push a monster 10" or 12" car sub. You need a sub/woofer that is fairly high efficiency as opposed to high power handling and max SPL. This is why the Cambridge system is perfect. At max volume it's a bit grainy up top and you can hear the amp go into mild dynamic compression but it never distorts unless the bass tone control is turned up. Use the sub volume instead. Bluetooth works great. No PIN pairing just scan pick and go. Must disconnect Bluetooth to use the aux input unfortunately but it's easy enough to do. Sound is not diminished that I can tell when using Bluetooth. I just got it tonight so I will update later. ... show more
Reviewed in the United States on August 13, 2020 Reviewed in the United States on August 13, 2020 by ElSurDeTejas
    • Amazing little amp! Amazing little amp!
Review Image by JeRom
Review Image by JeRom
Excellent amp! We hooked it up to a mixer that brings audio from a variety of sources, including Alexa, phono record player, music instruments (drums, guitar, keyboard, mic), our home theater and miriads of personal devices via Bluetooth. I am genuinely surprised at the quality of this amp! Regardless of the sources it does very good job and helps my good 125w speakers sound really great. Because my speakers' impedance is 8 Om the amp power output is somewhere around 50W, as I understand, not full capacity, but this is plenty for my living room. I liked it so much, I even bought a second amp by FOSI, a different model, for my children. There are couple of things I would consider before you buy this model: 1) do you intend to use it with a separate subwoofer? If not, you might want to find a different FOSI amp that doesn't have subwoofer outlet and 2 extra controls (that means less knob controls to mess with). 2) If you plan to switch between devices via Bluetooth often, say you have many family members who are going to hook their phones up to showcase something like the newest single of Tones and I - Dance Monkey, then you might want to look for another model, because this amp doesn't have a dedicated switch for the Bluetooth and you will have to interrogate everyone in your house, trying to figure out what device was last connected to the amp. If you don't find that last device and disconnect from it, you won't be able to connect yours. There is no way to turn off Bluetooth on this amp without switching the power off, but that won't help, because your last connected device will automatically connect and you are back in the interrogation room. 3) Volume control knob. It is very small and too close to other controls. Not a problem for me, because I can control through mixer. Those of you not blessed with very delicate fingers - you will struggle with the volume control. 4) I am not sure if this is my problem or the amp or Google's, but I could not figure out how to connect Google Mini to the amp via Bluetooth. It seems like Google Mini does not want to add amp as a Bluetooth device even though it sees the connection. Just FYI. 5) no DAC technology. I don't know if this is very important for you. I guess if you are going to listen to inadequate quality mp3 files, you might need digital to analog conversion to improve sound quality, but who does it these days anyway, use streaming music in high quality compression and delete those old files. Otherwise, it is a great little amp that I never turn off, so I can communicate with artaficial intelgence (Alexa) and let the music fill the room on voice request. ... show more
Reviewed in the United States on March 13, 2020 Reviewed in the United States on March 13, 2020 by JeRom
    • Failed after a short time.
I purchased this about 8 months ago, It was used on and off, mostly weekends. Low to med. Vol. I researched this product and purchased it because it seemed to fit my needs and I thought the quality would be good as there's tons of cheap priced amps out there. It just didn't hold up, I went to turn it on and no Led power light, No power from the amp. I checked the PS @ 24v, good. No fuse's, unless its on the Board itself. So it's dead. I hate writing neg. remarks folks but what else can I say. Plus there is NO way this is 200 watts, or maybe I should say sounds like it. Not that I needed it but that's how it's advertised. I've owned receivers and amps. for decades rated at 1/2 of what this is supposed to be. This not even close. Overall, It didn't sound bad and yes for it's size it performed well. If your tight on space and need some sound then maybe this will work for you, hopefully you'll get more than a few months out if it. ... show more
Reviewed in the United States on December 14, 2025 by Tom
    • Multi talented audio in a small package, big value
Alrighty. I was looking for a replacement for my ancient cd player/boombox that lived in a tough environment: my garage. I like some tunes while washing and waxing.This piece of gear has what I need. A closed cabinet: no worries about dusty garages.... super Bluetooth connectivity and I can even connect my iPhone's lightning port to an Aux 3.5mm in with the right cable "iSkey [Apple MFi Certified] Aux Cord for iPhone, 3.5mm Aux Cable for Car Compatible with iPhone 14 13 12 11 XS XR X 8 7 6 iPad iPod for Car Home Stereo, Speaker, Headphone, Support All iOS Version". The Bluetooth is great, and, I can also simply use the above cord to connect my iPhone to the Fosi by cable. YRMV re the cable with a different phone platform. Now I load my lossless files on the phone, connect to the Fosi, adjust volume, bass & treble and let the music roll. The Fosi has less volume sensitivity or gain using the Aux input vs Bluetooth. Adjust the volume on your phone and the Fios up for the Aux, less volume is required for the Bluetooth. The device has a small footprint....I used some spare pegboard and made a platform for the unit to sit on and have it mounted right on the wall with the rest of the tools. It's wall wart hangs easily underneath with the miracle of zip ties. It has plenty of power for my small 8 ohm speakers. Even has a remote. This could be the heart of a great desktop setup as well. Stream internet radio on your phone and feed it to the Fosi. Its got it all. Enjoy. ... show more
Reviewed in the United States on May 2, 2024 by B-towner

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