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Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp 2.0 CH for Home Speakers 100W x 2 with Bass and Treble Control TPA3116 (with Power Supply)

4.5 4.5 out of 5 stars 7,994 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Audio Component Amplifiers by Fosi Audio

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Purchase options and add-ons

Item Dimensions LxWxH 5.2 x 3.54 x 1.42 inches
Voltage 220 Volts
Manufacturer Fosi Audio
Brand Fosi Audio
Number of Channels 2

About this item

  • 2 Channel Amplifier: The BT20A Mini Bluetooth amplifier home audio offers both Bluetooth and RCA inputs, along with passive speaker outputs. This versatile amplifier enables you to build a high-quality 2.0-channel audio system, allowing seamless connections to your phone, computer, tablet, and more.
  • Bass and Treble Control: The Fosi Audio BT20A stereo amplifier is tailor-made for audiophiles seeking exceptional HiFi sound quality. You have control over the sound of your bookshelf speakers through music or video software, fine-tuning the bass and treble to your preferences.
  • Bluetooth 5.0 Amplifier: Featuring two Texas Instruments TPA3116D2 chips, the BT20A delivers powerful and clear stereo sound. The TPA3116D2 is a highly efficient digital amplifier with an advanced oscillator/PLL circuit, ensuring minimal interference and offering a robust connection range of up to 50 feet.
  • The Ideal Partner Amplifier For Speakers: With an impressive 100W RMS per channel at 4 ohms, 20 Hz - 20 kHz, and only 0.04% THD, the BT20A Bluetooth amp is a powerhouse. It comes with a 24V power supply and can drive speakers with a capacity of 280 watts at 8 ohms or 320 watts at 4 ohms. (for passive speakers only, not the powered speakers)
  • What You'll Get: BT20A stereo audio amplifier receiver x1, 24V/4.5A power supply x1, User Manual x1, a 24-month worry-free warranty and responsive customer service.
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Important information

Safety Information

Please plug the power cord into the amp THEN the wall.


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Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp 2.0 CH for Home Speakers 100W x 2 with Bass and Treble Control TPA3116 (with Power Supply)
Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp 2.0 CH for Home Speakers 100W x 2 with Bass and Treble Control TPA3116 (with Power Supply)
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Price$79.99$58.99$79.99$99.99$79.99$9.99
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Tuesday, Apr 2
Customer Ratings
Value for money
4.6
4.1
4.4
4.7
5.0
Sound quality
4.5
4.3
4.5
4.5
4.7
Volume control
4.6
4.3
4.6
4.6
Sold By
Fosi Audio
HIFI College
Hifi Made Fun
Yima Top
Yima Top
Fosi Audio
number of channels
2
2
2
2
2
voltage
220 volts
24 volts
110 volts
230 volts
230 volts
3 volts
mounting type
Surface Mount
Speaker
Tabletop

Product guides and documents

What's in the box

  • Quick Start Guide

  • Product Description

    Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp
    Stream Hi-Fi Music to Your Stereo System

    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, manufacture, and sell many Hi-Fi audio products on the market. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio products.

    Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp
    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

    Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp

    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!

    Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp

    24V/4.5A Power Supply

    Fosi Audio BT20A equip with an energy-efficient and stable power supply can get an astonishing sound.

    Comparison

    Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver

    BT20A

    Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver

    BL20A

    Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver

    V3

    Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver

    BT30D

    Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver

    BL20C

    Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver

    TB10D

    Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel Mono Amp

    ZA3

    Customer Reviews
    4.5 out of 5 stars
    7,994
    4.4 out of 5 stars
    572
    4.5 out of 5 stars
    506
    4.5 out of 5 stars
    2,443
    4.6 out of 5 stars
    781
    4.5 out of 5 stars
    835
    4.4 out of 5 stars
    79
    Type
    Bluetooth 2.0 CH Amp Bluetooth 2.1 CH Amp 2.0 CH Amp Bluetooth 2.1 CH Amp Bluetooth 2.1 CH Amp 2.0 CH Amp 2.0 CH Mono Amp
    MAX Power Output
    100W x 2 100W x 2 300W x 2 50W x 2+100W 160W x 2 300W x 2 190W x2/ 300W x1
    Input
    Bluetooth + RCA Bluetooth + 3.5mm AUX + U-disk RCA Bluetooth + RCA Bluetooth + RCA + U-disk RCA RCA+XLR+¼”TRS
    Output
    Passive Speakers Passive/Active Speaker+Sub/Amp Passive Speakers+Pre-Out Passive Speaker/Sub+Active Sub Passive Speakers + Active Sub Passive Speakers Passive SPK +Sub-out
    Treble & Bass Control
    THD
    ≤ 0.04% ≤ 0.001% <0.003% ≤ 0.04% ≤ 0.05% ≤ 0.3% <0.006%
    SNR
    ≥ 98dB ≥ 92dB ≥110dB ≥ 98dB ≥ 98dB ≥ 90dB ≥106dB
    Terminating Impedance
    2-8 Ohm 2-8 Ohm 2-8 Ohm 2-8 Ohm 2-8 Ohm 2-8 Ohm 2-8 Ohm
    Power Adapter
    24V/4.5A 24V/4.5A 32V/5A 24V/4.5A 24V/4.5A 32V/5A 48V/5A
    Work Voltage
    AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V

    Looking for specific info?

    Product information

    Warranty & Support

    Product Warranty: For warranty information about this product, please click here

    Feedback

    Fosi

    Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp 2.0 CH for Home Speakers 100W x 2 with Bass and Treble Control TPA3116 (with Power Supply)


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    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    7,994 global ratings

    Customers say

    Customers like the Bluetooth connectivity, size, power, quality and performance of the electronic component amplifier. For example, they mention that it takes up so little space, it sounds great and that it puts out enough power to push the speakers to the point of being loud. That said, some complain about the Bluetooth connection and say it's dependable.

    AI-generated from the text of customer reviews

    904 customers mention744 positive160 negative

    Customers like the sound quality of the electronic component amplifier. They mention that it has great sound, good volume, and nice controls. Some appreciate the BT20A's total silence when it's not linked to the Echo. They also say that it gets loud and is a great device for playing music in a small house or living room.

    "...I hooked this up to a pair of Definitive Pro Monitor 1000's and they sound amazing...." Read more

    "...with high power output to deliver crystal clear, rich, and detailed sound to your speakers...." Read more

    "...setup is flexible, doesn't require a remote control, and sounds terrific for the setting...." Read more

    "...one thing i really like is the bluetooth addition. the sound quality is good and there is very little spurious noise...." Read more

    577 customers mention496 positive81 negative

    Customers like the performance of the electronic component amplifier. For example, they say it works well with a good quality transmitter, it's quite good overall, and the output is fantastic. That said, some say it'd do a great job in a dorm room, desktop near field, and like. Overall, customers are satisfied with the build quality and overall performance of this small amplifier.

    "...But what truly sets the Fosi Audio BT20A apart is not just its superb performance and compact design; it's the company's exceptional commitment to..." Read more

    "...This would do a great job in a dorm room, desktop near field, and the like...." Read more

    "TL;DR: This works exactly as it should. Great piece of equipment is such a tiny form factor..." Read more

    "...Now I can use nice passive speakers with my computer. Works like a champ." Read more

    569 customers mention417 positive152 negative

    Customers like the bluetooth connectivity of the electronic component amplifier. They say the connection is a snap, dependable, and fast. Some mention that the Bluetooth function is easy to use and there are no issues pairing or reconnecting with their iPhone or turntable.

    "...This amp is everything I needed and nothing more. The Bluetooth option is cool and was very easy to connect to, but I'm primarily wired to my..." Read more

    "...If you're seeking a small, powerful, and reliable Bluetooth amplifier, I wholeheartedly recommend the Fosi Audio BT20A. It may be small in size, but..." Read more

    "...one thing i really like is the bluetooth addition. the sound quality is good and there is very little spurious noise...." Read more

    "...The amp's bluetooth capabilities aren't great - the signal cuts in/out even when it's close to the source (my iMac or laptop) - but my turntable has..." Read more

    448 customers mention406 positive42 negative

    Customers are satisfied with the power of the amplifier. They mention that it gets loud, sounds clean, and puts out decent power. Some say that the amp is awesome and that it's small, but packs a punch. Overall, most are happy with the performance and value of the product.

    "...For a simple setup like this, this amp is perfect." Read more

    "...If you're seeking a small, powerful, and reliable Bluetooth amplifier, I wholeheartedly recommend the Fosi Audio BT20A. It may be small in size, but..." Read more

    "...This would offer multiple inputs with the ability to power any speakers and, for study time, headphones. Where was this stuff years ago?" Read more

    "I am driving 1989 Bose Acoustamass speaks. They are high impedance so sound quality is fantastic but limited high volume...." Read more

    308 customers mention240 positive68 negative

    Customers like the quality of the electronic component amplifier. They say it has a great build quality, solid and tight bass, smooth highs that can sparkle a little, and is reliable. Customers also say it's a small, reliable, and cost-effective solution for wireless or PC stereo. They also say the amplifier is an excellent component for their home office and more than adequate for their needs.

    "...The Bluetooth connection is smooth and reliable, extending a generous range that grants you the freedom to roam while maintaining control over your..." Read more

    "...i wish it were closer to a $60 price point but build quality seems good and sound quality overall is great for this little guy...." Read more

    "...The damping factor (ability to control bass) is solid. Very tight bass from the 6” Niles...." Read more

    "...The amp's bluetooth capabilities aren't great - the signal cuts in/out even when it's close to the source (my iMac or laptop) - but my turntable has..." Read more

    301 customers mention284 positive17 negative

    Customers find the instructions for the electronic component amplifier to be super easy. They say it takes only 10 minutes to set up, pair, and connect via Bluetooth. Customers also mention that the small metal box is simple and nice.

    "...The Bluetooth option is cool and was very easy to connect to, but I'm primarily wired to my computer...." Read more

    "...The Fosi is definitely a very simple unit with no frills however it delivers far better than my expected at this price point...." Read more

    "Safice to say.. sound quality, volume, ease of set up and price exceded my expectations for such small powerful unit...." Read more

    "Easy to set up. Connects to Bluetooth and can play from phone, tv or IPad. Great sound!" Read more

    262 customers mention248 positive14 negative

    Customers are satisfied with the size of the electronic component amplifier. They mention that it has plenty of power, a compact design, and is great space saver. Some say that the amp fits in the palm of their hand and that it nicely sits on a small shelf. Overall, customers are happy with the quality and size of this product.

    "...the Fosi Audio BT20A apart is not just its superb performance and compact design; it's the company's exceptional commitment to customer satisfaction...." Read more

    "...It's super compact but solidly built. If you don't need the amp for bluetooth, I don't think you can go wrong with this little guy." Read more

    "...Small size was great, easy to hide, and it seems to have plenty of power...." Read more

    "...This little amp has all that and takes up very little space and powers the speakers with ease...." Read more

    239 customers mention233 positive6 negative

    Customers like the value of the electronic component amplifier. They mention that it's an incredible value for the money, affordable, and well worth it. Customers also say that it works well and sounds good, making it a solid low cost setup that takes very little space.

    "...Highly recommend this product: very inexpensive, does exactly what it is supposed to and greatly enhances the flexibility of what you can do." Read more

    "...It’s a great amp for the money and if you have a small set up. Would definitely recommend" Read more

    "...buying the BT20A. All in all, the Fosi BT20A is a winner -- and a great value. Highly recommended!" Read more

    "...Pretty good for the money, but not acceptable if you’re a true audiophile." Read more

    Sounds great!
    5 Stars
    Sounds great!
    For being how small it is it sounds great. The Bluetooth function is really easy to use, just select on your phone and that’s it. It’s a great amp for the money and if you have a small set up. Would definitely recommend
    Thank you for your feedback
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    Top reviews from the United States

    Reviewed in the United States on January 15, 2024
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    5.0 out of 5 stars Awesome Value and Quality
    Reviewed in the United States on January 15, 2024
    I had some extra bookshelf speakers laying around and wanted higher quality sound for my office computer. This amp is everything I needed and nothing more. The Bluetooth option is cool and was very easy to connect to, but I'm primarily wired to my computer. I hooked this up to a pair of Definitive Pro Monitor 1000's and they sound amazing. With my computer volume at 100, I can only run the amp volume at about 1/3 before the speakers vibrate off my desk. For a simple setup like this, this amp is perfect.
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    2 people found this helpful
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    Reviewed in the United States on May 20, 2023
    10 people found this helpful
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    Reviewed in the United States on February 22, 2024
    Reviewed in the United States on September 2, 2022
    6 people found this helpful
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    Reviewed in the United States on March 19, 2024

    Top reviews from other countries

    Translate all reviews to English
    Mo M.
    5.0 out of 5 stars WOW!
    Reviewed in Canada on December 6, 2023
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    Mo M.
    5.0 out of 5 stars WOW!
    Reviewed in Canada on December 6, 2023
    Hands down this is one of my favorite amps to use. From the compact design, east of use, and power. It certainly offers a lot of value. The Bluetooth connects consistently each and every time, something that I often found a challenge with similar products.

    The audio quality is fantastic out of a small package. Whatever I throw at it, it just handles it. Be it my customer built enclosures or my reference Klipsch speakers. The connectively makes it easy to get up and running in no time without any hassle.

    Highly recommend for anyone wanting to add Bluetooth functionally in there space or wanted a tiny amp for some bookshelf speakers. This is the one!
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    marex77
    5.0 out of 5 stars Works Good
    Reviewed in India on March 25, 2024
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    marex77
    5.0 out of 5 stars Works Good
    Reviewed in India on March 25, 2024
    I have been using this amplifier for a month now. It is working without any issues. The build quality of the amp as well as the adapter is very good. Looks tiny besides my old amp.

    My Old amp stopped working so am using this amplifier as an temporary alternative to power a set of Solidaire SS100 bookshelf speakers with a 12-inch woofer, a 4-inch midrange, and a 1-inch horn tweeter with impedance of 8 Ohms.

    Bluetooth range is also good. Comparable to my existing Logitech Bluetooth adapters.

    I have noticed it does not get warm on long usage when listening at acceptable volumes at home.

    The audio quality is flat and commendable in the Fosi amp, but I seem to miss the warmth my old Solidaire AS1200D amp provided. So, I tend to boost the lows and mids from the equalizer to get the desired effects.

    My decision on buying this over Aimyia amp was swayed because FOSI provide a warranty on their product, but Aimyia brand amps have no such mention in their listings.
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    Technik Nerd
    5.0 out of 5 stars Kompakt, Leistungsstark, tolle BT-Verbindung
    Reviewed in Germany on March 11, 2024
    Christopher Åkesson
    5.0 out of 5 stars Riktigt bra
    Reviewed in Sweden on February 20, 2024
    giannino
    5.0 out of 5 stars Amplificatore di ottima qualità
    Reviewed in Italy on December 27, 2023
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    giannino
    5.0 out of 5 stars Amplificatore di ottima qualità
    Reviewed in Italy on December 27, 2023
    Ho preso questo mini amplificatore per le casse che uso con il mio PC, una coppia di Wharfedale Diamond 10.SR. Ne esce un suono pulitissimo, cristallino. Ottima anche la resa lato potenza, anche a volume molto alto non c'è traccia di distorsione, i bassi rimangono pieni e ben definiti.
    Insomma un'ottima accoppiata. Il trasformatore è un pò ingombrante ma visti i watt di potenza che riesce ad erogare ci sta tutto.
    Complimenti alla Fosi Audio, un ottimo prodotto.
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