Description
Revolutionize Your Audio Experience with the Fosi Audio BT20A Pro 2-Channel Bluetooth Power Amplifier for Speakers
Unleash Sonic Brilliance: 300 Watts x2 Power Output
Immerse yourself in unparalleled audio clarity with the Fosi Audio BT20A Pro. Boasting a formidable 300 Watts x2 power output, this amplifier redefines your listening experience. The cutting-edge TI TPA3255 chip, featuring an advanced feedback design and a proprietary high-speed gate driver error correction, ensures not only exceptional audio performance but also high power efficiency, with idle losses below 2.5W.
Enhanced Efficiency: Tailor Your Sound with Upgraded Op-Amps
Experience a new level of efficiency with the BT20A Pro. Upgradeable with plug-ins like SS3602, MUSES02, OPA2604AP, and OPA2134PA Op-Amps, the amplifier offers a customizable sound quality experience. Enjoy an impressive SNR≥108dB and minimal THD≤0.005%, setting the stage for an audiophile-grade sound journey.
Seamless Connectivity: Bluetooth 5.0 Unleashed
Immerse yourself in the world of wireless connectivity with Bluetooth 5.0. Clear pairing is at your fingertips—just press and hold the volume control for five seconds. The amplifier also boasts a Bluetooth memory function, making future connections a breeze. Stay connected and receive alerts with an audible tone, ensuring an uninterrupted audio experience.
Precision Sound Control: Craft Your Sonic Landscape
Tailor your audio landscape with the BT20A Pro's unique sound control features. Revel in a wide range of bass and treble controls, or balance them for an unadulterated, original sound. Whether you prefer enhanced bass, heightened trebles, or the purity of unaltered audio, this amplifier caters to your preferences.
What's in the Box: Everything You Need for Audio Excellence
Your purchase includes the BT20A Pro Power Amplifier, a Bluetooth Antenna, a 32V 5A Power Adapter (with a plug that matches your country of delivery), an AC Cord, and a comprehensive User Manual. Enjoy peace of mind with our worry-free 12-month warranty and our commitment to friendly customer service.
Elevate Your Audio Universe with the Fosi Audio BT20A Pro—Where Sound Excellence Meets Innovation.
Model: BT20A PRO
Output Power: 300Wx2 @4Ω
Terminating Impedance: 2-8Ω
Input Mode: Bluetooth + RCA
Output Mode: Passive Speakers + Pre-out
Frequency Range: 20Hz-20kHz(±1.2dB)
THD: ≤0.005%
SNR : ≥108dB
Chip Set: TPA3255
Bluetooth Transmission Distance: Up to 50Ft
Bluetooth Transmission Format: SBC/AAC
Device Dimension: 5x5x1 inches
DC Input Range: 24-48V
Power Supply: 32V 5A
Warranty Period: 1 Year
What‘s in the box?
BT20A Pro Power Amplifier x 1
Bluetooth Antenna x 1
32V 5A Power Adapter x 1
AC Cord x 1
User’s Manual x 1
Warranty Period: 1 Year from the date of Invoice
Covered: Manufacturing Defects Only
Warranty Form: https://www.theaudiostore.in/pages/warranty-claim-form
Cable: 1-month warranty only for manufacturing defects only
Fosi Audio is a dynamic brand dedicated to providing the most comprehensive range of Hi-Fi audio products in the market. We cater to passionate audiophiles by offering Hi-Fi products, DIY kits, and expert guidance, ensuring an immersive audio experience. Beyond a mere transaction, we foster enduring relationships with our clients, supporting them throughout their audio journey.
Our diverse product lineup includes the Hi-Fi power amplifier, pre-amplifier, headphone amplifier, DAC, music player, Bluetooth receiver, DIY board, DIY chassis, and an array of DIY kits. These meticulously crafted offerings embody our commitment to exceptional sound quality and innovation.
Established in China in 2017, Fosi Audio was founded by a team of devoted audiophiles. Our products have gained significant popularity within the Chinese DIY audio community, amassing a large and dedicated following. To expand our reach beyond borders, we launched this website in 2017 and began offering a selection of products on Amazon under the name "Fosi audio." However, please note that many of our outstanding products are not yet available on this website or Amazon. If you cannot find what you're looking for, simply reach out to us via email, and we will be delighted to assist you in finding the perfect product to meet your needs.
At Fosi Audio, we are not just a brand; we are your partner in achieving audio excellence. Join us on this immersive sonic journey and experience the true essence of Hi-Fi audio.

Description
Revolutionize Your Audio Experience with the Fosi Audio BT20A Pro 2-Channel Bluetooth Power Amplifier for Speakers
Unleash Sonic Brilliance: 300 Watts x2 Power Output
Immerse yourself in unparalleled audio clarity with the Fosi Audio BT20A Pro. Boasting a formidable 300 Watts x2 power output, this amplifier redefines your listening experience. The cutting-edge TI TPA3255 chip, featuring an advanced feedback design and a proprietary high-speed gate driver error correction, ensures not only exceptional audio performance but also high power efficiency, with idle losses below 2.5W.
Enhanced Efficiency: Tailor Your Sound with Upgraded Op-Amps
Experience a new level of efficiency with the BT20A Pro. Upgradeable with plug-ins like SS3602, MUSES02, OPA2604AP, and OPA2134PA Op-Amps, the amplifier offers a customizable sound quality experience. Enjoy an impressive SNR≥108dB and minimal THD≤0.005%, setting the stage for an audiophile-grade sound journey.
Seamless Connectivity: Bluetooth 5.0 Unleashed
Immerse yourself in the world of wireless connectivity with Bluetooth 5.0. Clear pairing is at your fingertips—just press and hold the volume control for five seconds. The amplifier also boasts a Bluetooth memory function, making future connections a breeze. Stay connected and receive alerts with an audible tone, ensuring an uninterrupted audio experience.
Precision Sound Control: Craft Your Sonic Landscape
Tailor your audio landscape with the BT20A Pro's unique sound control features. Revel in a wide range of bass and treble controls, or balance them for an unadulterated, original sound. Whether you prefer enhanced bass, heightened trebles, or the purity of unaltered audio, this amplifier caters to your preferences.
What's in the Box: Everything You Need for Audio Excellence
Your purchase includes the BT20A Pro Power Amplifier, a Bluetooth Antenna, a 32V 5A Power Adapter (with a plug that matches your country of delivery), an AC Cord, and a comprehensive User Manual. Enjoy peace of mind with our worry-free 12-month warranty and our commitment to friendly customer service.
Elevate Your Audio Universe with the Fosi Audio BT20A Pro—Where Sound Excellence Meets Innovation.
Model: BT20A PRO
Output Power: 300Wx2 @4Ω
Terminating Impedance: 2-8Ω
Input Mode: Bluetooth + RCA
Output Mode: Passive Speakers + Pre-out
Frequency Range: 20Hz-20kHz(±1.2dB)
THD: ≤0.005%
SNR : ≥108dB
Chip Set: TPA3255
Bluetooth Transmission Distance: Up to 50Ft
Bluetooth Transmission Format: SBC/AAC
Device Dimension: 5x5x1 inches
DC Input Range: 24-48V
Power Supply: 32V 5A
Warranty Period: 1 Year
What‘s in the box?
BT20A Pro Power Amplifier x 1
Bluetooth Antenna x 1
32V 5A Power Adapter x 1
AC Cord x 1
User’s Manual x 1
Warranty Period: 1 Year from the date of Invoice
Covered: Manufacturing Defects Only
Warranty Form: https://www.theaudiostore.in/pages/warranty-claim-form
Cable: 1-month warranty only for manufacturing defects only
Fosi Audio is a dynamic brand dedicated to providing the most comprehensive range of Hi-Fi audio products in the market. We cater to passionate audiophiles by offering Hi-Fi products, DIY kits, and expert guidance, ensuring an immersive audio experience. Beyond a mere transaction, we foster enduring relationships with our clients, supporting them throughout their audio journey.
Our diverse product lineup includes the Hi-Fi power amplifier, pre-amplifier, headphone amplifier, DAC, music player, Bluetooth receiver, DIY board, DIY chassis, and an array of DIY kits. These meticulously crafted offerings embody our commitment to exceptional sound quality and innovation.
Established in China in 2017, Fosi Audio was founded by a team of devoted audiophiles. Our products have gained significant popularity within the Chinese DIY audio community, amassing a large and dedicated following. To expand our reach beyond borders, we launched this website in 2017 and began offering a selection of products on Amazon under the name "Fosi audio." However, please note that many of our outstanding products are not yet available on this website or Amazon. If you cannot find what you're looking for, simply reach out to us via email, and we will be delighted to assist you in finding the perfect product to meet your needs.
At Fosi Audio, we are not just a brand; we are your partner in achieving audio excellence. Join us on this immersive sonic journey and experience the true essence of Hi-Fi audio.
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OUR HONEST REVIEWS FROM THE CO-FOUNDERS & AUDIOPHILES
View allTRUSTED BY OVER 35K+ MUSIC ENTHUSIAST
Let customers speak for us
from 5203 reviewsVery detailed sound and wide sound stage
The quality of the product really good and audiostore experience as well
The audio quality was great... And this is the first time I m buying from audio store... It was good experience and it came very faster than i expected !
The resolution of audio has improved drastically due to the balanced cable. The cable makes my Shanling UA2 Plus DAC + Amp to provide more power to the drivers of my Sennheiser HD620S headphones. So, the volume of the headphones has doubled.
The build is solid and the most impressive thing is the flat sound stage.It is recorded to use a portable DAC to get the best sound possible.Not recommended for bass lovers

Good
Very prompt response
It's very good very energetic sound
Audio quality is too good
The fitting and impact of sound quality and comfort is amazing I would love to buy more this kind of eartips
Most convenient

This was a gift for a friend of mine. The shipping took some time but when it reached them it was shipped the same day and after two days it was received. It came in perfect condition. I'll copy my friend's review below:
"This is most balanced IEM with a touch of warmth among everything out there. The Bass is just a bit much and with a 3db high-pass filter it became perfect. It doesn't get much better from this. The soundstage and imaging is decent and competes with +800$ stuff. The tuning, resolution and timbre is one of the best even under 2k. I'm very much in love with them. The comfort is pretty decent. I haven't got tired of them even after long hours."
The audio quality is very crisp and refreshing
The sound just amplified after using this with my kz castor pro IEMs....it is amazing.

Great product, strong magnet and holds the DAC snugly. Wish the 3M sticker was sold separately as well as already started to come off (user error).