Will this work with Fosi Audio BL20A ? Will it improve sound quality?

Max voltage for the BL20A is 24V. This is the limit for the two TPA3116D2 chips, so I would not recommend a 32V power supply. Fosi Audio sells a 24V supply that might "improve" sound with respect to the amount headroom (large swings in volume) you can get without distortion but I doubt you could tell the difference at reasonable volumes.

Bt30dpro is only rated to 36v5a does this supply really work for it? is there a 36/48v 10a version?

I bought this power supply for the for the Fosi BT10D it will take up to a 48 volt power supply. My two other Fosi amps will only use a 32 volt power supply. So you must be careful to use the correct unit. Sadly I am not familiar with the BT30Dpro. If you go to the Fosi website they might have additional information. I am sorry I could not be more help.

did it improve bt20a pro quality? if yes which speaker type and watt do you use that make a difference?

48 V power supply improved sound with more clarity and wider soundstage. Speaker type is best at 8ohms.

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Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp

Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp

Product ID: 553223851

Details

Brand
Fosi Audio
Colour
Black
Connector type
2-Pin
Item weight
0.79 Kilograms
Material
Plastic

⚡48V stable output

🔋5A high current delivery

🛡️Built-in safety protections

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Description

🔌 Power your passion with precision and protection!

COMPACT POWERHOUSE - Lightweight and portable design fits seamlessly into any setup, from cozy apartments to professional studios.
SAFETY FIRST ALWAYS - Integrated overcurrent and overvoltage protection keeps your gear safe and your sound clean, 24/7.
AMP UP WITHOUT LIMITS - Generous 5A current capacity powers even demanding speakers with ease—perfect for home parties or office vibes.
TRUSTED BY AUDIOPHILES - Highly rated with 4.6 stars from 400+ users who upgraded their sound experience without breaking the bank.
POWER YOUR SOUND LIKE A PRO - Delivers a rock-solid 48V output tailored for Fosi Audio amps, ensuring your music never misses a beat.

The Fosi Audio 48V 5A Power Adapter is a compact, durable, and reliable power supply designed specifically for Fosi Audio amplifiers like BT20A Pro, TB10D, and V3. It delivers a stable 48V output with up to 5 amps of current, ensuring high-performance audio without distortion or overheating. Built-in safety features protect your equipment, while its lightweight design makes it perfect for home, office, or portable use. A top-rated upgrade that audiophiles trust for clean, powerful sound.

Specifications

ASIN	B0C2BQ4P8J
Amperage	5 Amps
Best Sellers Rank	#18,592 in Electronics ( See Top 100 in Electronics ) #82 in Audio & Video Adapters
Brand	Fosi Audio
Built-In Media	1 cable
Color	Black
Connector Type Used on Cable	2-Pin
Customer Reviews	4.6 4.6 out of 5 stars (426)
Enclosure Material	Plastic
Form Factor	Compact
Input Voltage	48 Volts
Item Dimensions	19.3 x 9 x 3.8 centimeters
Item Weight	0.79 Kilograms
Manufacturer	Fosi Audio
Mfr Part Number	48V電源
Model Number	48V
Output Current	5 Amps
Output Voltage	48 Volts
Output Wattage	240 Watts
Specification Met	CE
Unit Count	1.0 Count

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$215.19

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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