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

Product ID: 530911742

Details

Brand
Fosi Audio
Color
Black
Connector Type
Barrel
Item Weight
0.79 kg
Material
Plastic

⚡48V stable output

🔋5A high current delivery

🛡️Built-in safety protections

€ 120.13

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Description

🔊 Elevate your audio setup with power and precision — don’t get left behind!

BUILT TO LAST - Premium materials guarantee durability and long-term reliability
COMPACT POWERHOUSE - Lightweight, space-saving design fits seamlessly in any setup
SAFETY FIRST ALWAYS - Overcurrent and overvoltage protection safeguard your gear
AMP UP YOUR AUDIO GAME - Delivers a robust 5A current for high-power applications
POWER YOUR SOUND WITH PRECISION - Stable 48V output ensures consistent amplifier performance

The Fosi Audio 48V 5A Power Adapter is engineered to deliver stable, high-current power specifically for Fosi Audio amplifiers like BT20A Pro and TB10D. Featuring built-in safety protections and a compact design, it ensures reliable, long-lasting performance in home or office audio setups.

Specifications

ASIN	B0C2BQ4P8J
Amperage	5 A
Best Sellers Rank	#28,228 in Electronics ( See Top 100 in Electronics ) #146 in Audio Component Amplifiers
Brand	Fosi Audio
Built-In Media	1 x AC Adapter
Color	Black
Connector Type	Barrel Connector
Connector Type Used on Cable	Barrel Connector
Customer Reviews	4.5 out of 5 stars 477 Reviews
Enclosure Material	Plastic
Form Factor	Compact
Input Voltage	48 volts
Item Dimensions	7.6 x 3.54 x 1.5 inches
Item Weight	0.79 kg
Manufacturer	Fosi Audio
Material	Plastic
Maximum Power	240 watts
Mfr Part Number	48V-EU
Model Number	48V-EU
Number of Items	1
Number of Packs	1
Output Current	5 A
Output Voltage	48 volts
Output Wattage	240 watts
Specification Met	CE
Unit Count	1 Count
Warranty Description	24 Month Manufacturer

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€ 120.13

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered 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 Portugal.

Secure transaction

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Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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