---
product_id: 549695750
title: "Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp"
brand: "fosi audio"
price: "$406.34"
currency: USD
in_stock: true
reviews_count: 9
url: https://www.desertcart.us/products/549695750-fosi-audio-48v-5a-power-adapter-supply-for-home-audio
store_origin: US
region: United States of America
---

# 48V stable output 5A high current delivery Built-in safety protections Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp

**Brand:** fosi audio
**Price:** $406.34
**Availability:** ✅ In Stock

## Summary

> 🔌 Power your passion with Fosi Audio’s reliable 48V 5A adapter — don’t let your sound settle for less!

## Quick Answers

- **What is this?** Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp by fosi audio
- **How much does it cost?** $406.34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/549695750-fosi-audio-48v-5a-power-adapter-supply-for-home-audio)

## Best For

- fosi audio enthusiasts

## Why This Product

- Trusted fosi audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** Sleek, lightweight design fits seamlessly into any home or office audio environment.
- • **Safety First, Always:** Overcurrent and overvoltage protections guard your gear for worry-free listening sessions.
- • **Versatile Compatibility:** Perfectly tailored for Fosi Audio amps like BT20A Pro, TB10D, and V3, plus LED and other devices.
- • **Amp Up to 5 Amps of Pure Power:** Delivers robust current to fuel high-performance audio setups and demanding devices.
- • **Power Your Sound with Precision:** Stable 48V output ensures your amplifier runs flawlessly without dips or spikes.

## Overview

The Fosi Audio 48V 5A Power Adapter is a high-quality, durable power supply designed specifically for Fosi Audio amplifiers and other high-power devices. It delivers a stable 48 volts at up to 5 amps, ensuring consistent performance with built-in safety features like overcurrent and overvoltage protection. Compact and lightweight, it’s ideal for home, office, or industrial use, providing reliable power for superior audio experiences.

## Description

Product Description Fosi Audio 48V 5A Power Adapter Supply Power your digital and optoelectronic devices with the reliable and efficient Fosi Audio 48V 5A power adapter. Ideal for Powering Fosi Audio Amplifiers DC Plug Size: 5.5*2.5mm (Outer Diameter: 5.5mm Inner diameter: 2.5 mm) It has an input voltage of AC 100-240V, a frequency range of 50-60Hz, and a maximum power output of 240W. Also widely used in LED products, making it the perfect choice for your home or office needs. Note that this adapter is not waterproof and should not be used in damp or wet environments. Simply Plug it into a Compatible Device Experiencing the benefits of stable and reliable power delivery. High-quality materials Comparison Chart 48V 5A BT30D PRO BT20A PRO TB10D V3-IN

Review: D - Definitely improvement over 32V oem adapter comes alongwith......reading reviews i was bit confused but again changing mind i ordered & results were great.....yes fosi audio heat lil bit but that's ok but adapter being cool even after 4-5 hours use. Using QA 3020i with fosi audio....amazing no need to add subwoofer now.
Review: Product is good but no improvement - Only volume became louder but No improvement in sound by switching to this expensive power supply.the tone of the sound actuallyy feels dull now. Am using it with fosi 20d bt pro. Unlike posted on web,this power supply is not the right match. It's better to buy more efficient speakers.

## Features

- The 48V 5A power adapter supply is specifically designed for use with amplifiers and is ideal for providing reliable power to Fosi Audio amplifiers, such as BT20A Pro, TB10D, and V3 amplifiers.
- Provides a stable and reliable output voltage of 48V for powering your device. Capable of delivering up to 5A of current, making it suitable for high-power applications.
- Manufactured with high-quality materials, ensuring long-term durability and reliability.
- Incorporates several safety features, including overcurrent protection and overvoltage protection, to ensure safe operation.
- The compact and lightweight design allows for easy portability and uses in tight spaces. It can be used in a range of settings, including home, office, or industrial environments.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C2BQ4P8J |
| Amperage | 5 Amps |
| Best Sellers Rank | #46,107 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #802 in Power Supplies (Computers & Accessories) |
| Box Contents | 1 Power Adapter |
| Brand | Fosi Audio |
| Brand Name | Fosi Audio |
| Colour | Black |
| Customer Reviews | 4.5 out of 5 stars 436 Reviews |
| Importer Contact Information | support@fosiaudio.com |
| Item Dimensions | 19.3 x 9 x 3.8 Centimeters |
| Item Weight | 0.79 Kilograms |
| Item Weight Unit of Measure | 0.79 Kilograms |
| Item dimensions L x W x H | 19.3 x 9 x 3.8 Centimeters |
| Manufacturer | fosiaudio |
| Manufacturer Part Number | 48V電源 |
| Model Number | 48V |
| Output Voltage | 48 Volts |
| Output Wattage | 240 Watts |
| Packer Contact Information | support@fosiaudio.com |
| Unit Count | 1 Count |

## Product Details

- **Amperage:** 5 Amps
- **Brand:** Fosi Audio
- **Colour:** Black
- **Compatible Devices:** Home Audio
- **Included Components:** 1 Power Adapter
- **Output Voltage:** 48 Volts
- **Power Source:** Corded Electric
- **Special Feature:** Lightweight Design
- **Total USB Ports:** 1
- **Wattage:** 36 Watts

## Images

![Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp - Image 1](https://m.media-amazon.com/images/I/616FrVzTcqL.jpg)
![Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp - Image 2](https://m.media-amazon.com/images/I/61lbQrKvudL.jpg)
![Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp - Image 3](https://m.media-amazon.com/images/I/71y5BlzPqLL.jpg)
![Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp - Image 4](https://m.media-amazon.com/images/I/61UDkJ8kl2L.jpg)
![Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp - Image 5](https://m.media-amazon.com/images/I/71pxMpEaGlL.jpg)

## Questions & Answers

**Q: Will this work with Fosi Audio BL20A ?  Will it improve sound quality?**
A: 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.

**Q: What is better power supply to use for Fosi BL20a amp? 32v 5a or 24v 8a or 48v 5a?**
A: 48v

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

**Q: did it improve bt20a pro quality? if yes which speaker type and watt do you use that make a difference?**
A: 48 V power supply improved sound with more clarity and wider soundstage. Speaker type is best at 8ohms.

## Customer Reviews

### ⭐⭐⭐⭐⭐ D
*by P***R on 3 October 2025*

Definitely improvement over 32V oem adapter comes alongwith......reading reviews i was bit confused but again changing mind i ordered & results were great.....yes fosi audio heat lil bit but that's ok but adapter being cool even after 4-5 hours use. Using QA 3020i with fosi audio....amazing no need to add subwoofer now.

### ⭐⭐⭐ Product is good but no improvement
*by A***R on 25 December 2024*

Only volume became louder but No improvement in sound by switching to this expensive power supply.the tone of the sound actuallyy feels dull now. Am using it with fosi 20d bt pro. Unlike posted on web,this power supply is not the right match. It's better to buy more efficient speakers.

### ⭐⭐ 48V 5amp not working
*by G***Y on 10 October 2024*

48v /5 amp And 32v /5 amp no deference

## Frequently Bought Together

- Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-05*