---
product_id: 530911742
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: "¥22269"
currency: JPY
in_stock: true
reviews_count: 13
category: "Fosi Audio"
url: https://www.desertcart.jp/products/530911742-fosi-audio-48v-5a-power-adapter-supply-for-home-audio
store_origin: JP
region: Japan
---

# 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:** ¥22269
**Availability:** ✅ In Stock

## Summary

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

## 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?** ¥22269 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/530911742-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

- • **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

## Overview

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.

## Description

Buy Fosi Audio 48V 5A Power Adapter Supply for Home Audio Bluetooth Stereo Receiver Amplifier Mini Hi-Fi Class D Integrated Amp: Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: For low volume listening? Yes - For the Fosi TB10d amp this made a useful difference. Yes it can crank up the volume overall but it increases clarity at lower volumes (seems to me).
Review: Nice upgrade - I swapped this 48V supply for the 32V one that came with my BT20a Pro... It made a surprisingly noticable difference in the dynamics of the sound... It did make the amp run warmer... I added a cheap silent USB powered fan to keep the temperature at roughly 80-85F.

## 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, V3, and ZA3 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 A |
| Best Sellers Rank | #28,721 in Electronics ( See Top 100 in Electronics ) #142 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 461 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電源 |
| Model Number | 48V |
| 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 |

## Product Details

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

## 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/61w7UQ-tuxL.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/61UDkJ8kl2L.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/71QDSFX1DbL.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

### ⭐⭐⭐⭐⭐ For low volume listening? Yes
*by Z***C on August 14, 2026*

For the Fosi TB10d amp this made a useful difference. Yes it can crank up the volume overall but it increases clarity at lower volumes (seems to me).

### ⭐⭐⭐⭐⭐ Nice upgrade
*by T***V on April 26, 2026*

I swapped this 48V supply for the 32V one that came with my BT20a Pro... It made a surprisingly noticable difference in the dynamics of the sound... It did make the amp run warmer... I added a cheap silent USB powered fan to keep the temperature at roughly 80-85F.

### ⭐⭐⭐⭐⭐ Nice upgrade for even more clean power.
*by T***M on December 23, 2025*

Seems to be doing as expected! Very good value!

## 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 Japan*
*Store origin: JP*
*Last updated: 2026-09-22*