---
product_id: 573020882
title: "U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V"
brand: "douk audio"
price: "R$753"
currency: BRL
in_stock: true
category: "Douk Audio"
url: https://www.desertcart.com.br/products/573020882-u3-mini-class-a-headphone-amplifier-hifi-desktop-home-stereo
store_origin: BR
region: Brazil
---

# 1300mW output power Supports 18-600Ω headphones Wide 5-20V input voltage U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V

**Brand:** douk audio
**Price:** R$753
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your audio game with the Douk Audio U3 — where power meets precision!

## Quick Answers

- **What is this?** U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V by douk audio
- **How much does it cost?** R$753 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/573020882-u3-mini-class-a-headphone-amplifier-hifi-desktop-home-stereo)

## Best For

- douk audio enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Stylish:** Sleek mini form factor fits perfectly on any desk or home setup, combining elegance with high-end audio performance.
- • **Audiophile-Grade Sound:** Equipped with TI-NE5532 op amp and class A transistors for ultra-low distortion and warm, detailed audio.
- • **Flexible Voltage Range:** Operates seamlessly between 5V and 20V DC, ensuring compatibility with a variety of power adapters for ultimate convenience.
- • **Powerhouse Performance:** Delivers a robust 1300mW output to effortlessly drive high-impedance headphones with crystal-clear clarity.
- • **Customizable Sound Experience:** Pluggable op amp socket design invites DIY upgrades, letting you tailor your sound signature like a true audio connoisseur.

## Overview

The Douk Audio U3 is a compact, high-performance headphone amplifier featuring a wide 5-20V input range, 1300mW output power, and support for headphones from 18 to 600Ω. It uses a classic TI-NE5532 op amp and class A transistor design for warm, low-distortion sound. Its pluggable op amp socket allows easy upgrades, making it perfect for audiophiles seeking customizable, detailed audio in a stylish, space-saving package.

## Description

Douk Audio U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V : desertcart.in: Electronics

## Features

- Adopting innovative circuit design, DC 5-20V wide input working voltage, the amplifier circuit can always work at a high voltage of 26V, and the background noise index is excellent. With wide frequency response extension, excellent transient response, excellent purity and transparency, and good dynamic range.
- Adopting original TI-NE5532 classical op amp and transistor expanding current circuit, using 1300mA large current output transistor working in class A status, with ultra-low distortion, and the sound is warm and delicate, full and mellow.
- Pluggable op amp socket design, convenient to upgrade different op amps and bring much DIY fun and playability for audiophiles. Smooth and mellow sound, suitable for listening to vocals or string music, classic or pop music, and even with unique charm when playing rock.
- Mini size with exquisite appearance and most cost-effective, brings big surprise for all audiophiles, easily to drive most headphones in the market, providing larger power, better sound field and details, very suitable for home/office desltop audio system use.
- With strong drive power, easily to drive most high-impedance headphones such as: HD580/HD600/HD650/K701/K702/Q701/DT880/T70/T90/SR225/SR325/RS1e

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08C2MKBGN |
| Best Sellers Rank | #249,080 in Electronics ( See Top 100 in Electronics ) #421 in Hi-Fi Amplifiers |
| Brand Name | Douk Audio |
| Customer Reviews | 4.4 4.4 out of 5 stars (801) |
| Included Components | 1*6.35mm to 3.5mm Headphone Adapter, 1*U3 Headphone Amplifier, 1*USB to DC Cable |
| Item Weight | 168 g |
| Manufacturer | Douk Audio |
| Maximum Output Power | 1.3W |
| Maximum Supply Voltage | 20 Volts (DC) |
| Minimum Supply Voltage | 5 Volts (DC) |
| Model Number | XZ-U3 |
| Mounting Type | Freestanding |
| Number of Channels | 2 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Output Power | 1300 Milliwatts |
| Part Number | XZ-U3 |
| Specification Met | RoHS |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Douk Audio
- **Manufacturer:** Douk Audio
- **Maximum Supply Voltage:** 20 Volts (DC)
- **Minimum Supply Voltage:** 5 Volts (DC)
- **Mounting Type:** Freestanding

## Images

![U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V - Image 1](https://m.media-amazon.com/images/I/61Q-w-nktiL.jpg)

## Questions & Answers

**Q: What is the advantage or disadvantage of using a power supply voltage higher than the 5v you get through the usb to dc cable?**
A: The USB power plug included, when plugged into the PC directly just have an overwhelming hiss.  The hiss left when I used a 1A 5V USB charger, but the best sound came when I found an old large "wall-wart" 12V 1A with the same plug.  The jump from 5V to 12V added a lot of warmth and detail.  Get the linear supply wall-worts, not the switching kind (generally smaller in form-factor).  I also used ferrite snap-on cores on the audio from the pc, high quality shielded audio cables.  I'm most pleased with this unit when it's properly powered.

**Q: Is this a decent headphone amp for a turntable that has a built in pre amp?**
A: Signal source is irrelevant as long as it is a low impedance line level.

**Q: Can someone post a link to a good DC power adapter for this sold on Amazon?**
A: When I purchased this item recently from Amazon, I had a similar concern about the power supply, because I live in a 220V 50Hz electric supply zone. In my case, I received the amplifier with a charging cable having a standard (I think) plug on one end and a USB A plug on the other end. This end can be plugged into any phone charger with a USB A port. I found the amplifier works very well if this is also plugged in the USB port on the computer.

**Q: How do I pick another power supply for this? I’d like to replace it but don’t know how to figure out if something will work with this.**
A: I’m using a Radio Shack 12volt 1000ma power adapter. It comes with different tip sizes so I used one that fit and that had a positive center like shown printed on the back (near the receptacle) of the amp. The range required of the Douk is 5 volts to 20 volts so mine being 12 volts is good. In the reviews someone  commented that they had issues with using 5 volt chargers. That’s why I went with a little more power. 
Check your manual in case they made changes to this unit since the time bought it( earlier this year)

## Frequently Bought Together

- Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V
- Amazon Basics 3.5mm Stereo Aux to 2 x RCA Audio Cable Adapters, 4 Feet/1.2 m, for Connecting Amplifiers, Speakers, with Gold-Plated Plugs, Black
- UGREEN 3.5mm to RCA Cable, 6.6FT RCA Male to Aux Audio Adapter HiFi Sound Headphone Jack Adapter Metal Shell Y Splitter Auxiliary Cord 1/8 Connector for Phone Speaker MP3 Tablet HDTV

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-08-31*