# Fosi Audio DS1-US Portable DAC Headphone Amplifier with ES9038Q2M, 3.5mm and 4.4mm outputs

Enjoy headphone listening from compatible devices with the portable Fosi Audio DS1-US, featuring 3.5mm and 4.4mm outputs.

- [Original product page](https://www.ofertitastop.com/ie/product/fosi-audio-ds1-us-portable-dac)
- [View offer](https://www.ofertitastop.com/ie/visit/fosi-audio-ds1-us-portable-dac)
- Market: IE
- Language: en-IE
- Currency: EUR
- Product updated: 2026-11-01T03:48:33.990Z
- Brand: Fosi Audio
- Model: DS1-US
- MPN: DS1
- SKU: ofertitastop-ie-6446
- Category: Electronics > Audio > Audio Components > Power & Headphone Amplifiers > Headphone Amplifiers
- Source store: amazon IE
- Active deal: Yes
- Price: 81.80 EUR
- Previous price: 89.99 EUR
- Discount: 9%
- Rating: 4.2 / 5
- Reviews: 485

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## Description

For listening to music from a mobile phone or computer through headphones, the Fosi Audio DS1-US adds a dedicated DAC and headphone amplifier in a portable USB unit. Its ES9038Q2M chip supports high-resolution PCM and DSD audio formats.

Choose between the 3.5mm single-ended output and the 4.4mm balanced output to suit your headphones. Switchable high- and low-impedance modes let you tailor the amplifier to a range of headphone types.

The DS1-US also offers 60-step volume adjustment with a memory function, plus an LED indicator that shows the audio sampling rate. What difference can that make day to day? It gives you a clear view of the signal format while keeping volume control close at hand.

## How to use it

Connect the DS1-US to a compatible Mac, Windows, Android or iOS device, then plug your headphones into the appropriate output. For an iOS device with a Lightning port, a Lightning-to-Type-C cable is required. Select the high- or low-impedance mode for your headphones and adjust the volume using the amplifier’s controls.

The 3.5mm output provides a single-ended connection, while the 4.4mm output supports balanced headphones. With up to 240mW of output and support for headphones up to 300 ohms, the DS1-US is designed to drive a variety of headphone setups. Its switchable UAC1.0 mode also supports use with gaming consoles such as PS5, making it suitable for listening at a desk or relaxing on the sofa.

## Why it makes sense

A portable DAC amp is a useful alternative to relying solely on a phone or computer’s built-in audio output. The DS1-US combines conversion and amplification in one device, with high-resolution format support and two headphone output options. That makes it a practical fit for moving between compatible devices and headphones without choosing a separate DAC and amplifier.

An independent active crystal oscillator is designed for low jitter and low phase noise, and the unit is optimised to minimise power consumption from the connected device. Buyers often highlight the sound and its ability to amplify audio from phones and tablets. Experiences with heat and connection stability are mixed, so these are best treated as individual user impressions rather than a promise of performance.

## At a glance

- Type: Portable USB DAC headphone amplifier
- DAC chip: ES9038Q2M
- Supported formats: PCM 32-bit/768kHz and DSD512
- Outputs: 3.5mm single-ended and 4.4mm balanced
- Output power: Up to 240mW
- Headphone impedance: Up to 300 ohms
- Volume: 60-level adjustment with memory function
- Compatibility: Mac, iOS, Android, Windows and gaming consoles such as PS5 in UAC1.0 mode

## Before you decide

**Which headphones can I connect?** The DS1-US has 3.5mm single-ended and 4.4mm balanced outputs. It supports headphones up to 300 ohms, with high- and low-impedance modes to suit different headphones.

**Can I use it with an iPhone or iPad?** It is compatible with iOS devices. For a device with a Lightning port, use a Lightning-to-Type-C cable.

**Does it support gaming consoles?** The switchable UAC1.0 mode is intended to improve compatibility with gaming consoles such as PS5.

## Is it worth it?

For listeners who want a portable DAC and headphone amplifier with both 3.5mm and 4.4mm outputs, the DS1-US brings useful connection choices, high-resolution format support and hands-on volume control together in one unit. It suits everyday listening from compatible phones and computers, as well as a home setup where headphone choice or console use calls for a dedicated USB audio device.

## Images

![Fosi Audio DS1-US Portable DAC Headphone Amplifier with ES9038Q2M, 3.5mm and 4.4mm outputs — 1](https://www.ofertitastop.com/i/9zU9piXesrIcGmtPUhMgp_y_mhXqDOiM0_k5n7jg2V-X2RrvhL-94sAzuUo4RNnw2nW5BxKRZ-J-WMDBMnl9ZrYRAz1RhuOt7oNRaMVBgPZ4m55iis_Etg.jpg)

![Fosi Audio DS1-US Portable DAC Headphone Amplifier with ES9038Q2M, 3.5mm and 4.4mm outputs — 2](https://www.ofertitastop.com/i/fDN2FP6tXe01dVVKjPAdfcEWyBgLQebK8sr3OWfw7OgfLXQxxAY08We1rxOhPepp3cvM5C-v55AcFzQI5Yc5ouxUGZff9J0MF-Xva31s_U8pZMjlKu35sg.jpg)

![Fosi Audio DS1-US Portable DAC Headphone Amplifier with ES9038Q2M, 3.5mm and 4.4mm outputs — 3](https://www.ofertitastop.com/i/zqWPXiIpB38lWIzWtO5-tl6lS65gnGwUqXxtfIW_BZLxY4um2gNq8ZyykAUBywiONpCsU2V_ksyafLLmvz1vC7iw99AelfLqvwlH5roQk3V7aDduWB_RJA.jpg)

![Fosi Audio DS1-US Portable DAC Headphone Amplifier with ES9038Q2M, 3.5mm and 4.4mm outputs — 4](https://www.ofertitastop.com/i/0cOcGwOI0JoSzENZxGGfJA5YRFXb30-dDWsSDDr6n85l7mIjpzv_j3A9xZfjYkPBKEp6UsyKYyv_pf26izd6zfglZ-qUJRo4oR9Id09060-FxhpHYiYzpQ.jpg)

![Fosi Audio DS1-US Portable DAC Headphone Amplifier with ES9038Q2M, 3.5mm and 4.4mm outputs — 5](https://www.ofertitastop.com/i/aajH6vq7McuVdYSieQAa5HxdTsHDhXzCh8HlVw9x8vq_ZrOK1RZ3heDA5uvhJpZmg2jx72vGmtrGUz4FN0WJ0lvJgC__mHFbpJKRdutK1U9mW9OXSM4T6A.jpg)