---
product_id: 386071357
title: "PH04 4 Channel Headphone Amplifier Stereo Audio Amp with 12V 1.5A Power Adapter Ultra-Compact Portable Headphone Splitter for Studio and Stage"
brand: "fosi audio"
price: "A$101"
currency: AUD
in_stock: true
reviews_count: 3
url: https://www.desertcart.com.au/products/386071357-ph04-4-channel-headphone-amplifier-stereo-audio-amp-with-12v
store_origin: AU
region: Australia
---

# Ultra-compact design 4 channels High-power output PH04 4 Channel Headphone Amplifier Stereo Audio Amp with 12V 1.5A Power Adapter Ultra-Compact Portable Headphone Splitter for Studio and Stage

**Brand:** fosi audio
**Price:** A$101
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate Your Audio Game with Fosi!

## Quick Answers

- **What is this?** PH04 4 Channel Headphone Amplifier Stereo Audio Amp with 12V 1.5A Power Adapter Ultra-Compact Portable Headphone Splitter for Studio and Stage by fosi audio
- **How much does it cost?** A$101 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/386071357-ph04-4-channel-headphone-amplifier-stereo-audio-amp-with-12v)

## 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

- • **Complete Package:** Includes everything you need for seamless setup and operation.
- • **Unleash the Sound:** Experience high-fidelity audio with 4 independent channels.
- • **Compact Powerhouse:** Easily portable design for studio and stage use.
- • **Tailored Listening:** Each listener controls their own volume for a personalized experience.
- • **Professional Quality:** Ultra-low-noise op amps ensure pristine sound at any volume.

## Overview

The Fosi Audio PH04 is a 4-channel headphone amplifier designed for studio and stage applications, allowing up to four users to enjoy high-quality audio with independent volume control. Its ultra-compact design and professional-grade components make it an essential tool for musicians and audio professionals.

## Description

PH04 4 Channel Headphone Amplifier Stereo Audio Amp with 12V 1.5A Power Adapter Ultra-Compact Portable Headphone Splitter for Studio and Stage

## Features

- 【4 Channel Stereo Headphone Amplifier】Fosi Audio PH04 is a 4 high-power stereo amplifiers with output level control for each channel, compatible with 3.5MM headphones and 6.35MM headphones(You need a 3.5MM to 6.35MM adapter). If you're tracking more than one musician at once, or if everyone in a group wants to listen to a playback, you need a monitor distribution system. The compact, flexible PH04 can power up to four pairs of headphones and up to four independent volumes.
- 【Upgraded Version】PH04 is designed with a power switch and 3.5MM headphone output compare with other 4 CH headphone amp. When a recording session calls for everyone's heads and ears to be in the game, the PH04 is the perfect solution and a real money-saver!
- 【Great Sound, Great Value】The PH04 contains 4 independent stereo high-power amplifier sections that maintain the highest sonic quality even at maximum volume levels. These ultra-low-noise operational amplifiers are included for outstanding audio performance: the same op amps found in "full-size" audio equipment.
- 【Ultra-Compact Design】A Simple Solution: Ultra-compact headphone amplifier system for studio and stage applications. Grab this super-compact amp during your sessions to power practically any headphones: four of them at the same time. To be exact, let up to 4 different people in your studio listen to the main mix while recording, and each listener can determine their own preferred volume level using the dedicated output level controls.
- 【What You Get】PH04 Amp x1, 12V DC power adapter x1, user manual x1, our worry-free 24-month warranty, and friendly customer service.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08XZL91VT |
| Age Range (Description) | Adult |
| Best Sellers Rank | #35,464 in Electronics ( See Top 100 in Electronics ) #67 in Headphone Amps |
| Cable Feature | Detachable |
| Compatible Devices | headphones |
| Connectivity Technology | Wired |
| Control Method | Touch |
| Control Type | Button Control |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.5 4.5 out of 5 stars (647) |
| Date First Available | March 5, 2021 |
| Headphones Jack | 6.35 mm Jack |
| Included Components | 12V DC power adapter*1, Use manual*1 |
| Item Weight | 6.1 ounces |
| Item model number | PH04 |
| Manufacturer | Fosi Audio |
| Material | Metal |
| Model Name | Fosi Audio PH04 |
| Noise Control | None |
| Number of Items | 1 |
| Product Dimensions | 4 x 2 x 1 inches |
| Recommended Uses For Product | Calling, Gaming |
| Special Feature | Portable |
| Specific Uses For Product | Studio, Sport, Video Game, Music |
| Style | In The Ear |
| Unit Count | 1.0 Count |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** Fosi Audio
- **Colour:** red
- **Ear placement:** Over Ear
- **Form factor:** In Ear
- **Headphone jack:** 6.35 mm Jack

## Images

![PH04 4 Channel Headphone Amplifier Stereo Audio Amp with 12V 1.5A Power Adapter Ultra-Compact Portable Headphone Splitter for Studio and Stage - Image 1](https://m.media-amazon.com/images/I/61IKj7nm7qL.jpg)

## Questions & Answers

**Q: Will this device switch microphone inputs as well? I play to connect this to a laptop to switch between headphone/mic inputs.**
A: You should look into mixers? Mixers have multiple inputs and one output for speaker. It has a jack for headphone.

**Q: Does have to plug into the tv or use Bluetooth**
A: You plug the speaker output on your TV or computer to the Input then you have the availability to plug in external speakers or headphones.

**Q: My speakers and headphones make pop-noise whenever turning it on, Can I just leave it on with the lowest volume when not using it?**
A: The reason for the popping noise when the amplifier is turned on is that it does not have a capacitor in line with the power supply.  The amplifier produces sound through electrical current, so the initial surge of electricity when the device is turned on, causes a kind of signal to be forced through to the headphones.

In theory, such a thing could cause damage to a speaker, if the "signal" overloads the power ratings of the speakers, but in practice, this is not very likely, especially for an amplifier like this one.  The bigger issue, to my mind, is that if you're wearing headphones and the volume is turned up, you may expose your ears to a rather loud pop, which could be harmful.

So, yes, you could avoid the problem by not turning the unit off but only turning the volume down.  I would still recommend, however, the step of putting your headphones on only after you have plugged them in, and if you do turn the amplifier off, putting your headphones on only after you have turned the unit back on.

**Q: I bought 8 of these and we have tried several. And we have tried using difference stereo cables. No matter what we do left side only??**
A: Mine works fine.
Please check the source, sometimes happens that there is the problem with the setup. Just put some basic headphones with volume and check that the source is sounding fine, complete

## Customer Reviews

### ⭐⭐⭐⭐ Fosi PH04
*by A***R on 10 January 2023*

Its an awesome product from Fosi, connect and control 4 microphone indepenently, used this product to connect my senheiser headphone

### ⭐ Very bad.
*by S***S on 27 October 2023*

Stopped working after 2 days

### ⭐⭐⭐⭐⭐ Small and reliable device
*by A***R on 4 September 2023*

I am using it for translation services for the events being conducted. So, at a time, four people can connect their headphones and listen to the translator's translation. It is not complicated, and it is an effortless setup. Other expensive options are there which are wireless, however for my need, it’s perfect.

## Frequently Bought Together

- Fosi Audio PH04 4 Channel Headphone Amp, Portable Headphones Amplifier Splitter 4 Way for Music Studio, Mixer Audio Sharing Podcast Monitor, Supports 15-150 Ohms with 12V Power Adapter
- Headphone Splitter Cable Syncwire 3.5mm Aux Splitter Adapter Nylon Braided Male to 2X Female Aux Extension Cord for Apple iPhone/iPod/iPad, Samsung, Earphone, Speaker, MP3 Player - 0.77ft/23CM (Black)
- Syncwire Aux Cable 3.5mm –3.3ft/1M- Nylon Braided Aux Lead for Car, Headphone, iPhone, iPad, iPod, Samsung, MP3 Player, Smartphone, Echo Dot, Tablet, Home Stereos, Laptop and More – Black

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**Shop now:** [https://www.desertcart.com.au/products/386071357-ph04-4-channel-headphone-amplifier-stereo-audio-amp-with-12v](https://www.desertcart.com.au/products/386071357-ph04-4-channel-headphone-amplifier-stereo-audio-amp-with-12v)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-01-24*