--- product_id: 375052844 title: "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" brand: "fosi audio" price: "€ 80.56" currency: EUR in_stock: true reviews_count: 13 category: "Fosi Audio" url: https://www.desertcart.hr/products/375052844-ph04-4-channel-headphone-amp-portable-headphones-amplifier-splitter-4 store_origin: HR region: Croatia --- # Supports 15-150Ω headphones 4 independent 40mW outputs Individual volume control per channel 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 **Brand:** fosi audio **Price:** € 80.56 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your sound squad—because great audio is better shared! ## Quick Answers - **What is this?** 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 by fosi audio - **How much does it cost?** € 80.56 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/375052844-ph04-4-channel-headphone-amp-portable-headphones-amplifier-splitter-4) ## 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 - • **Safe & Reliable Power:** Includes a 12V/1A adapter with built-in overheat and overvoltage protection—enjoy worry-free, long-lasting performance backed by a 2-year warranty. - • **Sleek & Sturdy Design:** Crafted from durable aluminum alloy, this compact amp blends premium build quality with portability for on-the-go or desktop setups. - • **Quad-Channel Powerhouse:** Amplify your audio world with 4 independent 40mW outputs—perfect for collaborative studio sessions or shared entertainment. - • **Audiophile-Grade Clarity:** Equipped with ultra-low-noise op amps, delivering pristine, distortion-free sound even at max volume—hear every detail like a pro. - • **Personalized Volume Mastery:** Each channel sports its own volume knob, letting you tailor sound levels without disturbing others—ultimate control for every listener. ## Overview The Fosi Audio PH04 is a compact, metal-encased 4-channel headphone amplifier designed for professional and personal use. It independently powers up to four headphones with 40mW output each, supports a wide impedance range (15-150Ω), and features individual volume controls for personalized listening. Equipped with high-quality low-noise op amps and a safe 12V power adapter, it ensures clear, distortion-free sound and reliable operation, making it ideal for studios, gaming setups, and shared entertainment experiences. ## Description Product Description 4 Channel Headphone Amplifier Fosi Audio PH04 is a 4 channel amplifier features 4 independent stereo high-power amplifier sections with separate volume knob for each output allowing flexible control for different headphones or speakers. Portable and Durable Metal Exterior Portable and durable metal exterior, providing you with a comfortable and beautiful sound experience with a metallic feel. 12V/1A Power Aadapter Equipped with a 12V/1A power adapter, with overheat protection / overvoltage protection and other protection features, you do not have to worry about the use of headphone amplifiers in the process of easy to produce safety hazards. Review: Best thing for a gaming/office setup - Seriously one of the best purchases I've ever brought for my gaming setup. If I'm gaming I can play my game audio through my headset and then if I'm editing I can blast it through my speakers at the twist of switch honestly great purchase. Review: Great bit of kit - perfect little device ## Features - One-In-Four-Out: Each of the 4 channels can independently output up to 40mW@100Ω, which enables up to four people to monitor the mix for tracking, live use on stage or in streamers' studio. PH04 is also a perfect solution when you and your family and friends want to immerse in the same movie or game. - Independent Amplification: Equipped with independent level control knobs for each channel, ensuring that adjustments made to one channel do not affect others, allowing personalized volume settings for each headphone, perfectly compatible with a variety of monitor headphones and IEMs with impedance ranging from 15 to 150 ohms. - Clean 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: This headphone splitter perfectly combines a solid all-aluminum alloy build, exquisite appearance, and enhanced stability. It features four volume controls and a small, neat, compact design that is both practical and stable. - What You Get: PH04 amplifier*1, 12V DC power adapter*1, Use manual*1. This headphone amplifier comes nicely packaged with a solid feel to the case and the controls and connectors, and you can enjoy the peace of mind provided by Fosi Audio's 24-month warranty. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08XZL91VT | | Age Range Description | Adult | | Best Sellers Rank | 92 in Headphone Amplifiers | | Box Contents | 12V DC power adapter*1, Use manual*1 | | Brand | Fosi Audio | | Brand Name | Fosi Audio | | Colour | Black | | Connectivity technology | Wired | | Control Method | Touch | | Control Type | Button Control | | Country of Origin | China | | Customer Package Type | Standard Packaging | | Customer Reviews | 4.4 out of 5 stars 666 Reviews | | Enclosure Material | Metal | | Form factor | In Ear | | Headphone Form Factor | In Ear | | Included components | 12V DC power adapter*1, Use manual*1 | | Is Autographed | No | | Is Electric | Yes | | Item Weight | 0.38 Pounds | | Manufacturer | Fosi Audio | | Model Name | Fosi Audio PH04 | | Model Number | PH04 | | Model name | Fosi Audio PH04 | | Network Connectivity Technology | Wired | | Number of Items | 1 | | Product Features | Volume Control | | Product Warranty | 2 year manufacturer | | Style Name | In The Ear | ## Product Details - **Brand:** Fosi Audio - **Colour:** Black - **Form factor:** In Ear - **Model name:** Fosi Audio PH04 - **Connectivity technology:** Wired - **Included components:** 12V DC power adapter*1, Use manual*1 - **Age range (description):** Adult - **Material:** Metal - **Control type:** Button Control - **Item weight:** 0.38 Pounds ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/61PnqbMIBDL.jpg) ![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 - Image 2](https://m.media-amazon.com/images/I/71S2GrxuKBL.jpg) ![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 - Image 3](https://m.media-amazon.com/images/I/81cGmLMb0IL.jpg) ![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 - Image 4](https://m.media-amazon.com/images/I/71NIXLlzweL.jpg) ![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 - Image 5](https://m.media-amazon.com/images/I/71brDdeb7tL.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 ### ⭐⭐⭐⭐⭐ Best thing for a gaming/office setup *by C***3 on 31 January 2026* Seriously one of the best purchases I've ever brought for my gaming setup. If I'm gaming I can play my game audio through my headset and then if I'm editing I can blast it through my speakers at the twist of switch honestly great purchase. ### ⭐⭐⭐⭐⭐ Great bit of kit *by P***E on 13 January 2026* perfect little device ### ⭐⭐⭐⭐⭐ Sent out quickly. *by G***M on 12 December 2025* Does the job, has 4 headphones slots and has the 1/4 inch jack I require ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/375052844-ph04-4-channel-headphone-amp-portable-headphones-amplifier-splitter-4](https://www.desertcart.hr/products/375052844-ph04-4-channel-headphone-amp-portable-headphones-amplifier-splitter-4) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-14*