--- product_id: 226896925 title: "Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V" brand: "douk audio" price: "€ 81.50" currency: EUR in_stock: true category: "Douk Audio" url: https://www.desertcart.at/products/226896925-douk-audio-u3-headphone-amps-mini-hi-fi-amplifier-home store_origin: AT region: Austria --- # 1300mA Class A output current Wide frequency response & dynamic range DC 5-20V wide input voltage Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V **Brand:** douk audio **Price:** € 81.50 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your desktop audio game with warm, powerful clarity — don’t just listen, experience! ## Quick Answers - **What is this?** Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V by douk audio - **How much does it cost?** € 81.50 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/226896925-douk-audio-u3-headphone-amps-mini-hi-fi-amplifier-home) ## 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 Yet Mighty:** Miniature footprint with a sleek design that fits perfectly on your desktop while driving even high-impedance headphones effortlessly. - • **Immersive Soundstage:** Delivers smooth, mellow tones ideal for vocals, strings, classic, pop, and rock—bringing your music to life with exceptional purity and detail. - • **Versatile Voltage Range:** Operates seamlessly from DC 5V up to 20V, ensuring consistent high-voltage 26V circuit performance and pristine audio clarity. - • **Plug-and-Play Op Amp Upgrade:** Customize your sound with an easy-to-swap op amp socket—perfect for audiophiles who love to DIY and fine-tune their listening experience. - • **Powerful Class A Amplification:** Experience ultra-low distortion and warm, full-bodied sound with a 1300mA large current output transistor. ## Overview The Douk Audio U3 is a compact Class A headphone amplifier designed for home and desktop use, featuring a wide DC 5-20V input range, 1300mA output current, and a plug-in op amp socket for customizable sound. It delivers ultra-low distortion, excellent frequency response, and strong drive power capable of handling high-impedance headphones, making it a cost-effective, audiophile-grade upgrade for immersive listening. ## Description desertcart.com: Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V : 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 | #16,916 in Electronics ( See Top 100 in Electronics ) #26 in Headphone Amps | | Brand Name | Douk Audio | | Customer Reviews | 4.4 4.4 out of 5 stars (851) | | Item Weight | 0.37 Pounds | | Manufacturer | Douk Audio | | Maximum Supply Voltage | 20 Volts (DC) | | Minimum Supply Voltage | 5 Volts (DC) | | Model | XZ-U3 | | Mounting Type | Freestanding | | Number of Channels | 2 | | Output Power | 1300 Milliwatts | | Part Number | XZ-U3 | | Specification Met | FCC | ## Product Details - **Brand:** Douk Audio - **Manufacturer:** Douk Audio - **Maximum Supply Voltage:** 20 Volts (DC) - **Minimum Supply Voltage:** 5 Volts (DC) - **Mounting Type:** Freestanding ## Images ![Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V - 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 --- ## 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.at/products/226896925-douk-audio-u3-headphone-amps-mini-hi-fi-amplifier-home](https://www.desertcart.at/products/226896925-douk-audio-u3-headphone-amps-mini-hi-fi-amplifier-home) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-07-22*