--- product_id: 224227339 title: "Douk Audio U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V (U3)" brand: "nobsound" price: "£55.76" currency: GBP in_stock: true reviews_count: 8 url: https://www.desertcart.co.uk/products/224227339-douk-audio-u3-mini-class-a-headphone-amplifier-hifi-desktop store_origin: GB region: United Kingdom --- # 1300mA output DC 5-20V input DIY upgradeable Douk Audio U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V (U3) **Brand:** nobsound **Price:** £55.76 **Availability:** ✅ In Stock ## Summary > 🎶 Elevate Your Audio Game with the Douk U3! ## Quick Answers - **What is this?** Douk Audio U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V (U3) by nobsound - **How much does it cost?** £55.76 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/224227339-douk-audio-u3-mini-class-a-headphone-amplifier-hifi-desktop) ## Best For - nobsound enthusiasts ## Why This Product - Trusted nobsound brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Powerhouse:** Mini design that fits seamlessly into any desktop setup. - • **Unleash Your Sound:** Experience ultra-low distortion with Class A amplification. - • **Noise-Free Listening:** Innovative circuit design ensures a pristine audio background. - • **Drive with Confidence:** Effortlessly powers high-impedance headphones for rich sound. - • **Audiophile's Playground:** Easily swap op amps for a personalized audio experience. ## Overview The Douk Audio U3 Mini Class A Headphone Amplifier is a compact yet powerful audio solution designed for audiophiles. With a wide input voltage range of DC 5-20V, it maintains optimal performance while delivering high-quality sound through its premium components. The amplifier features a pluggable op amp socket for easy upgrades, making it perfect for those who love to customize their audio experience. Its strong drive power allows it to handle high-impedance headphones effortlessly, ensuring a rich and immersive listening experience. ## Description Douk Audio U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V (U3) ## Features - Wide Input Voltage: Innovative circuit design supports a DC 5-20V wide input working voltage, maintaining an optimal 26V for the amplifier circuit and delivering an excellent background noise index. - High-Quality Audio Components: Features the original TI-NE5532 op amp and a transistor expanding current circuit with 1300mA large current output transistors in Class A status for ultra-low distortion and a warm, delicate sound. - DIY Upgradeability: Pluggable op amp socket design allows for easy upgrades to different op amps, offering DIY fun and enhanced playability for audiophiles and sound enthusiasts. - Mini Size, High Performance: Compact and exquisite design offers great value, providing the power and sound quality to drive most headphones on the market with ease, perfect for home or office desktop audio systems. - Strong Drive Power: Effortlessly drives high-impedance headphones including models like HD580, HD600, HD650, K701, K702, Q701, DT880, T70, T90, SR225, SR325, and RS1e. ## Images ![Douk Audio U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V (U3) - Image 1](https://m.media-amazon.com/images/I/71UI7fJJYCL.jpg) ## Available Options This product comes in different **Model** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ A great little headphone amplifier *by I***A on 11 June 2021* Yes, this Douk Audio U3 really does deserve the five stars.Because my headphones are 150ohm, my PC doesn't have enough grunt to power them properly so I needed an amplifier to do the job. I ordered one which seemed popular but when I tried it there was virtually no amplification on my headphones (I left a review on that one to say as much).After careful consideration I then ordered this Douk Audio U3. It looks great and it certainly works great. It powers my headphones with lots of power to spare and it sounds great as well. The on-off switch is noiseless, by which I mean that you hear nothing through your headphones when you switch on or off. It is certainly a keeper!A word of advice, if you are using the U3 with your PC, don't plug the USB into your computer to power it, you will get noise. I had a power supply and plugged it into the 6 way socket which powers my computer , monitor etc. the noise instantly vanished and the U3 performed perfectly with no background noise at all.edit .. to add that the power supply I am using is a stabilised 12v 1.5A output. I would recommend using any stabilised (can be used on audio equipment) power supply which has an output voltage of 12v and 1A or over (can be up to 5A with no problem).Need a headphone amp? buy this one, from my experience so far, you won't be dissapointed. ### ⭐⭐⭐⭐⭐ Schiit magni killer! *by P***N on 12 September 2023* I have used this little amp for around 2 months now waiting for any initial burn in to settle in.I have purchased and used many headphone amps over the past 3 years, I've had the likes of JDS Atom, Schiit magni, If Zen, Rega etc and this little £40 box of marvels performs incredibly well not just for it's price but compared to amps much more expensive.OK it's a no frills design with basic volume control that has a nice notched movement 6.4mm standard headphone jack and RCA outs on the back panel along with a tactile power switch.This tiny amp is powerful and produces a warm clear sound , pushes decent amounts of detail out.I do recommend upgrading the power source and not to use the included USB powered lead supplied. Most power adaptors will work with this as it has a wide power range from 5 to 20v so play around to see what sounds best for you.Finally you can change the internal op amp as it is of the socketed variety so easy to switch out with no soldering skills required.Easily performs as good if not better than my previously used Atom and Magni.Recommended!!! ### ⭐⭐⭐⭐ Works great *by C***E on 6 February 2025* Nice amp with good build quality and gets very loud ## Frequently Bought Together - Douk Audio U3 Mini Class A Headphone Amplifier HiFi Desktop Home Stereo Amp DC5V (U3) - Amazon Basics 3.5 Aux to 2 x RCA Adapters, Audio Cable for Amplifiers, Active Speakers with Gold-Plated Plugs, 1.2 m, 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.co.uk/products/224227339-douk-audio-u3-mini-class-a-headphone-amplifier-hifi-desktop](https://www.desertcart.co.uk/products/224227339-douk-audio-u3-mini-class-a-headphone-amplifier-hifi-desktop) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-17*