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1. Not inlcincludedde power adapter, recommend to use original high-quality power adapter (DC5V/≥2A ). U10 won't work normally if the current below 2A.FeaturesU10 headphone amplifier with strong power: stereo 3.5mm AUX and RCA inputs, compatible with most audio sources such as MP3, phones, computers, CD players etc.. Dual headphone jacks (3.5/6.35mm) output up to 1100mW, and easily to drive all 18-600Ω headphones; U10 also can be used as a preamp to improve the sound quality for amplifiers or active speakers.Advanced design and HIFI sound: innovative built-in voltage boost circuit, U10 always works at a high voltage of 24V even only powered by DC 5V, the sound with deadly quiet background, amazing purity and transparency, accurate position and wide sound field, easy use and unrivalled sound are both achieved at the same time.Pluggable design with higher playability: 2PCS 6A2 tubes are adopted to soften and warm the audio, sounds real and natural, full and mellow, delicate and sweet. Both tubes and op amps are designed with pluggable socket, convenient for tube rolling, op amp upgrading and sound-shaping, different styles of sound can be enjoyed easily.Excellent manufacturing and most cost-effective: all metal case with good shielding, pure ceramic tube socket with antioxidant contact etc., U10 provides excellent sound and strong power for your headphones in such a mini size, specially suitable for the audiophiles who love listening to vocals, string music, light or classic music etc..Warm tips:1. Not inlcude power adapter, recommend to use original high-quality power adapter (DC5V/≥2A ). U10 won't work normally if the current below 2A.2. Inputs (3.5mm / RCA) and outputs (6.35mm/3.5mm jack) are connected in parallel, in other words, all inputs and outputs work simultaneously. Don't connect 3.5mm and RCA inputs at the same time, or else audio signals will be mixed.3. Pluggable tube socket design, 6A2 can be replaced by the following models:6J1,6ж1П,6AK5,6BC5,403A/B,5654,EF40,EF95,CV850,6J2,6ж2П,6AS6,CV2522,EF11/732,CV4011,6J3,6ж3П,EF96,CV848,6BC6,6AG5, 6J4,6ж4,6136,6BX6,6AC7,EF94,6AU6,6K4,6K5,6K4П,6BA6,6DA6,EF89/93,57494. U10 can easily drive all headphones even with high-impedance such as HD580/HD600/HD650 / K701/K702/Q701 / DT880/T70/T90 / SR225/SR325/RS1e etc.Parameters:Brand: Douk AudioModel: U10Audio input: 3.5mm AUX / Stereo RCAAudio output: 3.5mm / 6.35mm headphone jackTube Model: 6A2 (2PCS)Op amp model: NE5532 (2PCS)Frequency response: 20Hz-30KHzOutput power: ≥1100mW (32Ω)Matched headphone impedance: 18-600ΩSignal to noise ratio: ≥110DBInput voltage: DC 5V (≥2A)Working voltage inside: DC 24VNet weight: 200g / 0.44lbPackage weight: 300g / 0.66lbDimensions (W*D*H): 69*95*30mm / 2.72*3.74*1.18in (not including tubes)Package Dimensions (W*D*H): 132*85*90mm / 5.20*3.35*3.54inPacking List1 × U10 Headphone Amplifier2 × 6A2 Tube1 × Acrylic Board1 × USB to DC Cable1 × User ManualNot included in power adapter, recommend to use original high-quality power adapter (DC5V/≥2A). U10 won't work normally if the current below 2A.To reduce CO2 emissions, this item will be shipped from an overseas warehouse.And as a bonus get yours without leaving your home and without spending on shipping (🌎FREE WORLDWIDE SHIPPING)Smiles 100% guaranteed.If for any reason you’re not absolutely thrilled with the product, you can return it completely free of charge and get a full refund! It’s an unbelievable offer, wouldn’t you agree?
Generating expert take…
Dual emerged from the Black Forest region of Germany in 1907, when brothers Christian and Joseph Steidinger began manufacturing clockwork and gramophone components in St. Georgen. The company adopted its now-iconic name in 1927 after pioneering dual-mode power supplies that allowed gramophones to operate from either mains electricity or mechanical wind-up mechanisms. This innovation marked the beginning of Dual's transition from component supplier to full-fledged audio manufacturer, establishing a foundation of engineering precision that would define the brand for decades.
Dual built its reputation primarily as a turntable specialist, becoming Europe's largest turntable manufacturer by the post-war era with over 3,000 employees across multiple factories. Beyond vinyl playback, the company expanded into cassette players, CD players, and broader consumer electronics throughout the 1970s and 1980s, demonstrating versatility across analog and digital formats. The company's focus on mechanical excellence and stable drive systems earned it recognition as a dependable, quality-focused manufacturer throughout its European heyday.
Today, Dual occupies a fragmented market position following corporate restructuring in the 1990s and subsequent ownership changes. The original German turntable line continues production in St. Georgen under Alfred Fehrenbacher GmbH, maintaining traditional manufacturing standards and appealing to vintage enthusiasts and collectors. Separately, Namsung Electronics markets Dual-branded consumer electronics in the Americas at accessible price points. The brand's legacy rests primarily on its classic turntables, which remain highly sought after by collectors and audiophiles valuing precision engineering and heritage craftsmanship.
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