Douk Audio U10 Mini Tube Headphone Amplifier, HIFI Stereo Valve Preamp for Home Active Speaker, with RCA AUX Jacks

Almost perfect a real giant killer of a head phone amplifier. But it's also really easy to mod and that's the real gem because it's so cheap to do so. First the russian old stock tubes. But driving my HD800S this little amp falls apart when the music gets busy. Test track hans Zimmer pirates of the Caribbean. Why because it needs more power lots more. As 5v 2A only gives 10W. But I now have 5V and upto 40W available. Now it has plenty of head room hughe soundstage. Next op amp upgrade. I love this it sounds better than something 10 times the cost highly recommend.

This little headphone amp is tremendous value for money. Not only does it sound really good it has no trouble driving the most difficult headphones with it's 1100 mW output. Quality can be improved by op amp rolling if you like to experiment. I replaced the ones in mine with the Burson Audio V5i which made a big difference in the sound quality while still keeping the total cost around £100.

Good info for buyers new to headphone amps. There are two headphone jacks on the Douk U10. 3.5mm and 6.35mm. Yes you can buy adapters but even if they look bling, most of those adapters are bad quality (badly wired internally or a poor fit in the socket) and will cause a lot of noise on this amp (and other amps). You are best connecting with whatever the headphone comes with. If the headphone comes with a 3.5mm or 6.35mm connector then use that. If you really must connect with a 3.5 to 6.35 adapter buy a good one and not an unknown one. UGREEN do a decent cheaper one.

I'm a music lover who never took the headphone road, but as a retirement gift, I got a nice pairs of B&W headphone. I used them with my cell phone for a few months and decided to get a headphone amplifier. The U10 had good review, the price was right and the opamp and tubes swapping was a big plus. The tubes were replaced with nice GE 5654 and the opamp replaced by some discret AKLIAM AK05 (need some extension). The result was so good that I bought some wired headphones, the Hifiman Edition XS. I now enjoy very much what I hear. I don't feel the need to upgrade the headphone amplifier. Note: with the tubes and opamp I use, the U10 is almost dead silent, no background noise. If you get a bad copy, just ask for a replacement, it worth it.

A very nice unit with a very big punch love it

So it may be silly to be in love with a small tube buffer headphone amp but goodness this device is so fun and sounds so good. I just recently bought a good pair of headphones, Kiwi by Linsoul, and I tried a different headphone amp did not like it so I took a chance on this rather inexpensive device. I had a couple of improvements in the tube department so I added those listen to it for a few days and then added two new op-amps. Lme49720. They have a lot of clarity and they work beautifully with the tubes. Currently listening to Fleesh, a great Brazilian band and their tribute album to Marillion. Beautiful. Thank you Douk.

Embalagem excelente, entrega no prazo. Ótimo equipamento, sonoridade muito boa. As vozes, os instrumentos musicais, apresentam-se com nova roupagem!

El producto no es malo sino que está acorde a su precio, es más yo creo que está sobrevalorado. Yo lo devolví porque el sonido que brindaba no me convencía. Muy plano y con falta de agudos por lo que la experiencia auditiva no era la mejor.