mh3kSurprisingly not bad. I've been having pretty good luck with these hand built Chinese tube amps.
It is a fairly balanced sounding amp with no hum, buzz, or audible annoyances. The use of a pair of 6SN7 and a single 12AX7 tubes is pretty awesome. There are huge numbers of NOS available for both types, and the current production for both are also not horrible. As I already have a huge pile of tubes, I bought the version that did not come with any. No point in getting tubes I'd replace right away.
Headphone compaibility is pretty great too, with the amp being good down to about 16Ω and all the way up to at least 600Ω. It has enough power on tap to drive most all Planar cans too. So far I've run my HE-4xx, HE-5xx, HE-X4, HD58x, HD6xx, ATH-R70x, T1.2, 99 Noir, and Elex on it with good results. It is transformer coupled, so there will be a bit of loss in the bass side of things, but the transformers are suitably large enough that it isn't too big of a loss. I didn't try any of my IEM on it, but I've a feeling they'd work fairly well.
I also did try running it as a preamp for the unbalanced side of my solid state amps, and it wasn't horrible. Definitely better sounding than most of the cheapy cathode-follower style 6AK5, 6N1, and 6SN7 pre-amps and buffers I've tried.
The lack of blue LED is one of the best things about it visually. The only power indicator light (other than the tubes) is a dull red LED showing the selected max Ω of the cans. I don't really like the chassis they used, especially the dimensions and styling, but it is rather solid. The black version uses the same scratch magnet black finish that all of the Drop gear does.
Overall, I do not regret it one bit. Shipping cost sucks, but heavy amp is expensive to ship half-way around the world. I picked mine up from the Weiliang Audio store on Aliexpress. If you end up buying it there, just tell them what voltage you need (110/220) as a note during order.
Though it's tiny, it manages to power even high ohm headsets with amazing accuracy. It works great with the drop usb-c to usb-c and my Phillips shp-9600. Soon enough I'll be using the Akoustyx...
I have an external amplifier with no integrated DAC and I only have an xduo xa10 as a dac/amp can I use the xduo xa10 as a dac only with an external amplifier?
So I bought the HD6xx a few weeks back and when I finally got the packages i got some Noir 99. ever happened to any of u guys and how did it get resolved