Warning: China-Hifi-Audio.com

Not yet. I opened it originally to check bias because the instructions didn't provide a meter reading-to-bias current description, at least not in English. I opened it a second time to add a couple of bypass capacitors because I've come to the conclusion that electrolytic capacitors and diode switching is responsible for much of what we call electronic/solid state sound. I was afraid to use my meter to check voltages because it's not rated for the 1000 volts 845 tubes usually run at. (Of course I could have checked filament voltage, but I forgot.) I've since removed my head from my butt and remembered that I could measure voltage drops across various components to deduce the rail voltages, but I haven't opened it again yet, too busy listening to music and shaking my head that I own something this cool. The only problem with this amp is the rectifier tube arcs on startup with some of the different 12AX7 tubes I've tried. It looks like the input stage and possibly the 300B drivers are tube rectified, while the 845s are rectified via solid state diode strings. I think the first capacitor following the rectifier is too large, but the power supply components are on a circuit board and it requires a bit of effort to get to the solder side to see "what's doin". I'll check soon.

300B and 845 filaments are 5 and 10 volts respectively. B+ for 300B and 845s is 260 and 945 volts respectively. 12AX7 and 6SN7 heater voltages are 12.6 and 6.3 volts. I fully expected the voltages to be "close enough", but they were essentially perfect. I forgot to mention that I unscrewed one of the output transformers thinking the enclosure was hollow and a small output transformer was hiding inside. Nope. Large potted output transformers. This is all in reference to the Willsenton r800i 300B 845. I have paid a lot more for a lot less. I feel like I stole the damn thing at the price it's being sold for. Mine was a return so it was $400 bucks cheaper and had a couple of small scratches on it. The tube complement alone could easily cost half the price of this amp. The other Willsenton amps that have been reviewed by the online and YouTube community have gotten similar great reviews. 

Hmmm. But what about all of your cell phones and computers, and washing machines and refrigerators, all built in China? Are you simply looking the other way and holding your nose while using your cell phone? Seems a bit hypocritical to bash Chinese built gear and classify it as poor. Some is excellent. I’ve a Grant Fidelity sponsored Shuguang tube kt88 integrated whose sound I’d put up as an extremely solid 8 of 10 sound and build wise. Critics!

I wonder if the person returning it lived just down the road from you. Could have saved some postage! 

@cocona that’s excellent to hear. It’s always worthwhile checking, if only for peace of mind. i hope it fulfils your expectations.