Ars Technica

expensive tube amp - DIY from scratch

I don't know how good they are, but you could check out the bottlehead kits. I have not heard them nor tried to build them, so I'm not much help there, but I though you might want to take a look.
ecoustics

The Schiit Audio Folkvangr Headphone Amplifier Uses 10 Tubes and Only 250 Will Be Offered

The Schiit Audio Folkvangr Headphone Amplifier is $1,800 and uses 10 tubes. The limited run of 250 won’t last long. The $1,800 Folkvangr is the most expensive Schiit headphone amplifier so far and an ...
MusicRadar

“You’ll notice when you play it. You hit this pedal on and your amp just becomes huge… It’s just this big, big sound”: EarthQuaker Devices and Dr Z team up for a tub…

The ZEQD-Pre has an EF86 pentode just like Dr Z's sweet high-end amps, and it might just give your rig the analogue warmth, ...
ecoustics

HiFiMAN Goldenwave GA-10 Headphone Tube Amplifier: Preview

The GA-10 is an audiophile-grade headphone amplifier that features the SEPP (single-ended push-pull) circuit with eight vacuum tubes, a linear transformer, and direct tube output. The vacuum tubes ...