The new Harmonia v4 - 45, 2A3, 300B output stage for source components

[Response Audio]

Introducing the new Harmonia V4. The v4 is designed as a DHT output stage for your DAC, CD player, etc. The v4 can. Low accommodate the 45, 2A3 and 300B with the only adjustment needed by the user is the filament voltage that ranges from 2.5V to 5V. An internally mounted LED meter allows you to quickly make the change.
Using the Harmonia after a DAC or CD player provides you with the seductive SET sound for all your source components.
Not a cathode follower 'buffer' stage rather a true anode follower allying you to experience the full sound of the tube.

https://responseaudiony.com/harmonia-v3-1

[Nick B]

Simple and stylish and adjustable as well. Nice design, Bill. What type tubes are those?

Nick