NO SOLDERING REQUIRED
So you want to build your own little amp but aren’t that technical. Then check out the new Korg HA-S Nutube Headphone Amplifier Kit. An assembly style build, the headphone amp is a great first step into hobby electronics. The amp has a Korg designed Nutube (an analog vacuum tube) and “NFB (Negative Feedback) switch, that allows you to choose from a high fidelity clean and pristine sound, or a warmer, more harmonically rich sound as expected from a vacuum tube”.