The Millett Hybrid Mosfet Maxed. This is my first tube headphone amp. I had some wood left over from another project and i love the combination of solid walnut and solid maple. As for the sound, let me just say I am now a vacuum-tube lover as well. Thank you Peter for this wonderful sounding amp, and thank you Tom for supplying the parts for us. Now i can listen to beautiful music while i plan out my 2nd of 3 amps i want to build.