2011, Spitfire

This is the Spitfire R-2 Sheldon headphone design, in wood.

Specifications:
Trumpet Diameter: 40 mm
Impedance: 32 Ohm
Sensitivity: 119 +/- 3 Db/mW
Frequency Response: 20-20,000Hz
Rated power: 10 mW
Max power: 20 mW
Plug: 3.5 mm stereo