First tests of an original Stentorphone sounbox which had not been used in over 100 years. The aim of these tests is to compare the performance and the sound quality between the original and the polymer replica:
1st: Polymer replica
2nd: Polymer replica with 3D printed metal comb valve
3rd: Original Stentorphone Soundbox
4th: Original soundbox with polymer comb valve
Video made by Thomas Theisen, in collaboration with Aleksander Kolkowski.