I have developed the resonance chamber system in 1994.
This is a chamber in the upper part of the soundboard, firmly glued in under the fingerboard with its own small sound hole on the treble side of the guitar. The resonance chamber ensures that the guitar sounds balanced in all positions by increasing the overtones. This creates a clear and sharp sound.
Classical guitar with resonance chamber
system. East Indian Rosewood / Spruce
Back: Brazilian Rosewood Soundboard: Sitka Spruce Back: East Indian Rosewood
Classical guitar with cutaway and resonance chamber system. Maple, stained / Sitka Spruce