Performance combs

The performance custom combs give the harmonica a performance boost. They feature unique aerodynamic formed slots which increases the speed of the airflow, causing easier bending and overblowing. Players describe a louder and crisper sound. The combs can be equipped with a unique internal brass-tube resonator system. The resonators connect the brass element of the top and bottom reed plates and enhance the vibrations and overtones. We do recommend that you flat sand the draw reed plate for best results.

They also feature 3 different chamber widths,

The lower octave have wider and bigger chambers allowing more air to pass through, this increases the volume of the lower octave.
The middle octave have the same chamber width as the previous performance combs.
And the top octave feature narrower and smaller chambers which increases the response and thus making bending easier.
When the comb is mounted in the harmonica, you can’t see or feel the difference in chamber size, as the outer part of the comb has the same size as before.