The Yonberg's innovation

Gamma® Yonberg’s reeds: precision, durability and sonority!

Our D1 and D2 diatonic harmonicas are equipped with Gamma® reeds which are a new technology developed and patented by Yonberg. Completely made in France, these reeds are made in a stainless steel offering excellent mechanical characteristics and high performance.

The registered specific shape of these reeds is very innovative. In fact, in comparison to traditional rectangular reeds fitted to all models on the market, Gamma® reeds are characterized by curvilinear longitudinal sides, associated with an enlarged triangular base.

The unique design® of the Gamma® reeds as well as the very particular mechanical working procedure explain their exceptional durability.

Their degressive shape generates a warm, powerful and very rich in harmonics sound that characterizes the “Yonberg’ sonic signature”.

The Yonberg's expertise


Yonberg D1 and D2 harmonicas deliver superb power and responsiveness.

Power: the innovative channel shape optimizes airflow and the conical comb design allows a huge open end for exceptional sound projection. The comb design also eliminates “reed rattle” on the low end.

Responsiveness: the wide air intakes fitted in the covers and lateraly located outside of the handling areas enable the instrument to freely “breathe” which makes the instrument super responsive, even on the high end.

Ergonomic design

The asymmetrical shape of Yonberg harmonicas offers easy and instinctive handling without the risk of taking the wrong end of the harmonica, even in the dark. Color coded keys and key tab make finding the right key easy.


The index finger fits perfectly into the grooved cover plate, still allowing plenty of room to put the harmonica well into the mouth. Great for tongue blocking and octave playing!

All edges are smoothly rounded and the mouthpiece is slightly curved for additional comfort on the corners of the mouth. The left side of the harmonica has two notches which keeps the harmonica from sliding when holding between the thumb and index finger.


Airflow channels of Yonberg harmonicas are hourglass shaped. This configuration accelerates the flow of air at the middle of the channels, creating a venturi effect which reduces air leakages along the longitudinal edges of the reeds.

Moreover, the bottom of the profiled channels are arranged as a semi-elliptical chamber designed to optimize the flow of air while limiting harmful turbulences at the free end of the reeds.

These design features make Yonberg harmonica extremely airtight. Additionally, the superb fit and finish of the harmonicas enhances the airtight seal. 


The Quick Dismantling System (QDS) concept, developed and patented by Yonberg, is based on the use of very rigid covers connected by three screws passing through the entire instrument which firmly clamps together the comb and the two reed-plates.

To completely disassemble the instrument, simply unscrew the three “big” M3 screws thanks to the screw driver included with harmonica for direct access to reeds for maintenance and adjustment.

Reassembly in reverse direction is just as fast and easy as dismantling.