The AM-1100 has achieved what many thought to be no longer physically possible; what petosa considers to be the art of perfection. The AM-1100 belongs to a class of its own, setting the standard by which all other accordions are compared. Uniquely and individually handcrafted from the highest quality materials through four generations of craftsmen, no accordion is as powerful in sound nor will endure the test of time like an AM-1100. The AM-1100 Concert is designed for the classical and traditional accordionist. A uniquely dry-tuned violin register captures the breathy tone of a non-chambered voice with the melodic resonance of a chambered voice. A smooth and distinct clarity to each note.