Steingraeber & Söhne B-192 vleugel

 
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Top quality wood

The quality of the wood is of vital importance for a piano maker and Steingraeber & Söhne does not take any risks. It is stored at a carefully controlled and constant humidity of 40%. Steingraeber exclusively uses 'Bergfichte', slowly grown spruce wood with the annual rings close together, for soundboards, at least 250 years old. "The soundboard is not only an amplifier, but also the source of the sound. Therefore, the resonance of the wood must correspond to the register of the piano for which it is used. The solid red and white beech wood used for the combs, after entering the factory it is left to rest for another three years before being processed.
Principles of classical keyboard construction
To achieve optimal results, everything is assembled in the studios at Steingraeber & Söhne, down to millimeters:
Soundboard, bridge and cast iron frame are adjusted to the soundboard and not the other way around. The frame is first coated with paint and from the print on the tuning block (which, depending on the model, consists of 20 to 32 layers of beech wood) you can read whether the connection for optimal communication between the different parts is perfect. All this is extremely important because, as they say at Steingraeber: "the energy from the string must be transferred to the soundboard as efficiently as possible. with as little or no loss as possible." That is why even the smallest detail is not forgotten. For example, the pins that hold the strings in place on the bridge are made from exceptionally hard steel by a specialized company. Sticking the comb is also a job that requires special attention and craftsmanship. At Steingraeber it is still manual work that involves a lot of 'Fingerspitzengefühl'.

Manufacturing process
It's not just about top materials and craftsmanship, time is also an important factor, which according to Steingraeber & Söhne is highly underestimated. At Steingraeber & Söhne, the total production time for a piano takes four months, for a grand piano this is six months.