Steingraeber B-192 wing

 
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Top quality wood

The quality of the wood is of vital importance to a piano builder and Steingraeber & Söhne takes no risks. It is stored at a carefully controlled and constant humidity of 40%. Steingraeber uses exclusively 'Mountain spruce' for soundboards, slow-grown spruce with the annual rings close together, 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 bridges is left to rest for another three years after it arrives at the factory before it is processed.
Principles of classical keyboard construction
To achieve an optimal result, everything is joined together in the workshops at Steingraeber & Söhne to the nearest millimetre:
The soundboard, bridge, cast iron frame are adapted to the soundboard and not the other way around. The frame is first smeared with paint and the imprint on the tuning block (which, depending on the model, consists of 20 to 32 layers of beech wood) shows whether the connection for optimum communication between the different parts is perfect. All this is extremely important because, as they say at Steingraeber: "the energy of 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 of exceptionally hard steel by a specialist company. The stitching of the bridge is also a job that requires special attention and craftsmanship. At Steingraeber, it is still manual work that requires a lot of 'Fingerspitzengefühl'.

Production process
It is not only about top material and craftsmanship, time is also an important factor, which according to Steingraeber & Söhne is greatly underestimated. At Steingraeber & Söhne, the total production time of a piano takes four months, for a grand piano this is half a year.