Bosendorfer Piano Features

 

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Find Other Pianos Sold in Colorado. Discover their history and their ages, More Bosendorfer- Frequently Asked Questions,
More about Bosendorfer Piano Company and History, Bosendorfer Features, Bosendorfer Materials and Craftsmanship,
Bosendorfer Piano Ages

Bosendorfer Piano; Design and Construction

What makes a Bosendorfer a Bosendorfer and why is it so expensive?

The cost, characteristics and outcome of any piano breaks down into the following factors. There is the design and planning of what the instrument is to become, the materials that will be used in constructing it and the craftsmanship goes into building it. These fundamental factors lead to other common questions.

High Quality=High Cost.
What contributes to the higher cost? What can make a piano so expensive?

Philosophy, design, materials and workmanship dictates the Performance (quality of sound & touch) (and the cost).
  • Bosendorfer Philosophy is "To give the artists and music lovers of the world an instrument which fulfills their highest expectations."
  • Bosendorfer Philosophy is "To build the world's finest piano, regardless of price!"
  • Bosendorfer Philosophy is "the tone that sings forever"
  • Bosendorfer Philosophy is design and build a "hand-built" piano - this philosophy (technology) does not transfer to an assembly line process.
  • Bosendorfer Philosophy is "heirloom quality"- built to last for generations (with appropriate re-manufacturing) What is the Bosendorfer Design?
  • Piano rim, beam, and case structure is all made of soundboard grade Bavarian spruce wood which supports the design concept of "singing tone".
  • 85% of the wood in Bosendorfer is spruce which is a light, strong, and resonant wood.
  • Using the same material gives more uniform expansion and contraction.
  • The inner rim is designed to be natural and free as opposed to continuous rims which are stressed and pressed.
  • The case is designed to be an extension of the soundboard and will therefore resonate and amplify with it. How is this accomplished?
  • More time consuming manufacturing process.
  • Higher materials cost.
  • Inner rim is built of solid spruce blocks much like a brick layer building a wall.
  • The inner rim is very massive.
  • Bosendorfer building process requires experienced workers.
  • Outer rim is kerf cut spruce designed to vibrate and sing with the soundboard.
  •  The kerf cuts are later filled with spruce shims, a time consuming process.
  • The outer rim is very thin like the soundboard.
  •  The superstructure of piano designed for stability.

Heavy cross-beam design is very similar in concept to Mason & Hamlin tension resonator.

  • Keeps the case from spreading which holds the crown for years.
  • Beam structure is all interlocked and doweled.
  • Soundboard Design is different from other manufacturers.
  • Does not follow 90 principal; i.e. ribs being 90 to grain of soundboard wood which runs parallel to straight-line of bridge.
  • Soundboard wood is tongue and groove construction to give added strength and deter cracking due to climatic changes.
  • Bass bridge has holes like violin bridge to reduce mass and create more sensitive bridge.
Another feature is the Independent Capo d'astro bar It enables the following.
  • Precise adjustment possible.
  • Capo d'astro is the place you frequently get warpage in the casting even on other premium quality pianos (Steinway).
  • This allows precise adjustment of distance from key bed to string which affects action geometry, regulation, and touch.
  • It is removable which allows rebuilders to easily service and restore accurate down bearing for future generations.
  • Individual stringing for added stability.
  • Breakage only effects 1/3 of power, not 2/3 4. Tapered tuning pin holes allow greater tuning stability over a longer period.
  • Pin block is specially manufactured to give both strength and stability and a good feel for the tuner. They use quarter sawn maple and delignit where needed.
  • Dampers under levers have double elbow for accurate adjustment and improved performance.
  • Extra notes contribute to the richness and clarity of tone through the sympathetic vibrations (harmonics) they produce, even when they are not being played.
  • Model 290 has 9 extra notes.
  • Model 213,224, and 275 have 4 extra notes.
Extra notes were first added for Ferruccio Busoni in the late 1800's. Musical advantages of extra strings are:
  • Wider soundboard adds to resonance.
  • Bridge placement toward center of soundboard gives greater freedom of tone to bass and tenor strings and added sustain.
  • Additional Resonance and harmonic richness from added strings.
 
 
 
 


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