K-52 Professional Upright Model
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K-52 Professional Upright Model Description
Introduced in 1903, this piano features a soundboard larger in area than many grand pianos, for a larger and more resonant voice. Height: 52″ (132cm)
Features and Benefits
For more than a century and a half, the world’s most accomplished pianists have preferred to express their musical genius on Steinway & Sons pianos. The list includes the giants in classical, jazz, and popular music; the men and women who have shaped the world’s musical heritage. Today, more than 98 percent of the world’s active concert pianists choose to perform on Steinway pianos. The joy of playing and owning a Steinway piano, however, is not the exclusive domain of the virtuosi. Rather, it is a world open to all who share a love of music, fine craftsmanship, and enduring quality.
That which distinguishes Steinway pianos, more than all else, is summed up in our dedication to a single ideal: make the finest pianos in the world. It has never entered our minds to compromise quality. Where some have substituted mass-produced, synthetic components to speed production or reduce costs, we apply technologies and new materials only when they provide proven enhancements in the piano. We adhere to these principles for one reason — compromise quality, and you risk the sound, the touch, and ultimately, the integrity of the instrument.
Unlike other manufacturers that mass-produce their uprights, Steinway & Sons uprights are handcrafted in the same factory as our grand pianos, using the same techniques, conditioning processes, and craftsmen. The result is the world’s finest upright, living up to the Steinway & Sons name in every respect. Our upright pianos take advantage of over 125 patented features and processes, including our patented Diaphragmatic® soundboard, Accelerated Action® and Hexagrip® pinblock.
Back Frame: Solid birch mortised foot-piece. Solid birch soundboard lining. Grand-type maple laminated closing rim; unequaled vertical strength and stability.
POSTS: 5 FULL-LENGTH tapered solid spruce with a volume of 3,600 cu. in. (58,993cm3); Assures that backframe will remain straight, promoting stable and consistent tuning. Strategically positioned with bottom ends tenoned into birch foot-piece for positive vertical alignment. Spruce fill-blocks between posts at top of backframe capped with solid birch backing board for positive horizontal alignment.
Hexagrip patented design; 7 laminations of quartered hardrock maple stock. Grain symmetrically distributed at successive angles of 45°, 90°, employing grain direction uniformly around the circumference of the tuning pin to provide the ultimate in pin grippage. As a result of this exclusive design, the tuning pin has smoother movement under torque, a more uniform retaining action for solid setting, and a piano will hold its tuning longer.
Created like the soundboard of violins to give a free and even response throughout the entire scale, it is so constructed as to be 8 mm thick in the center and tapered to 5 mm as it approaches the rim and outer case before being DOUBLE CROWNED. This design permits complete freedom of movement, while acting as a homogenous unit to displace a greater amount of air, thereby creating a richer and more lasting tonal response. Close-grained, quarter-sawn Sitka spruce, a wood having unusual stability and vibrance under stress and vibration, is used exclusively for the soundboard.
Made from durable, resinous sugar pine to assure strong and constant support of string down-bearing on the soundboard. Rib ends are hand-fitted into their mounting surfaces virtually locking in the important soundboard crown.
Treble: Hard rock maple vertical laminations capped with solid hard rock maple; planed to prescribed height, graphite coated, drilled, and notched by hand for precise individual string bearing. Design defies splitting.Bass: Rock maple base cantilevered at angle for maximum resistance to string pressure. Maple doweled, glued and screwed to soundboard.
Overstrung; twenty-six note bass/tenor break. Treble duplex. Tension: 37,500 lbs. (16,875 kg)
Sturdy gray iron; filled, CNC-milled, and sealed; bronzed and lacquered.
Premium blued steel with rust-resistant, nickeled heads.
Treble: Ten whole & one-half sizes from high-tensile Swedish steel.Bass: Swedish steel core wire wound with pure copper. Longest, pressure bar/bridge: 46 3/8″ (118 cm)
Premium wool top felt over premium wool under felt; treated to resist insects and moisture. Compression-wired to retain permanent shape. Hard rock maple hammer moldings and shanks.
Vertical-cut premium wool for effective dampening. Hornbeam heads for endurance.
White, quarter-sawn hornbeam parts are bushed with specially treated wool action cloth for freedom from friction. Parts are anchored in hard maple rails. Dependable, Direct-Blow design permits ALL parts of the action to lie above the brass capstan screws.
European spruce, individually weighed-off. Chip-proof, stain-resistant coverings for naturals; slip-proof, delicately abraded ebonized sharps. Tough, durable Linden wood buttons reinforce keys over balance rail permitting maximum tonal power with every strike. Longest: 16 1/8″ (40.9 cm)
Made from planks of stable, quarter-sawn poplar. Horizontal planks are freely mortised together, while their ends are permanently mortised into vertical planks made of birch, presenting a vented system for humidity escapement while allowing for necessary expansion and contraction. Hand-milled to be flat and true correlating with keyframe for snug fit. Strong, rugged construction provides a solid mount for keyframe and action allowing for precise and prolonged action regulation. Thickness: 1 3/4″ (4.45cm)
Heavy, solid brass. Soft, sustaining, and full sostenuto.