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Boston Grands

Performance Grand Pianos

Designed by STEINWAY & SONS, employing the unique patents and expertise that have made the STEINWAY synonymous with musical excellence, the BOSTON line of grand pianos represents a singular achievement: a superior playing experience at a price level never before thought possible.


“You can hear the effects of the Steinway & Sons design from one end of the scale to the other.”

BOB WINTER

BERKLEE COLLEGE OF MUSIC

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Specifications and Design

DIMENSIONS

Length: 156 cm (5′ 1½”)
Width: 151 cm (59¾”)
Height: 102 cm (40″)
Net Weight: 311 kg (684 lb)

Rim
Hard Rock Maple inner rim – this is the foundation of the Boston’s tone. Besides providing superior structural integrity to the piano, it enhances tone by being a rock hard foundation for the soundboard. A Maple rim is found only in the finest pianos. Continuous bent rim.  11 outer rim laminations, 17 inner rim laminations. 23 mm (⅞”) outer rim width, 38mm (1½”) inner rim width.

Braces
Radiating braces solidify the piano’s structure. Their triangular layout provides more support than parallel designs. This rigid system improves tuning stability and soundboard crown retention and lengthens piano life. 2 braces + 1 treble.

Pinblock
Octagrip pinblock made of 11 layers of Hard Rock Maple — glued in different grain angles of 60 degrees — affording the tuning pins greater stability under tension and enabling the piano to stay in tune longer.

Soundboard
Close and straight-grained solid (not laminated) Sitka Spruce. Minimum 3 annual growth rings per cm (minimum 8 per inch). Tapered from treble to bass, allowing greater freedom of movement in the bass, and stiffness in the treble, thereby creating a richer and more lasting tonal response. Tapered from 8 mm to 6 mm. Vibrating area: 1.09 m2 (1,683 in2)

Ribs
Made from durable spruce to assure strong and constant support of the strings bearing down on the soundboard. Ribs are fully let-in to the inner rim to support the important soundboard crown and prevent the piano from losing its tone. Number of ribs: 10

Bridge
Treble: Vertically laminated (alternating maple and mahogany) with a solid maple cap, curved to fit the crown of the soundboard. Bass: Solid maple mounted to cantilevered base.

Scale
Overstrung; a combination of agraffe, with front and rear duplex. Rescaled bass and treble for lower tension scale for increased sustain, better tone clarity, and deeper clearer bass. 17,565 kg (38,684 lb) tension.

Plate
Cast from grey iron, bronze-painted and lacquered. Vacuum cast.

Strings
Treble: Highest grade steel (in half size increments). Number of sizes: 13. Lowest tenor note: 33. Mapes Bass Strings: Steel core wire wound with solid copper. Made by Mapes in Tennessee, U.S.A. Note 1 speaking length: 114.2 cm (45″).

Hammers
Premium wool topfelt over premium wool underfelt. Weight of topfelt: 9.5 kg (20.9 lb). Compression-wired to retain permanent shape. Mahogany mouldings. Tapered hornbeam hammershanks. Computer-designed pear-shaped hammers result in a superior tone, increased durability and greater voicing ability.

Action
Solid maple and hornbeam(all wood, no plastic) for all moving parts. Steinway profile-shaped flanges, extruded aluminium action rails for increased stability and less frequent regulation. Steinway action geometry provides a superior touch.

Keys
Genuine spruce, individually balanced and weighted. Synthetic ivory and ebony key covers. New synthetic ebony has ebony-like surface texture and appearance that absorbs perspiration from the fingers. The fine synthetic ivory of the white keys has the same properties of friction, porosity, conductivity, and appearance as ivory.

Pedals
Heavy solid brass castings. Soft, full sostenuto and damper (sustaining).

Architecture

Classic case design. Coved toplid and keyslip, square arm shape with matching square fallboard shape, and wall cornice detail are all classic and beautiful.

Other

  • Fallboard: Soft fall fallboard.
  • Casters: Heavy-duty double-wheel solid brass casters.
  • Locks: Fallboard.
  • Prop Sticks: Double top prop sticks.
  • Bench: artist, adjustable bench (cushion, adjustable height) for all ebony finish pianos.
  • Black Felts for Plate, under Fallboard, and around Pedals on Lyre.

DIMENSIONS

Length: 163 cm (5′ 4″)
Width: 151 cm (59 3/4″)
Height: 102 cm (40″)
Net Weight: 322 kg (708 lb)

Rim
Hard Rock Maple inner rim — this is the foundation of the Boston’s tone. Besides providing superior structural integrity to the piano, it enhances tone by being a rock hard foundation for the soundboard. A Maple rim is found only in the finest pianos. Continuous bent rim.  11 outer rim laminations, 17 inner rim laminations. 23mm (⅞”) outer rim width, 38mm (1½”) inner rim width.

Braces
Radiating braces solidify the piano’s structure. Their triangular layout provides more support than parallel designs. This rigid system improves tuning stability and soundboard crown retention and lengthens piano life. 3 braces.

Pinblock
Octagrip pinblock made of 11 layers of Hard Rock Maple — glued in different grain angles of 60 degrees — affording the tuning pins greater stability under tension and enabling the piano to stay in tune longer.

Soundboard
Close and straight-grained solid (not laminated) Sitka Spruce. Minimum 3 annual growth rings per cm (minimum 8 per inch). Tapered from treble to bass, allowing greater freedom of movement in the bass, and stiffness in the treble, thereby creating a richer and more lasting tonal response. Tapered from 8 mm to 6 mm. Vibrating area: 1.15 m2 (1,776 in2)

Ribs
Made from durable spruce to assure strong and constant support of the strings bearing down on the soundboard. Ribs are fully let-in to the inner rim to support the important soundboard crown and prevent the piano from losing its tone. Number of ribs: 10

Bridge
Treble: Vertically laminated (alternating maple and mahogany) with a solid maple cap, curved to fit the crown of the soundboard. Bass: Solid maple mounted to cantilevered base.

Scale
Overstrung; a combination of agraffe, with front and rear duplex. Rescaled bass and treble for lower tension scale for increased sustain, better tone clarity, and deeper clearer bass. 17,251 kg (38,032 lb) tension.

Plate
Cast from grey iron, bronze-painted and lacquered. Vacuum cast.

Strings
Treble: Highest grade steel (in half size increments). Number of sizes: 13. Lowest tenor note: 27. Mapes Bass Strings: Steel core wire wound with solid copper. Made by Mapes in Tennessee, U.S.A. Note 1 speaking length: 119.4 cm (47″).

Hammers
Premium wool topfelt over premium wool underfelt. Weight of topfelt: 9.5 kg (20.9 lb). Compression-wired to retain permanent shape. Mahogany mouldings. Tapered hornbeam hammershanks. Computer-designed pear-shaped hammers with reinforced shoulders result in a superior tone, increased durability and greater voicing ability.

Action
Solid maple and hornbeam (all wood, no plastic) for all moving parts. Steinway profile-shaped flanges, extruded aluminium action rails for increased stability and less frequent regulation. Steinway action geometry provides a superior touch.

Keys
Genuine spruce, individually balanced and weighted. Synthetic ivory and ebony key covers. New synthetic ebony has ebony-like surface texture and appearance that absorbs perspiration from the fingers. The fine synthetic ivory of the white keys has the same properties of friction, porosity, conductivity, and appearance as ivory.

Pedals
Heavy solid brass castings. Soft, full sostenuto and damper (sustaining).

Architecture

Classic case design. Coved toplid and keyslip, square arm shape with matching square fallboard shape, and wall cornice detail are all classic and beautiful. Violin-shaped topstick.

Other

  • Fallboard: Soft fall fallboard.
  • Casters: Heavy-duty double-wheel solid brass casters.
  • Locks: Fallboard and top locks.
  • Prop Sticks: Double top prop sticks.
  • Bench: artist, adjustable bench (cushion, adjustable height) for all ebony finish pianos.
  • Black Felts for Plate, under Fallboard, and around Pedals on Lyre.

DIMENSIONS

Length: 178 cm (5′ 10″)
Width: 151 cm (59¾”)
Height: 102 cm (40″)
Net Weight: 333 kg (733 lb)

Rim
Hard Rock Maple inner rim — this is the foundation of the Boston’s tone. Besides providing superior structural integrity to the piano, it enhances tone by being a rock hard foundation for the soundboard. A Maple rim is found only in the finest pianos. Continuous bent rim. 11 outer rim laminations, 17 inner rim laminations. 23 mm (⅞”) outer rim width, 38 mm (1½”) inner rim width.

Braces
Radiating braces solidify the piano’s structure. Their triangular layout provides more support than parallel designs. This rigid system improves tuning stability and soundboard crown retention and lengthens  3 braces.

Pinblock
Octagrip pinblock made of 11 layers of Hard Rock Maple — glued in different grain angles of 60 degrees — affording the tuning pins greater stability under tension and enabling the piano to stay in tune longer.

Soundboard
Close and straight-grained solid (not laminated) Sitka Spruce. Minimum 3 annual growth rings per cm (minimum 8 per inch). Tapered from treble to bass, allowing greater freedom of movement in the bass, and stiffness in the treble, thereby creating a richer and more lasting tonal response. Tapered from 8 mm to 6 mm. Vibrating area: 1.30 m2 (2,020 in2)

Ribs
Made from durable spruce to assure strong and constant support of the strings bearing down on the soundboard. Ribs are fully let-in to the inner rim to support the important soundboard crown and prevent the piano from losing its tone. Number of ribs: 11

Bridge
Treble: Vertically laminated (alternating maple and mahogany) with a solid maple cap, curved to fit the crown of the soundboard. Bass: Solid maple mounted to cantilevered base.

Scale
Overstrung; a combination of agraffe, with front and rear duplex. Rescaled bass and treble for lower tension scale for increased sustain, better tone clarity, and deeper clearer bass. 17,445 kg (38,460 lb) tension.

Plate
Cast from grey iron, bronze-painted and lacquered. Vacuum cast.
Tuning Pins Nickel-plated steel, cut threaded.

Strings
Treble: Highest grade steel (in half size increments). Number of sizes: 15. Lowest tenor note: 27. Mapes Bass Strings: Steel core wire wound with solid copper. Made by Mapes in Tennessee, U.S.A. Note 1 speaking length: 135.9 cm (53.5″).

Hammers
Premium wool topfelt over premium wool underfelt. Weight of topfelt: 9.5 kg (20.9 lb). Compression-wired to retain permanent shape. Mahogany mouldings. Tapered hornbeam hammershanks. Computer-designed pear-shaped hammers with reinforced shoulders result in a superior tone, increased durability and greater voicing ability.

Action
Solid maple and hornbeam (all wood, no plastic) for all moving parts. Steinway profile-shaped flanges, extruded aluminium action rails for increased stability and less frequent regulation. Steinway action geometry provides a superior touch.

Keys
Genuine spruce, individually balanced and weighted. Synthetic ivory and ebony key covers. New synthetic ebony has ebony-like surface texture and appearance that absorbs perspiration from the fingers. The fine synthetic ivory of the white keys has the same properties of friction, porosity, conductivity, and appearance as ivory.

Pedals
Heavy solid brass castings. Soft, full sostenuto and damper (sustaining).

Architecture

Classic case design. Coved toplid and keyslip, square arm shape with matching square fallboard shape, and wall cornice detail are all classic and beautiful. Violin-shaped topstick.

Other

  • Fallboard: Soft fall fallboard.
  • Casters: Heavy-duty double-wheel solid brass casters.
  • Locks: Fallboard and top locks.
  • Prop Sticks: Double top prop sticks.
  • Bench: artist, adjustable bench (cushion, adjustable height) for all ebony finish pianos.
  • Black Felts for Plate, under Fallboard, and around Pedals on Lyre.

DIMENSIONS

Length: 193 cm (6′ 4″)
Width: 154 cm (60¾”)
Height: 102 cm (40″)
Net Weight: 374 kg (823 lb)

Rim
Hard Rock Maple inner rim — this is the foundation of the Boston’s tone. Besides providing superior structural integrity to the piano, it enhances tone by being a rock hard foundation for the soundboard. A Maple rim is found only in the finest pianos. Continuous bent rim. 13 outer rim laminations, 17 inner rim laminations. 26mm (1″) outer rim width, 38mm (1½”) inner rim width.

Braces
Radiating braces solidify the piano’s structure. Their triangular layout provides more support than parallel designs. This rigid system improves tuning stability and soundboard crown retention and lengthens piano life. 4 braces.

Pinblock
Octagrip™ pinblock made of 11 layers of Hard Rock Maple — glued in different grain angles of 60 degrees — affording the tuning pins greater stability under tension and enabling the piano to stay in tune longer.

Soundboard
Close and straight-grained solid (not laminated) Sitka Spruce. Minimum 3 annual growth rings per cm (minimum 8 per inch). Tapered from treble to bass, allowing greater freedom of movement in the bass, and stiffness in the treble, thereby creating a richer and more lasting tonal response. Tapered from 9 mm to 7 mm. Vibrating area: 1.47 m2 (2,284 in2)

Ribs
Made from durable spruce to assure strong and constant support of the strings bearing down on the soundboard. Ribs are fully let-in to the inner rim to support the important soundboard crown and prevent the piano from losing its tone. Number of ribs: 12

Bridge
Treble: Vertically laminated (alternating maple and mahogany) with a solid maple cap, curved to fit the crown of the soundboard. Bass: Solid maple mounted to cantilevered base.

Scale
Overstrung; a combination of agraffe, with front and rear duplex. Rescaled bass and treble for lower tension scale for increased sustain, better tone clarity, and deeper clearer bass. 18,313 kg (40,374 lb) tension.

Plate
Cast from grey iron, bronze-painted and lacquered. Vacuum cast.

Strings

Treble: Highest grade steel (in half size increments). Number of sizes: 16. Lowest tenor note: 21. Mapes Bass Strings: Steel core wire wound with solid copper. Made by Mapes in Tennessee, U.S.A. Note 1 speaking length: 142.5 cm (56.1″).

Hammers
Premium wool topfelt over premium wool underfelt. Weight of topfelt: 9.8 kg (21.6 lb). Compression-wired to retain permanent shape. Mahogany mouldings. Tapered hornbeam hammershanks. Computer-designed pear-shaped hammers result in a superior tone, increased durability and greater voicing ability.

Action
Solid maple and hornbeam(all wood, no plastic) for all moving parts. Steinway profile-shaped flanges, extruded aluminium action rails for increased stability and less frequent regulation. Steinway action geometry provides a superior touch.

Keys
Genuine spruce, individually balanced and weighted. Synthetic ivory and ebony key covers. New synthetic ebony has ebony-like surface texture and appearance that absorbs perspiration from the fingers. The fine synthetic ivory of the white keys has the same properties of friction, porosity, conductivity, and appearance as ivory.

Pedals
Heavy solid brass castings. Soft, full sostenuto and damper (sustaining).

Architecture

Classic case design. Coved toplid and keyslip, square arm shape with matching square fallboard shape, and wall cornice detail are all classic and beautiful. Violin-shaped topstick.

Other

  • Fallboard: Soft fall fallboard.
  • Casters: Heavy-duty double-wheel solid brass casters.
  • Locks: Fallboard and top locks.
  • Prop Sticks: Double top prop sticks.
  • Bench: artist, adjustable bench (cushion, adjustable height) for all ebony finish pianos.
  • Black Felts for Plate, under Fallboard, and around Pedals on Lyre.

DIMENSIONS

Length: 215 cm (7′ 1″)
Width: 155 cm (61″)
Height: 102 cm (40″)
Net Weight: 404 kg (889 lb)

Rim
Hard Rock Maple inner rim — this is the foundation of the Boston’s tone. Besides providing superior structural integrity to the piano, it enhances tone by being a rock hard foundation for the soundboard. A Maple rim is found only in the finest pianos. Continuous bent rim. 15 outer rim laminations, 17 inner rim laminations. 29 mm (1⅛”) outer rim width, 38mm (1½”) inner rim width.

Braces

Radiating braces solidify the piano’s structure. Their triangular layout provides more support than parallel designs. This rigid system improves tuning stability and soundboard crown retention and lengthens piano life. 4 radial braces + 3 horizontal braces.

Pinblock
Octagrip™ pinblock made of 11 layers of Hard Rock Maple — glued in different grain angles of 60 degrees — affording the tuning pins greater stability under tension and enabling the piano to stay in tune longer.

Soundboard
Close and straight-grain solid (not laminated) Sitka spruce. Minimum 3 annual growth rings per cm (minimum 8 per inch). Tapered from treble to bass, allowing greater freedom of movement in the bass, and stiffness in the treble, thereby creating a richer and more lasting tonal response. Tapered from 9 mm to 7 mm. Vibrating area: 1.70 m2 (2,625 in2)

Ribs
Made from durable spruce to assure strong and constant support of the strings bearing down on the soundboard. Ribs are fully let-in to the inner rim to support the important soundboard crown and prevent the piano from losing its tone. Number of ribs: 13

Bridge
One continuous bass and treble bridge, vertically laminated (alternating maple and mahogany) with a solid maple cap, curved to fit the crown of the soundboard.

Scale
Overstrung; a combination of agraffe, with front and rear duplex. Rescaled bass and treble wire for lower tension scale for increased sustain, better tone clarity, and deeper, clearer bass. 18,017 kg (39,720 lb) tension.

Plate
Cast from grey iron, rose-gold painted and lacquered. Vacuum cast.

Strings
Treble: Highest grade steel (in half size increments). Number of sizes: 16. Lowest tenor note: 21. Mapes Bass Strings: Steel core wire wound with solid copper. Made by Mapes in Tennessee, U.S.A. Note 1 speaking length: 163.6 cm (64.4″).

Hammers
Premium wool topfelt over premium wool underfelt. Weight of topfelt: 9.8 kg (21.6 lb). Compression-wired to retain permanent shape. Mahogany mouldings. Tapered hornbeam hammershanks. Computer-designed pear-shaped hammers result in a superior tone, increased durability and greater voicing ability.

Action
Solid maple and hornbeam (all wood, no plastic) for all moving parts. Steinway profile-shaped flanges, extruded aluminium action rails for increased stability and less frequent regulation. Steinway action geometry provides a superior touch.

Keys
Genuine spruce, individually balanced and weighted. Synthetic ivory and ebony key covers. Synthetic ebony has ebony-like surface texture and appearance that absorbs perspiration from the fingers. The fine synthetic ivory of the white keys has the same properties of friction, porosity, conductivity, and appearance as ivory.

Pedals

Heavy solid brass castings. Una corda (soft), full sostenuto, and sustain (damper) pedals.

Architecture

Classic case design. Coved toplid and keyslip, square arm shape with matching square fallboard shape, and wall cornice detail are all classic and beautiful. Violin-shaped topstick.

Other

  • Fallboard: Soft fall fallboard.
  • Casters: Heavy-duty double-wheel solid brass casters.
  • Locks: Fallboard and top locks.
  • Prop Sticks: Double top prop sticks.
  • Bench: artist, adjustable bench (cushion, adjustable height) for all ebony finish pianos.
  • Black Felts for Plate, under Fallboard, and around Pedals on Lyre.

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