UP-118S Performance Edition Piano

Elegance in Vertical Harmony:
Boston UP-118S PE Upright Piano

The Boston UP-118S presents itself as a refined pre-owned upright piano featuring a 45" frame and a captivating satin ebony finish. Constructed with designs inspired by Steinway & Sons for exceptional sound and performance, it is complemented by an extended 5-year manufacturer warranty for added assurance.

Introduced in 1992, Boston is the name of Steinway’s middle line of pianos, designed and built by Kawai to Steinway’s specifications. Except for the UP118S, manufactured in Indonesia, all other Boston pianos ending in E are crafted in Japan. Dimensions: 46.5″x59″x23.5″ or 118cm x 147cm x 59cm Available Finishes: Polished Ebony, Mahogany or Walnut, Satin Ebony, Walnut, Black Oak, Honey Oak or Mahogany. Model UP118S PE is the school institutional model, while the UP118E PE is the decorator edition.

BOSTON UP-118S PE features

  • Staggered spruce back posts
  • Octagrip® Pinblock
  • Solid Spruce Soundboard
  • Solid maple bridges with cantilevered base
  • Steinway specified hammers 20.8 lbs. top felt
  • Solid maple action
  • Aluminum action rail
  • Spruce keys
  • Solid brass hardware





String Scale








Height: 132 cm (52")

Width: 154 cm (60½")
Depth: 67 cm (26¼")

Net Weight: 300 kg (661 1b)

Cabinet Style: European
Finish: High Polish: Ebony
Hardware: Solid brass — polished and lacquered

Mahogany foot-piece soundboard lining and backboard. Specially-designed grand-type mahogany closing rim; unequaled vertical strength and stability and improved acoustics. Backposts have staggered spacing to enhance tone and provide support where needed.

Full-length laminated spruce posts assure that the backframe will remain straight and consistent and tuning will remain stable. Spruce fill-blocks between posts at the top and bottom of the backframe, capped with a maple backboard for positive vertical alignment. Solid filler blocks (no hollow spots). 5 posts. Total cross sectional area: 450 cm2 (69.8 in2). Thickness of post: 9 cm (3½"). Width of post: 10 cm (4").

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.

Close and straight-grain solid (not laminated) spruce. Minimum 3 annual growth rings per cm (minimum 8 per inch). Tapered from treble to bass, to provide a rich tone in the bass, and a brilliant and crisp tone in the treble, creating a well-balanced and lasting tonal response. Tapered from 9 mm to 8 mm. Vibrating area: 1.14 m2 (1,767 in2). Closing rim evens out the soundboard's response to all frequencies, eliminating "hot" spots. Emulates shape of grand soundboard.

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 liner to support the important soundboard crown and prevent the piano from losing its tone. Number of ribs: 11

Treble: Solid maple, curved to fit the crown of the soundboard. Bass: Solid maple mounted to cantilevered base. Doweled, glued, and screwed to soundboard. One continuous base and treble bridge.

Overstrung: Lower tension scale for longer sustaining tone and longer life of the whole piano. 16,104 kg (35,428 lb) tension.

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

Treble: Highest grade steel (in half size increments). Number of sizes: 13. Lowest tenor note: 30. Bass: Steel core wire wound with solid copper. Number 1 speaking length: 121.7 cm (47.9")

Premium wool topfelt over premium wool underfelt. Weight of topfelt: 9.4 kg (20.8 lb). Compression-wired to retain permanent shape. Mahogany moldings. Hammer-shanks from select resilient maple or horn-beam. Computer-designed pear-shaped hammers with reinforced shoulders result in superior tone, increased durability and greater voicing ability.

Solid maple (all wood, no plastic) for all moving parts. Extruded aluminum action rails for increased stability and less frequent regulation. Dependable direct-blow design.

Genuine spruce, individually balanced and weighted. Synthetic ivory and ebony key covers. Length of key: 40.3 cm (15.9").

Made from laminated hardwood. Strong, rugged construction provides a solid mount for the keyframe and action allowing for precise and prolonged action regulation. Keybed thickness is 42 mm.

Spruce with hardwood inserts in the balance rail and front rail for added stability.

Soft (half-blow), muffler, and sustaining (damper) pedals.


  • Music desk: Professional music desk.
  • Two-position upper panel for tone escapement and solid music support.
  • Fallboard: Soft fall fallboard.
  • Casters: Solid brass casters.
  • Prop Sticks: Top prop sticks.
  • Bench: Matching wood-top bench.