Premium Solid Spruce Soundboard
All the finest pianos have premium solid-spruce soundboards, but spruce soundboards are not created equal. A premium soundboard will be made of straight-grain solid spruce (not laminated) with a minimum of 8 grains per inch and be free of knots and irregularities. These qualities ensure overall structural integrity and even distribution of vibrations. Most manufacturers do not specify anything beyond solid vs. laminated, allowing for a wide variance in wood quality.
Tapered Soundboard Construction
To promote flexibility, the soundboard is sanded down to be thinner from treble to bass. Because the board is able to vibrate more freely, bass notes sound richer and fuller and overall tone and dynamic range is improved.
Vertically Laminated Bridges
Originally patented by Steinway in 1880, this groundbreaking design is now found in nearly every high-performance piano in production. The solid bridge is replaced with multiple layers of wood, like a layer-cake on its side. This design transfers vibrations from the strings to the soundboard most efficiently and with the least loss of energy. This improves every aspect of tone, projection, sustain, and dynamic range.
Hammers with Underfelt
Dense under-felt is applied before the white hammer felt is glued and fastened to the hammer molding. This reinforcement will help the hammer retain its shape through years of impact with the strings. Often overlooked and not something that will cause an issue right away, this is a feature many manufacturers will eliminate in order to cut costs.
Maple Inner & Mahogany Outer Rim
Boston grand rims are unique in their class. The hard-rock maple inner rim of Boston grands is made of the same material that is largely responsible for the longevity and performance of STEINWAY & SONS grand pianos. Rim construction requires a dense, rigid material to maintain the soundboard crown and keep vibrations within the soundboard where they can contribute to projection, sustain, and tone. The Boston rim has WIDE TAIL DESIGN, …more
Duplex Scale Design
Originally patented by Steinway in 1872, similar designs are now implemented in countless performance grands. Each treble string is sectioned into three separate vibrating lengths. The longest is in the middle and this is the main note we hear. The duplex sections on either end are tuned to upper harmonics of the main note. This design greatly enhances the complexity and richness of the tone and increases the strength of the very highest notes.