Black grand piano with open lid and gold accents on its legs

PETROF STORM

The Storm is true to its name, being the piano with the greatest sound potential of the whole Standard Series. It imprints a deep emotional experience within the pianist, and in the hearts of the listeners, that often cannot be put into words. The uniqueness of the moment will strike you as soon as you hear the first sounds coming from this the largest piano in the Standard Series. Its versatility builds bridges across musical genres. It is popular with a demanding clientele and colleges of music, as well as for musical performances at smaller halls and functions.

Top view of a Petrof grand piano showing the open lid, keyboard, and interior strings and hammers.

    • Width - 1525 mm | 5'

    • Length - 1940 mm | 6'4"

    • Height - 1025 mm | 40 3/8"

    • Weight - 365 kg | 805 lb

  • Sound board material - Resonance spruce wood

    Active area (m²)- 1,311

    Ribs (number, shape)1- 2, spherical

    Soundboard construction - wedgewise tapered   9 - 7 mm

    Cast iron plate - Wet sand casting

    Surfacing of iron plate - light gold metallic paint, diamond effect

    Pin block - material - Multiplex beech plywood, density 800 - 850 kg/m3

    Inner rim material - 12 laminas - beech, birch 

    Inner rim thickness - 45 mm

    Wooden frame posts - 4 longitudinal

    Descant post material - spruce

    Cut off bar (corner cross rib) - straight, beech

    Outer rim - material - Sandwich, solid alder wood core, plywood coated, inner veneer Ebony Makassar

    Bridge - treble - solid maple wood

    Bridge - bass - solid maple wood

    Bridge pins - steel - ground tips

    Agraffes material - number - brass, 1-50

    Duplexes - fronth - 1 - c5

    Duplexes - rear - fis1 - c5

    Strings - material - steel wire Röslau Germany, copper winding Degen Germany

    Hitching of plain strings - single

    Dampers - number - 1 - 69

    Action - standard RENNER - PETROF

    Hammer heads - The highest quality hammerheads made in Germany, individually voiced

    Keyboard - Tangential sawn spruce wood, individually balanced with lead

    Black keys - Ebony wood

    Pedals - left - Unacorda (Piano) pedal, middle -  Sostenuto (Prolongement) pedal, right - Sustein pedal

    Legs and castors - standard legs, small unbraked castors

    PETROF sign on right side wall - PETROF

    Felts color - red + black

    Hydraulic slow close fallboard mech. - yes

Close-up view of the interior strings, hammers, and gold-colored metal components of a grand piano, showing detailed craftsmanship.