top of page

P 237 Monsoon

The professional's dream come true

The Monsoon grand boasts a refined, balanced sound, which is best suited to large music halls and recording studios. It has a characteristic romantic tone, and allows musicians complete scope for the expression of their feelings with its faultless action and speed of response. This is an instrument built by the best and most experienced masters of their craft. It represents the optimal balance between size and performance and makes for an impressive addition to a prestigious hotel or any other formal space.

  • Width - 1565mm | 5'1 5/8"

  • Length - 2370 mm | 7'9"

  • Height - 1025 mm | 40 3/8"

  • Weight - 521 kg | 1149 lb


Black, high polish (0801)

Technical Specification

Hydraulic slow close fallboard mech.
Felts colour
red + black
PETROF sign on right side wall
Legs and castors
thick legs, big braked castors
left - Unacorda (Piano) pedal, middle - Sostenuto (Prolongement) pedal, right - Sustein pedal
Black keys
Ebony wood
Tangential sawn spruce wood, individually balanced with lead
Hammer heads
The highest quality hammerheads made in Germany, individually voiced
Dampers - number
1 - 69
Hitching of plain strings
Strings - material
steel wire Röslau Germany, copper winding Degen Germany
Duplexes - rear
g1 - c5
Duplexes - front
d2 - c5
Agraffes material - number
brass, 1-53
Bridge pins
steel - ground tips
Bridge - bass
solid maple wood
Bridge - treble
solid maple wood
Outer rim - material
birch plywood sandwich, inner veneer Ebony Makassar
Cut off bar (corner cross rib)
round shaped, multiple birch or beech
Descant post material
Wooden frame posts
5 longitudinal + 1 cross
Inner rim thickness
50 mm
Inner rim material
12 laminas - beech, birch
Pin block - material
Multiplex beech plywood, density 800 - 850 kg/m3
Surfacing of iron plate
light gold metallic paint, diamond effect
Cast iron plate
Wet sand casting
Soundboard construction
diaphragmatic tapered by CNC shaper 9,5 - 7,5mm
Ribs (number, shape)
14, asymetric
Active area (m²)
Sound board material
Resonance spruce wood
Weight (kg)
Height (mm)
Width (mm)
Length (mm)
bottom of page