P 237 Monsoon grand piano
P 237 Monsoon grand piano
The P 237 Monsoon concert grand piano is ranked among the series of master built instruments. It is suitable for music halls, recording studios, but also demanding individual players. It produces a romantic sound and can be beautiful accessory within the home or prestigious hotel.


ground view
a 1565 mm ° 61,61"
b 2370 mm ° 92,91"
height Height - 1014 mm ° 39,92"
weight Weight – 460 kg ° 1012 lb
P 237 Monsoon
Length   (mm)    2370 mm (93,31 inch)
Width     (mm) 1565 mm (61,61 inch)
Height   (mm) 1030 mm (40,55 inch)
Weight   (kg) 460 kg (1014 lb)
Sound board material solid resonance spruce wood
Active area (m2) 1,616
Ribs (number, shape) 14, asymetric
Soundboard construction diaphragmatic
Cast iron plate wet sand casting
Surfacing of iron plate                      light gold metallic paint, diamond effekt
Pin block - material multiplex beech plywood
Inner rim material beech, birch 
Inner rim thickness 50 mm
Wooden frame posts 5 longitudinal + 1 cross
Descant post material beech wood
Cut off bar (corner cross rib) round shaped, multiple birch or beech
Outer rim - material birch plywood sandwich, inner veneer  Ebony Makassar
Bridge - treble solid maple wood
Bridge - bass solid maple wood
Bridge pins steel-ground tips
Agraffes material - number brass, 1-53
Duplexes - front d2 - c5
Duplexes - rear g1 - c5
Strings - material steel wire, copper winding
Hitching of plain strings  single
Dampers - number 1-69
Action top quality european action
Hammer heads top quality felt hammer heads
Keyboard spruce wood, individually balanced keys
Keys balancing, touch weight  55g in bass - 50g in treble
Black keys Ebony wood
Pedals Unacorda (Piano) pedal, Sostenuto (Prolongement) pedal, Forte pedal
Castors brass, braked castors 
PETROF sign on right side wall PETROF
Felts colour red+ black
Hydraulic slow close fallboard mech. yes
P 237 Monsoon - detail
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