PETROF P 135 K1 Acoustic piano

PETROF P 135 K1 acoustic piano

PETROF P 135 K1 is the tallest upright piano in the PETROF standard series. With a 135 cm cabinet and a 1.222 m² soundboard, it creates a wide dynamic reserve with a powerful, open, and colorful tone.

Highest Series and PETROF tonal character

PETROF's Czech piano-making tradition, dating back to 1864, focuses on creating a soft, rounded, and romantic tone through the use of resonance spruce, a model-specific string scale, and individual voicing. In the Highest Series line, the PETROF P 135 K1 offers bass depth consistent with its height, a singing mid-register, and clear treble.

Resonance spruce soundboard

The resonance spruce soundboard with an active area of 1.222 m² is reinforced with 10 ribs. The profile of the soundboard is designed to translate string vibrations into a wide dynamic range and balanced register transitions. The wet-sand-cast iron plate, multi-layer pinblock, and maple bridges maintain string tension, supporting tuning stability.

Action and keyboard

The PETROF upright action and individually voiced hammer heads ensure fast and precise touch response. The 88 keys create a natural sense of resistance from bass to treble. The left piano pedal softens the tone, the middle moderator pedal reduces volume for silent practice, and the right forte pedal raises the dampers to release resonance.

Construction and daily use

Röslau steel strings, a solid wooden back frame, and a hydraulic soft-close fallboard create a reliable structure for long-term teaching and practice use. The unique music stand design and tall cabinet visually complement the model's concert character.

Main features

• 88-key acoustic piano
• PETROF upright action
• Individually voiced hammers
• 1.222 m² resonance spruce soundboard
• 10 soundboard ribs
• Wet-sand-cast iron plate
• Maple bridges and Röslau steel strings
• Piano, moderator, and forte pedals
• Hydraulic soft-close fallboard

Dimensions and weight

Who is the PETROF P 135 K1 suitable for?

It is suitable for professional pianists, music schools, conservatories, orchestra rehearsals, and large spaces that require powerful acoustic projection.

Exterior finish and technical configuration may vary by market. Technical specifications are subject to change by the manufacturer.