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Advantages of the construction and materials used in the Master Grand Piano PETROF I Mistral

Rim
Petrof original. Inner rim – laminated solid beech, birch, 13 lamels Outer rim – laminated maple plywood. Total thickness 8,4 cm. The great thickness of the outer rim is one of many advantages of Petrof’s grand pianos. It gives them strength, solidity and stability. Mistral’s inner wooden frame ensures high and long-term stability of tinning and action regulation as well as sound board crown stability, which is a presumption for perfect performance.

Frame posts
5 Spruce posts, 2 cross posts. Connection – fish-tail + beech dowels. A total of 7 frame posts provide a high contour stability of the frame, stability of tuning and regulation.

Legs
Petrof original. Solid beech core, solid alder outer lining, gabon counter veneer, outer decorative thin veneer. The robust construction of the legs ensures high stability of the instrument when played.

Iron plate
Czech producer. Gray cast iron, hand worked, numerically exact drilled, lacquered. Numerical exactness of drilling ensures high exactness of diapason. High exactness of diapasons of strings and duplexes which is ensured by numerical drilling provides optimal conditions to strings for clear, exact tone.

Iron plate support
Steel adjustable bolt between cross block of wooden frame and iron frame. The steel adjustable bolt increases form stability of the iron plate and consequently the Mistral’s tuning stability.

Hardware fittings
Petrof original. Solid brass, polished, lacquered. P I Mistral’s hinges and fittings are easily compared in quality to the highest class models of our competitors. The hardware fittings are corrosion resistant, therefore they do not require any maintenance.

Pinblock
Special beech plywood type Multiplex, original veneer thickness 2 mm compressed to the density 800-850kg/m3 (= 6 veneer layers/cm), high moisture resistant glue. The pinblock has high resistance against atmospheric changes (e.g. humidity). It provides equal torque of tuning pins, which results in particularly high stability of tuning.

Soundboard
Petrof original. Tapered in rear and right section. Thickness 9 mm in the center, tapered to 7 mm, spheric crown. Made from European mountain spruce. Traditionally shaped sound board gives high acoustic performance in all frequencies of the whole range. Its construction greatly contributes to generating the typical tone of PETROF grand pianos.

Ribs
Petrof original. Ends hand fitted, circular shaped, made from European mountain spruce. Straight rib. The formation of the sound board and ribs ensure high acoustic performance in all frequencies of the whole tone range. The P I Mistral grand piano can be used even in the biggest concert halls.

Bridges
Petrof original. Treble – solid beech, hornbeam cap. Bass – solid beech, hornbeam cap, lightened by holes, cut bottom. Bridges graphite coated, hand notched and bored. The original lightened and elastic construction of the bass bridge enables an extraordinarily excellent sound of the bass tones.

Scale
Agraffes, front and rear tuned duplexes. Duplexes enriches the tone colour of the grand piano Mistral.

Strings & Tuning pins
Steel wire Mapes USA, Röslau Germany. Copper Degen Germany. Longest string 2080 mm. Steel, nickeled. Strings used in the P I Mistral grand piano are made from string wire of the world’s best quality. The tuning pins are of the best quality and they are corrosion resistant.

Hammer heads
Abel Germany, walnut or hornbeam mouldings. Hornbeam hammer shanks. Abel premium under felt and top felt. Hammer heads Abel, which are fitted in this instrument, are ones of the best worldwide. They enable the player to get a great variety of tones.

Dampers
Renner Germany. In this grand piano dampers are used which are produced by the German company Renner. These dampers are considered to be one of the best worldwide.

Action
Renner original Germany. Wippen rail vertical Multiplex plywood. Hammer rail solid beech wood. Hornbeam action parts. The Renner action is generally rated as one of the best. It is reliable, equally quick and it is the most frequently used action in grand pianos of world class quality.

Keys
Petrof original. European spruce, white acrylic tops – Polyplex. Sweden Black key tops – genuine ebony wood. Individually balanced keys. Grand piano P I Mistral has keys of European origin, each key is individually balanced. The quality has been proved by more than 140 years of production tradition. The ebony wood used for the black keys provides a very pleasant feeling whilst playing.

Key bed
Petrof original. Spruce sandwich board, beech veneered. Solid beech insert in lyre and legs zone. Thickness 47 mm. The robust key bed is another component which ensures regulated stability of Mistral’s action as well as stability of the whole instrument while being played dynamically.

Pedals
3 pedals, solid brass. Construction, materials and function of P I Mistral’s pedals are comparable in quality with the highest class pianos´ pedal mechanisms.

Advantages of the construction and materials used in the Master Grand Piano PETROF 237 Monsoon
Rim
Petrof original. Inner Frame is laminated from 13 layers of solid beech and birch lamels. Side wall is laminated from birch plywood lamels. Total thickness of side wall of piano is 7,8 mm. The solid construction of the rim the P 237 Monsoon grand piano ensures high and long term tuning stability and action regulation as well as sound board crown stability which is a prerequisite for perfect performance.

Frame posts
Wooden frame is reinforced by 4 longitudinal and 1 cross solid wood posts. A total of 5 frame posts provide a high contour stability of the frame, stability of tuning, regulation and a colour of tones.

Legs
Petrof original. Solid beech wood central core, alder wood outer shell, gabon thick counter veneer, top thin veneer. The robust construction of the legs ensures high stability of the instrument when played.

Iron plate
Czech producer. Gray cast iron, hand worked, lacquered. Window construction in pin block zone.
The construction of the iron plate is fully comparable in quality with the highest class pianos. Tuning pins are built-in deep into a pinblock. The construction of the iron plate provide extraordinary tuning stability.

Hardware fittings
Petrof original. Solid brass, polished, lacquered, stain resistant. Hardware fittings are corrosion resistant, therefore they do not require any maintenance. It is easily compared in quality to the highest class models of grand pianos.

Pinblock
Special beech plywood Multiplex type. Original thickness of veneers 2 mm. Compressed to 6 layers/1 cm of thickness. Compressed to the density of 800 – 850 kg/m3. Glued by high moisture resistant glue. Top surface veneered by mahogany veneer. The pinblock in this grand piano has a high resistance against atmospheric changes (e.g. humidity). It provides equal torque of tuning pins, which results in particularly high stability of tuning.

Soundboard
Petrof original. Soundboard is made from solid Middle European spruce. Traditionally tapered to the wedge from 9 mm in bass and front edge to 7 mm in back and descant arc. The board has a spheric crown. Traditionally shaped sound board gives high acoustic performance in all frequencies of the whole range. Its construction greatly contributes to generating the typical tone of PETROF grand pianos.

Ribs
Petrof original. Ribs are made from solid European spruce wood, Traditionally circular shaped, hand fitted. The main cross rib is made from solid spruce wood, it’s straight, hand crowned. Traditional shape of the sound board and of the ribs gives a great acoustic performance in all frequencies across the entire tone range. The P 237 Monsoon grand piano sounds middle concert hall.

Bridges
Petrof original. Descant and bass bridge is made from solid beech wood, top cap from hard hornbeam wood. Bass bridge is lightened by holes. Lower bottom is cut to the holes for better elasticity. Top caps are graphitized. Bridges are hand worked and bored. Solid hornbeam wood enables a perfect transmission of higher frequencies. Original lightened and elastic construction of the bass bridge enables a maximal resonance of the sound board and an extraordinarily excellent sound of the bass tones.

Scale
Strings run through the agraffes. The construction of agraffes is fully comparable to the world class grand pianos.

Strings & Tuning pins
Steel wire Mares USA or Röslau Germany. Copper Degen Germany. The longest bass string 1710 mm. Nickeled steel, stain resistant. Strings used in the P 237 Monsoon grand piano are made from string wire of the world’s highest quality. The tuning pins are of the finest quality, corrosion resistant and fully comparable to the best brands.

Hammer heads
Abel Germany, walnut or hornbeam mouldings. Under felt and top felt Abel Premium. Hammer heads Abel, which are fitted in this instrument, are one of the best makes worldwide. They enable the player to get a great variety of tones.

Dampers
Renner Germany. In this grand piano dampers are used which are produced by the German company Renner. They are from solid wood and from special felt of the highest quality. These dampers are considered to be one of the best worldwide.

Action
Renner Original, Germany. Wippen rail is made from vertically oriented plywood Multiplex type. Hammer rail is made from solid beech wood. Action parts and hammer shanks are made from hard hornbeam wood. The Renner action is generally rated as one of the best. It is reliable, equally quick and it is the most frequently used action in grand pianos of world class quality.

Keys
Petrof Original. Keys are made from light solid European spruce wood. White tops are made from methacrylate Polyplex Sweden. Black keys are made from genuine ebony wood. All the keys are balanced individually. Grand piano P 237 Monsoon has keys of from European spruce. The quality has been proved by more than 140 years of production tradition. The ebony wood used for the black keys provides a very pleasant feeling whilst being played.

Key bed
Petrof original. Key bed is spruce wood sandwich, veneered by beech veneer. The inner spruce core is reinforced by inserted hard beech wooden rail in zone of legs and lyre. Total thickness of key bed is 47 mm. Key bed is additionally reinforced by solid beech wood rail from lower side. The robust key bed is another component which ensures regulated stability of grand piano’s action as well as stability of the whole instrument while being played dynamically.

Pedals
Three pedals from solid brass, polished. Left pedal (piano pedal) for shift of keyboard and action. Middle pedal for prolongement function. Right pedal (forte pedal) for lifting the dampers. Construction, materials and function of the P 237 Monsoon grand piano are comparable in quality with the highest class pianos pedal mechanisms.

Advantages of the construction and materials used in the Master Grand Piano Petrof 210 Pasat
Rim
Petrof original. Inner rim – laminated beech, birch construction, 13 lamels. Outer rim – laminated construction from birch plywood. Total thickness of the rim 8.4 cm. The great thickness of the outer rim is one of many advantages of Petrof’s grand pianos. It gives them strength, solidity and stability. Pasat’s inner wooden frame ensures high and long term tuning stability and action regulation as well as sound board crown stability, which is a presumption for perfect performance.

Frame posts
4 Spruce posts + 1 treble post made from special plastificated and compressed beech wood called Lignamon. Connection – fish-tail + beech dowels. The last treble post is made from special plastificated and compressed beech wood compounding hardness of the wooden frame in the high frequencies. This causes less damping of the treble tones. A total of 5 frame posts provide high contour stability of the frame, stability of tuning and regulation. The treble post made of Lignamon wood enriches the grand piano with the bright long high tones.

Legs
Petrof original. Solid beech core, solid alder outer lining, Gabon counter veneer, outer decorative thin veneer. The robust construction of the legs ensures a high stability of the instrument when played.

Iron plate
Czech producer. Gray cast iron, hand worked, numerically exact drilled, lacquered. The iron plate, which is of a vivid light gold tint, perfects the modern design of the instrument. It is possible to harmonize the piano design with the design of its surroundings and to produce this grand piano with silver metal parts.

Iron plate support
Steel adjustable bolt between cross block of wooden frame and iron frame. The steel adjustable bolt increases form stability of the iron plate and consequently the Pasat´s tuning stability.

Hardware fittings
Petrof original. Solid brass, polished, lacquered. P 210 Pasat´s hinges and fittings are easily compared in quality with the highest class models of our competitors. Hardware fittings are corrosion resistant, therefore they do not require any maintenance.

Pinblock
Special beech plywood type Multiplex, original veneer thickness 2 mm compressed to the density 800 – 850kg/m3 (= 6 veneer layers/cm), high moisture resistant glue. The pinblock has a high resistance against atmospheric changes (e.g. humidity). It provides equal torque of tuning pins, which results in particularly high stability of tuning.

Soundboard
Petrof original. Diaphragmatic tapered around the whole perimeter. Thickness 9.5 mm in the center, tapered to 7.5 mm along the perimeter, asymmetric crown. Made from European mountain spruce. Special long term moisture conditioning and care during the whole production process.

Ribs
Petrof original. Ends hand fitted, asymmetric shaped, made from European mountain spruce. Shaped laminated beech cross rib. A new and original asymmetric crown and asymmetric tapering of the sound board and its ribs create optimal conditions for sound board resonation. This fact contributes to generating the typical tone of this grand piano.

Bridges
Petrof original. Treble – solid beech, maple cap, genuine ebony descant cap. Bass – solid beech, maple cap, lightened by holes. Bridges graphite coated, hand notched and bored. The genuine ebony wood used in the treble bridge cup minimizes dumping of the highest tones. The ebony cup enables better transmission of the treble tones onto the sound board. Pasat´s ebony bridge cup creates significantly bright and long sound of the high tones.

Duplex Scale
Agraffes, front and rear tuned duplexes. Single hitch pinning. Duplexes enriches the tone colour of the grand piano Pasat. Single hitch pinning increases tuning stability.

Strings & Tuning pins
Steel wire Mapes USA, Röslau Germany. Copper Degen Germany. Longest string 1493 mm. Bass strings Petrof original. Steel, nickeled, stain resistance. Petrof produce strings using the highest quality string wire.

Hammer heads
Abel Germany, walnut or hornbeam mouldings. Hornbeam hammer shanks. Abel premium under felt and top felt. Hammer heads Abel, which are fitted in this instrument, are some of the best worldwide. They enable the player to get a great variety of tones.

Dampers
Petrof, hornbeam heads. Felt Laoureux France. The felt, manufactured by French company Laoureux, is a guarantee of the highest quality proved by generations.

Magnetic Accelerated Action
Magnetic Accelerated Action (MAA). Wippen rail aluminum. Hammer rail aluminum. Hornbeam action parts. The PETROF action is quick, with good repetition, it enables the grand piano Pasat to be played confidently, even technically demanding passages, and to have full control of creating tones. Specifically profiled aluminum action rails are very stable also in changing humidity.

Keys
Petrof original. European spruce, white and black acrylic tops – Polyplex Sweden. Individually balanced keys. Grand piano P 210 Pasat has keys of European origin, each key is individually balanced. The quality is proven by more than 140 years of production tradition.

Key bed
Petrof original. Spruce sandwich board, beech veneered. Solid beech insert in lyre and legs zone. Thickness 47 mm. Robust key bed is another component which ensures regulation stability of Pasat´s action as well as stability of the whole instrument while being played dynamically.

Pedals
3 pedals, solid brass. The construction, materials and function of P 210 Pasat´s pedals are comparable in quality with the highest class grand pianos´ pedal mechanisms.

Advantages of the construction and materials used in the Grand Piano PETROF 194 Storm
Rim
Petrof original. Inner rim is laminated solid beech, birch, 12 lamels. Outer rim is from alder-tree, laminated by birch plywood. Total thickness 7 cm. The rim is produced with highest exactness at “CNC machine”. The solid construction of the rim of the P 194 Storm grand piano ensures high and long term tuning stability and action regulation as well as sound board crown stability which is a prerequisite for perfect performance.

Frame posts
The rim is reinforced by 4 massive spruce posts. The connection is provided by fish-tail and beech dowels. The frame posts are produced with high exactness at “CNC machine”. The frame posts provide a high contour stability of the frame, tuning stability and regulation.

Legs
Petrof original. Solid beech core, solid alder outer lining, gabon counter veneer, outer decorative thin veneer. The robust construction of the legs ensures high stability of the instrument whilst being played.

Iron plate
Czech producer. Gray cast iron, hand worked, drilled at “CNC machine”, lacquered. Precise drilling means exact length of strings and creates good conditions for their optimal oscillation and creation of an exact tone. The iron plate, which is of a vivid light gold tint, perfects the modern design of the instrument. It is possible to harmonize the piano design with the design of its surroundings and to produce a piano with silver metal parts.

Hardware fittings
Petrof original. Solid brass, polished, lacquered. Hardware fittings are corrosion resistant, therefore they do not require any maintenance.

Pinblock
Special beech plywood type Multiplex. Original veneer thickness 2 mm compressed to the density 800 – 850kg/m3 (= 6 veneer layers/cm), high moisture resistant glue. The pinblock in this grand piano has a high resistance against atmospheric changes (e.g. humidity). It provides equal torque of tuning pins, which results in a particularly high stability of tuning.

Soundboard
Petrof original. The soundboard is made from European mountain spruce. It has a spheric crown and is shaped into wedge block. Thickness 9 mm in the center, tapered to 7 mm (in bass and front part). Traditionally shaped sound board gives high acoustic performance in all frequencies of the whole range. Its construction greatly contributes to generating the typical tone of PETROF grand pianos. The P 194 Storm grand piano is able to fill a smaller hall.

Ribs
Petrof original. The ribs are made from European spruce and are symmetrically circular shaped. The ends are fitted. The cross rib is produced from beech, is straight and is machined at “CNC machine”. Traditionally shaped, very exactly worked ribs from European spruce supports a spheric crown of the sound board.

Bridges
Petrof original. Treble – solid beech, hornbeam cap, genuine ebony descant cap. Bass – solid beech, hornbeam cap (with a foot bridge). Bridges graphite coated, hand notched and bored. The construction of the bridges and materials are comparable in quality with the highest class piano bridges. The hornbeam and genuine ebony used in the treble bridge minimize dumping of the highest tones and the highest frequencies, enable better transmission onto the sound board. The high and highest tones sound more clearly and longer.

Scale
Agraffes, front and rear tuned duplexes. Single hitch pinning. The construction of agraffes and duplexes are fully comparable to the world class grand pianos. The single hitch pinning provides better tuning stability, simpler exchange of strings. The duplexes enrich a colour of tones.

Strings & Tuning pins
Steel wire Mapes USA, Röslau Germany. Copper Degen Germany. Longest string 1410 mm. Steel, nickeled. Strings used in the P 194 Strom grand piano are made from string wire of the world’s best quality. The tuning pins are of the best quality and they are corrosion resistant.

Hammer heads
Abel Germany, walnut or hornbeam mouldings. Abel premium under felt and top felt. Hammer heads Abel, which are fitted in this grand piano, are some of the best worldwide. They enable the player to get a great variety of tones.

Dampers
Petrof, hornbeam heads. Felt Laoureux France. The felt, manufactured by French company Laoureux, is a guarantee of the highest quality proved by generations.

Action
Petrof original action. Wippen rail aluminum. Hammer rail aluminum. Hornbeam action parts. The PETROF action is quick, with good repetition, it enables the grand piano Storm to be played confidently, even technically demanding passages, and to have full control of creating tones. Specifically profiled aluminum action rails are very stable also in changing humidity.

Keys
Petrof original. European spruce, white and black acrylic tops – Polyplex Sweden. Individually balanced keys. Grand piano P 194 Storm has keys of European origin, each key is individually balanced. The quality is proven by more than 140 years of production tradition.

Key bed
Petrof original. Spruce sandwich board, beech veneered. Solid beech insert in lyre and legs zone. Thickness 47 mm. Robust key bed of the STORM grand piano is of the same construction as in master concert instruments. It ensures regulation stability of this grand piano’s action as well as stability of the whole instrument while being played dynamically.

Pedals
3 pedals, solid brass. The construction, materials and function of P 194 Storm’s pedals are comparable in quality with the highest class pianos´ pedal mechanisms.

Advantages of the construction and materials used in the PETROF IV Grand Piano

Rim
Petrof original.
Inner frame is laminated from 9 layers of solid beech and birch lamels.
Outer rim is sandwiched from solid alder core and outer plywood lamels.
Total thickness of side wall of piano is 5,8 mm.
The rim is produced with highest exactness at “CNC machine”.

The solid construction of the rim of P IV grand piano ensures high and long term tuning stability and action regulation as well as sound board crown stability which is a prerequisite for perfect performance.

Frame posts
The rim is reinforced by 3 massive spruce posts.
The connection is provided by fish-tail and beech dowels.
The frame posts are produced with high exactness at “CNC machine”.

The frame posts provide a high contour stability of the frame, tuning and regulation stability.

Legs
Petrof original.
Solid beech core, solid alder outer lining, gabon counter veneer, outer decorative thin veneer.

The robust construction of the legs ensures high stability of the instrument whilst being played.

Iron plate
Czech producer.
Gray cast iron, hand worked, drilled at “CNC machine”, lacquered.

Precise drilling means exact length of strings and creates good conditions for their optimal oscillation and creation of an exact tone.

Hardware fittings
Petrof original.
Solid brass, polished, lacquered.

Hardware fittings are corrosion resistant, therefore they do not require any maintenance. It is fully comparable to fittings used in the finest world’s grand pianos.

Pinblock
Special beech plywood type Multiplex.
Original veneer thickness 2 mm compressed to the density 800 – 850 kg/m3 (= 6 veneer layers/cm).
High moisture resistant glue.

The pinblock in this grand pianos has a high resistance against atmospheric changes (e.g. humidity). It provides equal torque of tuning pins, which results in a particularly high tuning stability.

Soundboard
Petrof original.
The soundboard is made from European spruce. It has a spheric crown and is shaped into wedge block.
Thickness 9 mm in the center, tapered to 7 mm (in bass and front part).

Traditionally shaped sound board gives high acoustic performance in all frequencies of the whole range. Its construction greatly contributes to generating the typical tone of PETROF grand pianos.

Ribs
Petrof original.
The ribs are made from European spruce and are symmetrically circular shaped. The ends are machine lightened.
The cross rib is produced from beech, is straight and is machined at “CNC machine”.

Traditionally shaped, very exactly worked ribs from European spruce supports a spheric crown of the sound board.

Bridges
Petrof original.
Treble – solid beech, hornbeam cap, genuine ebony descant cap.
Bass – solid beech, hornbeam cap (with a foot bridge).
Bridges are blackened by black PUR finish. Hand notched and bored.

The construction of the bridges and materials are comparable in quality with the highest class of standard grand piano bridges. The hornbeam cap of treble bridge supports better transmission of high frequencies onto the sound board. The foot bridge of bass bridge enables an oscillation with bigger amplitude, it improves its sound ability.
The construction and materials used in the P IV grand piano support the creation of typical tone of PETROF instruments and give sufficient acoustic performance to the grand piano.

Scale
Agraffes. Double hitch pinning in treble.

Traditional construction of agraffes is fully comparable to the finest brands of grand pianos.

Tuning pins
Steel, nickeled.

The tuning pins are of the highest quality, corrosion resistant and fully comparable to the best marks of grand pianos.

Strings
Steel wire Mapes USA, Röslau Germany.
Copper winding Degen Germany.
Longest string 1260 mm.

Strings used in the P IV grand piano are made from string wire of the world’s finest quality.

Hammer heads
Abel Germany, walnut or hornbeam mouldings.
Abel Premium under felt and top felt.

Hammer heads Abel, which are fitted in this grand piano, are some of the best worldwide. They enable the player to get a great variety of tones.

Dampers
Petrof, hornbeam heads.
Felt Laoureux France.

The felt, manufactured by French company Laoureux, is a guarantee of the highest quality proven by generations.

Action
Petrof original action.
Wippen rail aluminum.
Hammer rail aluminum.
Hornbeam action parts.

The PETROF action is quick and with good repetition. Specifically profiled aluminum action rails are very stable also in changing humidity. The action enables the P IV grand piano to be played confidently, even technically demanding passages, and to have full control of creating tones.

Keys
Petrof original.
The keys are from European spruce. White and black acrylic tops – Polyplex Sweden.
Individually balanced keys.

The P IV grand piano has keys of European origin, each keys individually balanced. The quality is proved by more than 140 years of production tradition.

Key bed
Petrof original.
Spruce sandwich board, beech veneered.
Solid beech insert in lyre and legs zone.
Thickness 47 mm.
The key bed is reinforced by beech from below.

Robust key bed of the P IV grand piano is of the same construction as in master concert instruments. It ensures regulation stability of this grand piano’s action as well as stability of the whole instrument. It provides a certitude to a playing pianist.

Pedals
3 pedals, solid brass.
Middle pedal has function of prolongement.

The construction, materials and function of P IV’s pedals are comparable in quality with the highest class pianos’ pedal mechanisms.

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