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The use of duplexes in the new generation of PETROF grand pianos

The speaking length of the piano string is from the capo V bar or from the agraffe to a bridge pin. The string vibrates in this section in its fundamental frequency, which determines the tone or pitch. Along with the fundamental frequency, the string always emits additional higher harmonic partial tones, which influence the tone colour or complexity.

The tone or note, which sounds only in its fundamental frequency, is quite simple, clean, but feels colourless, inexpressive, lifeless and uninteresting. The tones produced by musical instruments comprised from basic tone and higher complex harmonic tones, which together with the fundamental tone, makes it rich, and more importantly, makes each note sing!

Duplexes for the longer, richer and complex sound of the Petrof grand piano

In the range of the high middle and treble section, PETROF lets the string speaking length sound together with its front duplex in front of the capo bar and its rear duplex behind the bridge. We set these sections using metal frets (duplex frets, bridges); these string sections vibrate in harmonic frequencies, which enrich the fundamental tones.

This principle is used in all the new generation of PETROF grand pianos (see the photos below). This results in longer, richer and more complex tones in the higher frequencies or notes.

Generally the use of duplex scaling in pianos is demanded by the most discriminating pianists and it is one of the features of advanced piano design employed by PETROF in our new grand piano line.
P 159 BORA
P 173 BREEZE
P 194 STORM
P 210 PASAT
P 237 MONSOON
P 284 MISTRAL
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公司总裁寄语

Zuzana Ceralova Petrofova能够传承祖辈一百五十年前所开创的钢琴传统制造工业,对我而言是一种莫大的荣幸。佩卓夫专注于立式钢琴和三角钢琴的制造,并且一直致力于优良的制造工艺。能够为广大钢琴弹琴者带来快乐,并且能够用佩卓夫那被时光雕琢的柔美音色感动全世界热爱音乐的人的心,是我们一直所追求的目标。
 
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Mgr. Zuzana Ceralova Petrofova
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