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Violinist Martin Kos
(1971) started playing violin under the tutelage of his parents, both teachers at the Horní Bříza Music School. Between 1985 and 1991 he continued his studies at the Pilsen Conservatoire, where he was a pupil of professor Jindřiška Holotová. He gained his Master's Degree in 1995 when he graduated from the Academy of Performing Arts in Prague in the class of professor Vladimír Rejšek.

Martin Kos repeatedly participated in European Tours of the Gustav Mahler Youth Orchestra and, in 1991, he was a concert master of the French National Student Orchestra in Bordeaux. Between 1995 and 1998 he was a member of the M. Nostitz Quartet, winners of the “B. Martinu Prize” in Reichenau (Austria), whose members studied quartet playing with the Alban Berg Quartet at the Musical Academy in Vienna. The ensemble won first prize at the International Contest of Chamber Ensembles (“Charles Hennen Concours”) in Heerlen (Holland) in 1997, second prize at the International Contest of Prague Spring in May 1998, and first prize at the International Contest of String Quartets in Cremona (Italy) in July 1998. Martin Kos has performed many classical as well as modern works with the Kos Trio Ensemble (1995-1997). Some of the contemporary compositions were composed especially for the ensemble and recorded on a CD. He supervised master violin classes at the Sychrono Conservatoire of Thessaloniki in 2000, and one year later, holiday master courses in Vertiskos (Greece). He is a soloist of the Collegium Musica Sacra Ensemble and of the Atlantis Orchestra.
He has also been a concert master of the Czech Nonet ensemble,which made a successful tour of Spain, Germany, and other countries. In February 2003, he recorded two works by Felix Mendelssohn – Bartholdy: the Violin Concerto in D Minor, and with his brother, pianist Stepan Kos, the Double Concerto for Violin and Piano in D Minor. At the International Competition of the Chamber Ensembles “Rovere d’Oro” (Italy), the two brothers won the 4th prize (July 2003). He has also been cooperating with the Czech Chamber Philharmonic Orchestra as a concert master and soloist since 2006.

Since 1999, this young artist has been a concert master and leader of the Suk Chamber Orchestra,also of the Suk Symphony orchestra Prague. Since the establishment of the Mladota Ensemble in 2003, Martin Kos has been its concert master. Beyond the Czech Republic,he has performed solo in Germany, Switzerland, Belgium, Luxembourg, Italy, Peru and Japan. He has recorded 8 CDs as a soloist or as a member of chamber ensembles.

Tomáš Vybíral
(1968) comes from a professional musical family in Prague. Initially a violin student, at the age of twelve he became interested in the double-bass. He received formal double-bass schooling with Professor Benda at the Prague Conservatory. During his final two years at the school he simultaneously served as a trainee of the Prague Symphony Orchestra, an ensemble in which he became a full member upon graduation in 1988. In 1991, Josef Suk, artistic leader of the Suk Chamber Orchestra, offered him the post of solo double-bass player in the orchestra. He was Suk´s partner in Dittersdorf´s Symphonic Concerto for Viola and Double-bass. In 1994 he was engaged as leader of the Prague Chamber Orchestra. He distinguished himself as a soloist while still a student, debuting in a concert at the Munich Hercules Hall. One of his recent top successes was a solo tour in prestigious German concert halls in Munich, Hamburg, Dortmund, Dusseldorf, etc. In fall 1998. he performed, together with famous bass-baritone Thomas Quasthoff, a very demanding piece – written almost like one for violin – of Mozart’s aria “Per Questa Bella Mano” for Baritone and Double-bass. Those concerts met with a great response not only from listeners but also from special magazines. His versatility and keen interest in chamber music have turned him into a sought-after collaborator of many different ensembles at home and abroad.

Recently, he returned to cooperation with Josef Suk. They performed and recorded Dvořák’s Quintet in G major with Double-Bass, Op. 77. In the framework of the International Music Festival Prague Spring 2000 at the Dvořák Hall of Prague´s Rudolfinum he performed, together with Josef Suk, the world premiere of the Double Concerto for Violin and Double bass by the well-known contemporary Czech composer Zdeněk Lukáš, with the Suk Chamber Orchestra. The Double Concerto is dedicated to the two solo artists.
The next chamber works like well - known Piano Quintet in A Major “Trout” by Franz Schbert and Piano Quartet in C Minor composed by once of the Germany romanticism representative Hermann Götz take a place in the programs of the concerts realized by the agency of the Suk Chamber Orchestra too. His a big success of the last time was the performance of very difficult piece “Duetto for Cello and Double Bass by G. Rossini.(Tomas Strasil – cello) in Rococo Hall of the Fronhof Castle in Augsburg (Germany).

Since 2005 is a professor of Double bass in Conservatory of Prague. Tomas Vybiral is the great double bass player and typical representative of the welt known Czech double bass shool.

Karel Untermüller
(1972) graduated from the Conservatory in Prague (professor Jaroslav Ruis) and the musical faculty of the Academy of Performing Arts in Prague (professor Lubomír Malý). He took a part in chamber music courses held by internationally known musicians - including Norbert Brainin, Sigmund Nissel, Thomas Kakuska. As a soloist he has performed with several Czech orchestras including tne Suk Chamber Orchestra, Chamber Philharmonic Orchestra Pardubice and the West-Czech Philharmonic Orchestra. He plays often with the great Czech violinist Josef Suk, including recording three CDs (together with other well known Czech instrumentalists) of chamber music by Dvořák and Suk. From the year 2003 he is the member of Mladota Ensemble Prague.
Since 2008, he teaches viola at the Conservatory in Teplice and from the year 2012 is Karel Untermüller also the professor of Academy of Music Arts Prague.

Štěpán Kos
was born in 1975 into a musical family. His parents and older brother are all professional musicians. He began his piano studies in the Special Basic School for young learners in Horni Briza, and followed them with studies at the Conservatory in Plzen under Professor Vera Müllerova, finishing in 1995. Since 1996 he has been a student of Professor Ivan Klánský. In addition to appearances in solo recitals and chamber music programs, he has appeared as soloist with such orchestras as Radio of Plzen Orchestra, Philharmony of Hradec Kralove, Western Bohemia Symphony Orchestra in Marienbad, Atlantis Orchestra, Talich Chamber Orchestra, Slovakia Philharmony, Orchestra of the Theater of J. K. Tyl in Plzen, the Moravian Philharmony Orchestra, the Bacau Philharmony, Orchestra Philharmony of Pomorsk, Orchestra Philharmony of Wroczlaw, Orchestra Philharmony of Bacau and Suk Chamber Orchestra.
He has recorded several times for the Czech, Slovak, Poland and Hungary Radio and for the Czech TV. In February, 2003, he recorded Mendelssohn's Double Concerto in D Minor for Violin and Piano with his brother, violinist Martin Kos, and the Suk Chamber Orchestra. Stepan Kos has received many awards. His most recent successes were the 1st prize, the prize of the best performance of the Concerto and Orchestra, the Filharmony Pomorsk Prize, the Radio Poland Prize of the International J. I. Paderewski piano competition in Bydgoszc (Poland 2001), the 3rd prize of the International Competiton A. M. A. Calabria (Italy 2002) and the 2nd prizes of the International Piano Competitions "Giuliano Pecar" in Gorizi (Slovenia 2002) and "Premio Rovere d´Oro" (Italy 2003).