The V4 String Quartet, founded in 2021, is a unique ensemble representing an exquisite collaboration among accomplished musicians from the Visegrád Group. Composed of exceptional artists from Hungary, Poland, Slovakia, and the Czech Republic, the quartet passionately brings to life the diverse musical heritage of the region. Their authentic performances span from the rich traditions of the past to the vibrant compositions of today, captivating audiences at prestigious European festivals.

Dedicated to promoting cultural exchange, the quartet played a pivotal role in spotlighting V4 musicians and composers to European audiences since the V4 Anniversary Year in 2021. By seamlessly blending their respective countries' musical traditions, the V4 String Quartet pioneers innovative ways to visualize music for greater diversity and compassion in society.

Along with their performance endeavors, the quartet is committed to education. They conduct master classes and workshops across the four countries, nurturing the next generation of talent and fostering deeper cultural connections within the V4 region.

As a symbol of European unity and cooperation, the V4 String Quartet proudly represents the harmonious synergy among different EU nations. They have graced renowned festivals, including the Levoca - Indian Summer Festival and the Domus Artis Festival in Slovakia, the New Millennium International Chamber Music Festival in Hungary, the EUFONIE International Music Festival, and the Chain Festival of the Lutosławski Society and the Rzeszów Musical Autumn in Poland, among others, performing in renowned concert halls such as the Festetics Palace in Budapest and the Primacial Palace in Bratislava.

The members of the V4 String Quartet:

Miranda Liu (USA/Hungary) - Violin

Daniel Rumler (Slovakia) - Violin

Tomáš Krejbich (Czech Republic) - Viola

Bartosz Koziak (Poland) - Cello

She has performed at Carnegie Hall, Verizon Hall, Veterans Memorial Auditorium, New World Center, Barbican Centre, Wigmore Hall, Croatian Music Institute, Lithuanian National Philharmonic Hall, Radio Society Concert Hall Bucharest, Liszt Ferenc Academy Budapest, Palacio de Festivales de Cantabria, Wiener Konzerthaus, Mozarteum Salzburg, among others.

Since her first solo appearance with orchestra at age eight, she has gone on to solo with many orchestras, including: the Concerto Budapest Symphony Orchestra, the Krakow Philharmonic Orchestra, the New World Symphony, the Las Vegas Philharmonic, the Rhode Island Philharmonic Orchestra, the Lithuanian National Philharmonic, the Norddeutsche Philharmonie Rostock, the  Rousse Philharmonic Orchestra, the Philharmonie Salzburg and the Romanian Radio Symphony Orchestra. Her concerto repertoire alone encompasses over 70 works for violin and orchestra.

A native of California, Miranda Liu received her musical training at the Mozarteum Salzburg (the youngest violin student ever to be admitted into the Bachelor of Arts Degree Program at age 14) and at the Liszt Academy of Music (the youngest doctoral candidate to be admitted at age 20). In 2016, András Keller appointed her concertmaster of the Concerto Budapest Symphony Orchestra, one of Hungary's oldest and leading symphony orchestras. As the result of her love and passion for chamber music, Ms. Liu is a founder and first violinist of both the renowned Central European String Quartet (CESQ) and the V4 String Quartet, as well as the founder and artistic director of the New Millennium International Chamber Music Festival and Academy (NMICMF).

Daniel Rumler studied at the Pardubice Conservatory with Jiří Kuchválek, at the Academy of Performing Arts in Prague with Prof. Jiří Tomášek, and at the Lucerne University of Applied Sciences and Arts with Prof. Igor Karško and Prof. Guiliano Carmignola. He also obtained a Master’s Degree in Pedagogy at the same institution.

Between 2015 and 2017, he performed regularly with the Musikkollegium Winterthur and the Sinfonieorchester Biel-Solothurn. He appears regularly with Camerata Zürich, as well as the baroque orchestra Ensemble Corund Luzern. In Slovakia, he has collaborated with outstanding artists, such as A. Hučková, J. Krigovský, J. Lupták, M. Paľa a M. Ruman. As a chamber musician, he has performed at festivals such as: Convergences Bratislava, Confrontations Nitra, Murten Classics, and Lucerne Festival. He lectured the Slovak Youth Orchestra and joined the violin faculty of the Conservatory in Bratislava in 2021.

Furthermore, Mr. Rumler has a wealth of experience in arranging and composing his own music. Some of his transcriptions have been recorded for ECM Records and the Swiss radio SRF.

As a former violinist, his viola studies began in 2011.  He received his training at the Academy of Performing Arts in Prague in the class of Prof. Jan Pěruška and at the Royal Danish Academy in Copenhagen under supervision of Tim Frederiksen and Lars Anders Tomter. During his academic years, he took part in many festivals and masterclasses, such as Kyoto International Music Students Festival, International Music Forum Trenta, Karen Tuttle Coordination Conference and many more, under the tutelage of Elmar Landerer (Wiener Philharmoniker), Roger Benedict (Sydney Symphony Orchestra) or Pieter Schoeman (London Philharmonic Orchestra).

In 2016, he was a soloist in the Brahms- Saal at the Wiener Musikverein and later in 2017, he performed Tchaikovsky’s Souvenir de Florence with Boris Kuschnir, Nikolaj Znaider and Misha Quint at the Sulzbach-Rosenberg InterHarmony International Music Festival. He performed with various orchestras and ensembles such as: the European Union Youth Orchestra, PKF - Prague Philharmonia, Barocco Sempre Giovane and Prague Chamber Orchestra, alongside conductors like Jiří Bělohlávek, Jakub Hrůša, Gianandrea Noseda and soloists like Alisa Weilerstein, Giuliano Carmignola, Pinchas Zuckerman, Jana Boušková, Anna Netrebko or Diana Damrau.  His orchestral and chamber music experiences brought him into some internationally acclaimed concert venues such as Konzerthaus Berlin, Concertgebouw Amsterdam, Usher Hall Edinburgh or Royal Opera House Muscat. He is currently a violist of the Prague Symphony Orchestra, a member of Sedláček Quartet and since 2015, a music school teacher.

Bartosz Koziak is the winner of the 3rd Witold Lutoslawski International Cello Competition in 2001 in Warsaw, Poland, a winner of the 2nd prize at the International Cello Competition in Tongyeong (Korea) in 2006 (“Isang Yun in memoriam”), winner of the 2nd prize at the Mikola Lysenko Competition in Kiev in 2007 as well as winner of the International Contemporary Chamber Music Competition in Kraków, a laureate and a winner of a special prize at the Prague Spring Music Festival in 2006.

Bartosz Koziak also received prizes at the International Tchaikovsky Competition in Moscow in 2002 and the ARD competition in Münich in 2005. In 2003, he received a special prize of the Polish Cultural Foundation awarded by Ewa Podleś.

Bartosz Koziak is a holder of a scholarship granted by the French government and a participant in the programme of the Polish Ministry of Culture “Młoda Polska”.

He performed at Konzerthaus in Berlin, Rudolfinum in Prague, Cité de la Musique in Paris, Teatro Politeama in Palermo, Studio of Witold Lutoslawski and the Warsaw Philharmonic Hall.  As a soloist, Bartosz Koziak collaborated with the Polish National Philharmonic Orchestra, the Polish Radio Symphony Orchestra Katowice, Sinfonia Varsovia, Sinfonietta Cracovia, Orchestre Philharmonique de Monte Carlo, Concerto Budapest (under Andras Keller), Armenian State Orchestra (under Sergey Smbatayan), Prague Philharmonic Orchestra, radio orchestras in Warsaw and Budapest, as well as a majority of philharmonic halls in Poland conducted by Krzysztof Penderecki, Jan Krenz, Antoni Wit, Gabriel Chmura, Jacek Kaspszyk, Tan Dun and Massimiliano Caldi.