Auryn Quartet
Artist's website: http://www.aurynquartet.com/
The Auryn Quartet was a German string quartet. Founded in 1981, the members were Andreas Arndt (cello), Stewart Eaton (viola), Matthias Lingenfelder and Jens Oppermann (*1960), both violin.
After winning several early awards - including the London International Competition (1982), the ARD International Music Competition (1982), and the main prize at the European Broadcasting Competition in Bratislava (1989) - they had the opportunity to treat the classic repertoire in particular depth thanks to the ongoing interactions between the original personnel.
Read more at https://en.wikipedia.org/wiki/Auryn_Quartet