Beethoven’s String Quartets are the undisputed sine qua non of the string quartet genre, with all other works in this form, as well as the ensembles themselves who must inevitably perform and record them, measured against this body of work and its associated recordings. The Philharmonia Quartet of Berlin, four members of the BPO, has been termed a "top-flight-ensemble" by the Chicago Tribune, possessing “a heart melting sound” (Boston Globe). An ensemble of thirty years standing, the PQB has established itself as a highly regarded, standard-setting body, and one in great demand worldwide.