Only now have I learnt how to write quartets properly." So wrote Beethoven in 1801, having just finished his first set of string quartets at the surprisingly advanced age of 30. The competition of Haydn and Mozart must have been intimidating for the young composer. Performed here by the Jerusalem Quartet, these six String Quartets Op.18 already display much boldness and originality, from the dramatic echoes of Romeo & Juliet in No.1, to the astonishing programmatic finale of No.6, "La Malinconia.