How to Adjust the Bass & Treble on a Cambridge Audio Azur 540R – This is a place for the community to provide tips and advice on How to Adjust the Bass & Treble on a Cambridge Audio Azur 540R. This topic was created by Ben Grier and the tips are provided by the community. The tips you add here can be your own or referred from another site. The best tips are then ranked at the top when up-voted by members of the community.