Coldplay on Quad 988

I am a few months into a pair of Quad 988. When the music is right they sound excellent. Vocal best I have heard. I have recently acquired the last three Coldplay CDs and all of them sound bad except when there is only vocal on the recording. Again with vocal they are excellent.
The music part of Coldplay is heavy distorted and in my mind very unattractive. What is going on?