CD's you bring for auditioning

Do you also have some CD's which you use to audition equipment and which will reveal immediately shortcomings, eg I use

Buddy Guy - Sweet Tea (first couple of tracks can be unbelievable hard to listen to on some equipment

Pink Floyd - DSOTM, checkout the bass, the clocks can sound 'washed' up on some over-tubed systems

Pink Floyd - The Wall , played at loud volume will immediately reveal shortcomings on loudspeakers

and yours...