TWENTY YEARS A REFERENCE MONITOR. WHY? 1. INTRODUCTION: Historically, one of the most hotly contested topics of discussion in the recording industry has been that of studio monitoring. The 75 years since the invention of the moving coil loudspeaker have not culminated in anything approaching a consensus of a universal monitor. It would appear that a general trend has been to use large, full-range monitors, with frequent reference to the smaller mixing monitors, during .