User Guide

RUNNING-IN

When new, PMC monitors require a short period of running-in before they

reach their full potential. This is because the mechanical and acoustical

characteristics of the bass, midrange and treble drive units alter slightly after

manufacture as the exible elements in their construction relax and reach

their optimum compliancy. The ATL

™

cabinet parameters are critically

designed to load the bass driver accurately only when it has reached its

long-term, optimal compliancy.

Consequently, during the initial running-in period of about 50 hours, the

performance of the monitor will change and improve. You will notice the

bass tonality becoming warmer, fuller, and more natural, and the bass

extension will increase signicantly. As the tweeter relaxes the treble tonality

also sweetens and integrates perfectly with the midrange unit, and the

sound staging becomes vivid.

HOURS