The Dorrough 20-C Analog Loudness Meter is a single-channel version of Dorrough's standard 40 series loudness meter with a straight-line scale designed for applications with limited vertical space and display calibrated to +20dB.
This meter provides access phase correlation, peak hold, sum/diff, and reference mode allowing 0 reference setting to .1dB accuracy, directly or with the optional remote control. It has Phoenix (euroblock) connectors. Rack mounting is required.
Straight Line Display
The 20 Series is functionally identical to the 40 series, except that the 20s have a straight-line scale designed for applications with limited vertical space. These easy-to-read meters are made to install easily in a custom console or with optional rack mounts.
Peak and Average Percent Metering
The 20-C, like all Dorrough loudness meters, simultaneously displays peak and average, in this model with a straight-line scale designed for applications with limited vertical space and calibrated to +20dB. The relative difference, in dB, between Peak and Average ballistics is derived from the integration time of the persistence scale.
Right and Left Inputs for Stereo Mixing
With one instrument, the operator can easily see the stereo mix and avoid classic in-phase/out-of-phase problems as well as center channel buildup that can cause a mix to seem louder. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility.