![A Dorrough Loudness Monitor is roughly analogous to a "PPM" and a "VU" combined, but with more complimentary ballistics assigned to each parameter. The result is an established relationship between the PEAK and the RMS content. When riding gain for ... A Dorrough Loudness Monitor is roughly analogous to a "PPM" and a "VU" combined, but with more complimentary ballistics assigned to each parameter. The result is an established relationship between the PEAK and the RMS content. When riding gain for ...](https://www.dorrough.com/images/about%20us/meters1.gif)
A Dorrough Loudness Monitor is roughly analogous to a "PPM" and a "VU" combined, but with more complimentary ballistics assigned to each parameter. The result is an established relationship between the PEAK and the RMS content. When riding gain for ...
![Dorrough Loudness Meter Repair / Change out Incandescent wheat lamps to LED Modification Model 40-A2 - YouTube Dorrough Loudness Meter Repair / Change out Incandescent wheat lamps to LED Modification Model 40-A2 - YouTube](https://i.ytimg.com/vi/H-p7xoc7ayo/maxresdefault.jpg)