In 1973, ADR came out with a stand-alone three-rackspace, 2-channel rackmount version that was subsequently repackaged into a two-rackspace unit and badged as the Compex Limiter F760X-RS.Renowned for decades by top engineers as the quintessential box for larger-than-life drum sounds!
The ADR Compex F760X-RS may be the best compressor/limiter available for drum room mics and drum bus duties and is also highly sought-after for the character and punch it adds to guitars along with a myriad of other sources. The Compex limiter provided peak limiting with a multi-ratio, variable threshold compressor. Ratio settings ranged from 1:1 to 20:1 and there were controls for threshold and release time. The inclusion of an expander/gate provided attenuation of the gain during pauses in the audio signal to reduce noise caused by compression; the expander/gate could also be used for special 'punchy' effects, favoured on drum and percussive sounds. Noise gates were often criticised at the time for 'hunting' around the threshold point.
