ATTACH1304.vBATTACH Twenty-two years of progressive research into loudness perception resulted in a limitercompressor unlike any other. The 8900 Dynamic Range Controller was intrinsically developed to react to loudness (rather than volts) like our ears do. The 8900's psycho-acoustic approach uses multiple true-RMS detectors, remarkably accurate log converters, and fast peak detectors to respond intelligently to real signal energy, not just level. This unusual design employs unique controls, like Crest Factor, Timing, and Release Hysteresis to access the parameters that you really want to adjust. Familiar features such as Stereo Link, SoftHard Knee, Ratio, Output Level, as well as the comprehensive 40- segment tricolor GainLoss metering have been carefully optimized for flexible, creative control over a wide dynamic range with a lack of audible artifacts. Very useful is the Side Chain Input that permits external frequency shaping to be introduced into the detection circuitry. The entire audio path is all-discrete, including the VCA, for unsurpassed transparency and low-level resolution. The 8900 packs all of this in a formidable 2U, two-channel unit which requires requires the external GML 9015 Power Supply.