Specifications Utilizes premium grade input and output CineMag USA Transformers. True to the Classic '76 compressor in design and performance. Completely discrete signal path. Modeled after the D revision. Supports the famous "all buttons in" ratio setting. Ultra fast attack time. Class A line level output amplifier. Input impedance - 600 ohms, bridges-T control (floating). Frequency Response ± 1 dB 20 Hz to 20kHz. XLR and TRS inputs. XLR and TRS outputs. 50db of gain. Less than 0.4% total harmonic distortion from 50 Hz to 20 kHz with limiting. Signal to noise ratio is greater than 74 dB at 25 dBm. EIN -104.1 dbm. Attack time, 20 microseconds to 800 microseconds. Release time, 50 milliseconds to 1 second. Meter provides dB gain reduction and dB output. Internal power supply, external 24v AC power transformer. 19? Rackmount chassis, 2U. 1-year warranty.