Upon its release in 1967, the 1176 Limiting Amplifier became an instant classic because of its unique lightning-fast attack and release times, musical Class A output stage, and its wide range of sounds, ranging from subtle, near-transparent compression, to all-out drive and distortion.Universal Audio’s 1176LN Classic Limiting Amplifier is a handbuilt, faithful reproduction of Bill Putnam Sr.’s original visionary design — an iconic piece of audio history that had a hand behind classic recordings from Led Zeppelin, The Rolling Stones, Michael Jackson, and more.Features: True to the original in design, manufacturing and performance Modelled after 1176LN, blackface, D and E revisions Ultra fast attack time -20 microseconds to 800 microseconds Class A line-level output amplifier Custom built Putnam-designed output transformer Stereo interconnect operation Specifications: Input Impedance: 600 ohms, bridges-T control (floating) Output Load Impedance: 600 ohms, floating, damping factor 20 External Connections: Jones Barrier terminals and XLR connectors Frequency Response: ± 1 dB 20 Hz to 20kHz Gain: 50 dB Distortion: Less than 0.5% total harmonic distortion from 50 Hz to 15 kHz with limiting Signal to Noise Ratio: Greater than 70 dB at +10 dBm Attack Time: 20 microseconds to 800 microseconds Release Time: 50 milliseconds to 1.1 seconds Meter: via 1176 SA Network accessory Meter: dB gain reduction and dB output Power Requirements: 120/240 V Maximum Operating Temperature: 160°F Dimensions: 19" Rackmount chassis, 3U Weight: 5 kg / 13 lbs.