The 6176 Vintage Channel Strip combines the alluring, all-tube sounds of the legendary Bill Putnam-designed 610 microphone preamp, with the signature FET compression of our 1176LN, to create the ultimate recording channel strip. The warm, smooth tones of this mic preamp design — employed to record everyone from Frank Sinatra to Van Halen — and the unique characteristics of the compressor, are two major reasons why the 6176 is found in studios around the world. Record through the all-tube mic preamp derived from legendary Bill Putnam-designed 610 modular console Compress signals with the 1176LN Class A FET compressor section — heard on countless hit records for more than 40 years Use the "Split" or "Join" switch for separate or series operation of the preamp and compressorShape your tracks through vintage UA, "handmade in the USA," circuits Key Features: All-tube mic preamp section derived from legendary Bill Putnam-designed 610 modular consoleSignature 1176LN Class A FET compressor section — heard on countless hit records for more than 40 years"Split" or "Join" switch allows separate or series operation of the preamp and compressorHigh and Low frequency shelving EQVariable impedance Input, Gain, and Output levelsMic, balanced Line, and Hi-Z inputsUltra-quiet operationStereo interconnection via 1176-SAHand-built in USA; backed by 1-Year limited warranty Parameters Preamp:Microphone Input Impedance: Selectable, 500 Ω(ohms) or 2kBalanced Line Input Impedance: 20k ΩHi-Z Input Impedance: Selectable between 2.2 M Ω or 47 k ΩMaximum Microphone Input Level: +18 dBu (2k input impedance and 15 dB Pad in)Maximum Output Level: +20 dBmInternal Output Impedance: 80 ΩRecommended Minimum Load: 600 ΩFrequency Response: 20 Hz to 20 kHz +0, -1 dBMaximum Gain: 65 dB (500 Ω input impedance)Signal-to-Noise Ratio > 90 dB (@ maximum gain)Limiting Amplifier:Input Impedance: Selectable, 15k Ω (ohms) or 600 ΩOutput Load: Impedance 600 Ω (floating)Frequency Response: 20 Hz to 20 kHz ± 1 dBGain: 40 dB, ± 1 dBDistortion: > 0.5% T.H.D. from 50 Hz – 15 kHz with limiting, at 1.1 seconds release setting. Output of +22 dBm with no greater than 0.5% T.H.D.Signal-to-Noise Ratio: > 75 dBAttack Time: Adjustable, from 20 to 800 microsecondsRelease Time: Adjustable, from 50 milliseconds to 1.1 secondsStereo Interconnection: Optional, using 1176SA stereo interconnect accessoryGeneral:Tube Complement: (1) 12AX7A, (1) 12AT7APower Requirements: 115V/230VPower Connector: Detachable IEC power cable.Fuse: 400 mA time delay (slow blow) / 115 V200 mA time delay (slow blow) / 230 VPower Indicator Light: 28 V bulb (type 1819)Dimensions 1: 9" W x 3.5" H x 12.25" D (two rack unit)Weight: 12 lb.