Universal Audio 1176LN Classic Limiting Amplifier

Legendary FET compression with tone and attitude - true to the original.

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.

• Track and mix with the legendary FET-Style Compressor with custom-made class A output transformers
• Record your tracks through vintage UA, "handmade in the USA," circuits
• Harness ultra-fast attack time on bass, guitars, vocals and more
• Add color, character, and vibe to signals without using compression

A Toneful, Colorful Compressor
Billed as a “true peak limiter with all transistor circuitry and superior performance on all types of program material," the 1176’s major selling point was its ultra-fast attack time - a mere 20 µS (.00002 seconds) at its fastest setting. But engineers soon found out that the 1176 also injected character, attitude, and vibe to anything run through its circuitry. Some even used the 1176 with the compression turned off, just for the distinctive tone it imparts. The unit’s amplifiers and transformers all by themselves give a desirable “hot" quality to anything passing through them.

Rebirth of a Legend
In 1999, when Bill Putnam, Jr. relaunched Universal Audio, a reproduction of the Blackface 1176LN was the company’s first product. Reissued in 2000, it was based on the circuit designs of the C, D, and E revs of the classic 1176. One of the most critical aspects of recreating the sound of the original hardware, was faithfully reproducing the original output transformer, complete with the additional windings that provided the feedback signal to the final line output amplifier circuit. Bill Putnam Jr. found extensive design notes that enabled him to recreate and improve his father’s original design.

Push-Button Magic
One of the 1176’s famous features are its push-button selectable ratios of 4:1 and 8:1 for compression, and 12:1 and 20:1 for limiting. 1176 at 4:1, to its most notable setting, the “All Buttons In" mode, where all the ratio buttons are depressed simultaneously. This allows the 1176 to make a sound unlike any other processor ever heard before. Distortion increases, along with a plateaued slope and a lag time in response to initial transients, creating an explosive sound on drum room mics, fuzzing-out bass or electric guitar sound, or squeezing a vocal to bring it front and center of your mix.

Accept No Substitutes
Carefully trained Universal Audio staff hand build and test each unit at the UA Custom Shop in Santa Cruz, California until it meets our uncompromising standards. This Universal Audio Classic version of the 1176LN captures all the nuance of the original through obsessive attention to detail and delivers that trademark sound. Demand the original.

Features

• True to the original in design, manufacturing and performance
• Modeled 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
• Hand-built in USA; backed by 1-year limited warranty

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
• Stereo Interconnection: via 1176 SA Network accessory
• Meter: dB gain reduction and dB output
• Power Requirements: 120/240 V
• Environmental: Maximum operating temperature 160°F
• Dimensions: 19" Rackmount chassis, 2U
• Weight (unboxed): 11 lbs.

What's Included

• 1176LN Classic Limiting Amplifier

Warranty Period

1 Year

Authorized Reseller