Universal Audio Teletronix LA-2A Classic Leveling Amplifier

Universal Audio LA-2A Overview
By today’s standards, the Teletronix LA-2A Leveling Amplifier from Universal Audio appears to be a rather primitive compression device. It has only two rotary controls, one for “Gain” and one for “Peak Reduction.” However, behind this plain facade lies a unique electro-optical attenuator system that allows for instantaneous gain reduction with no increase in harmonic distortion.

A tube-based compressor, the original LA-2A featured hand-wired components and an electro-luminescent optical gain reduction device that provided the fast attack necessary for broadcast applications. Additionally, the cadmium-sulfide photo-cells provided a very natural “two-stage” release which resulted in a compression characteristic more transparent than the other compressors of its day. To this day, the LA-2A delivers a trademark sound treasured by engineers worldwide.

Painstaking care has been taken to ensure that every new Teletronix LA-2A Leveling Amplifier provides the performance and characteristics of the original. Each unit is hand built and each component carefully evaluated for authenticity.

True to the original in design, manufacturing and performance
Lag free, distortion free optical attenuator system
0 to 40 dB gain limiting
Balanced stereo interconnection

Universal Audio LA-2A Specs
Function Compressor
Number of Channels Single
Inputs 1x XLR
Jones Barrier Terminal
Outputs 1x XLR
Jones Barrier Terminal
Maximum Input Level +16 dB
Compression Threshold Dependent on “Gain Reduction” control
Compression Ratio Dependent on “Gain Reduction” control
Attack Time 10 milliseconds
Release Time Approximately 0.06 seconds for 50% release, 0.5 to 5 seconds for complete release depending upon the amount of previous reduction
Gate Threshold Not applicable
Gate Rate Not applicable
Maximum Output Level +16 dBm peaks
Make-up Gain Not specified by manufacturer
Frequency Response 30 Hz to 15 kHz, +0/-1 dB
Dynamic Range Not specified by manufacturer
Noise 75 dB below +10 dBm output level
Dimensions 19″ x 7 1/4″ x 5 1/4″ (3U)
Specialties True to the original in design, manufacturing and performance
Packaging Info
Package Weight 13.7 lb
Box Dimensions (LxWxH) 24 x 12.205 x 10.236″

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