Universal Audio
LA-2A Gray
Smooth vocal and instrument dynamics with the mid-1960s Gray LA-2A's medium-speed optical response. Tube-path coloration and frequency-sensitive detection complement its straightforward leveling controls.
GUI Screenshot
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The Overview
The Gray model represents Jim Lawrence's mid-1960s LA-2A, occupying the middle of the collection's response speeds. It is slower than the Silver and quicker than the early LA-2, with its own modeled knee, headroom, distortion, and program-dependent behavior.
Its optical gain element does not use a conventional pair of attack and release knobs. Instead, the signal history and frequency content govern the multistage response. This makes it useful for sustained vocal, bass, string, or horn parts where continuous leveling can sound more appropriate than sharply timed peak reduction.
Begin by setting Peak Reduction for the desired movement, then use Gain to restore loudness. Compare Compress and Limit for different strength rather than treating either as a mathematically fixed ratio under every condition. Emphasis adjusts which frequencies most strongly drive the detector without acting as ordinary audio EQ. With Peak Reduction at minimum, the modern model can still supply output-path coloration; Power is the true bypass. The linked manual assigns the added Mix control to LA-2, not this Gray version.
Manual — sections: Teletronix LA-2A Gray; Operational Overview; LA-2A Controls.
The Controls
- Peak Reduction: Clockwise lowers the threshold and increases reduction. Its available threshold range is 0 to −40 dB; the panel's 0–100 markings are not literal decibels. At minimum, gain reduction ceases but the modeled audio path still affects tone.
- Gain: Adds up to 40 dB after compression. Set it after Peak Reduction so a louder output does not obscure the envelope change. It does not change compression amount, and its panel numbers are arbitrary rather than calibrated dB values.
- Compress/Limit: Compress is approximately 3:1; Limit is approximately infinity:1. These are descriptive values, not guarantees, because the optical response is nonlinear and frequency dependent. Start in Compress for gentler leveling and compare Limit when stronger restraint is needed.
- Emphasis / +HF−: Fully clockwise gives the default unfiltered detector. Counterclockwise reduces lower-frequency content in the sidechain, making high-frequency material relatively more influential. Use it when bass energy drives unwanted reduction; it does not directly boost treble in the output.
- Meter Knob / VU: Select Gain Reduction to view attenuation, or +4/+10 to view output. At +4, zero on the meter represents +4 dB output. Change meter mode after setting reduction to check compensation.
- On/Power: Disables the complete processor for matched-level comparison. DSP reduction depends on LoadLock. This Gray model has no user attack/release controls, and the linked manual does not assign it the LA-2's added Mix control.
Manual — sections: Peak Reduction; Gain; Meter Knob; On/Power Switch; Compress/Limit; Emphasis (HF).