IGS Audio One LA 500 – LA-2A Tube Opto Compressor (500 Series)
250V DC Tubes - Sowter/Edcor Transformers - T4B Photocell
Classic LA-2A in Modern 500 Series Format
The first high-voltage vacuum tube 500 series module from IGS Audio – 250V DC internal power conversion drives JJ ECC83 input + ECC82 output tubes for authentic Teletronix '68 LA-2A character. Double-slot mono unit with Sowter input transformer, Edcor output transformer, OEP sidechain transformer.
Legendary Optical Compression
COMP mode: 4:1 ratio, musical program compression
LIMIT mode: 100:1 brickwall limiting
Attack: 10ms fixed
Release: 0.5-5s (50% recovery @60ms)
Max GR: 32dB
Max gain: 32dB
Measurement Perfection
| Spec | Value |
|---|---|
| Max Input | +20dBu |
| Max Output | +21dBu |
| Dynamic Range | 100dB |
| Noise Floor | -99dBA |
| THD+N | 0.002% @ 0dBu |
| Freq Response | 8Hz-20kHz ±1dB |
Front Panel Precision
Illuminated GR VU meter
Peak Reduction knob
Gain/Output level
COMP/LIMIT switch
Hardwire bypass
Proven Applications
Vocals gain sheen, acoustic guitar breathes, drums punch harder, bass glues, mixbus cohesion. Replaceable T4B photocell (special order).
Made in Poland: Hand-matched 1% metal film resistors, Wima caps. Power: Slot 1: 190mA/+16V 170mA/-16V, Slot 2: 150mA/+16V.
Falkenstein EU Service: German support, fast shipping, 14-day audition.