IGS Audio: ONE LA 500

The IGS ONE LA is an opto-compressor built for the 500 series format. This is the first high voltage vacuum tube 500 series module that is offered by IGS. It is powered with 250V DC from an on-board voltage converter, so it can be plugged into any 500 series rack equipped with a standard power supply.


Every single ONE LA is hand made with high quality, matched components (1% metal film resistors, Wima caps). It is equipped with RFT NOS tubes and individually calibrated to give you the unique and unspoiled experience of one of the best opto-compressors in the history - the Teletronix '68 LA-2A. We have spent hundreds of hours designing the ONE LA, to make sure that it is as simple to use as it is versatile. Not only for harmonically rich vocals and strings, but also for huge and beefy drums and bass instruments. Three audio transformers (Sowter and Edcor in audio path and OEP in sidechain) have been used to provide excellent performance and with only two knobs and a single compressor/limiter switch, there is nothing that could go wrong.



500-series double module, mono unit
+4dB operating level
Original Teletronix '68 audio path
tubes powered by 250V DC
JJ 12AX7 input and RFT NOS 12AU7 output tubes
Sowter input transformer
Edcor output transformer
OEP sidechain transformer
T4B replaceable photocell (for special order)
Power consumption: max 180mA per slot
Input impedance: 10k Ohm
Maximum output: +21dBU
Amplification: 36dB
Gain reduction: 36dB
Frequency response: 20Hz - 20kHz, +/-0.1 dB
Potentiometer manipulators
Hard wire bypass
Compressor/Limiter mode
Large VU meter
3 year warranty
Shipping weight: 3kg

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