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IGS Audio ONE LA 500-Series Tube Opto Compressor - Used  From IGS

Smooth LA-2A style compression and a plethora of vintage tube warmth built with top-of-the-line components and shrunk down to the 500 series format. 


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IGS Audio

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What We Think

The IGS One-LA fills a gap in that market we've been clamoring for since the emergence of the 500 series format. With a tube device, the problem has always been a lack of sufficient power to the plate. This lack of power results in a starved tube sound that would never work if trying to achieve the true lush and creamy LA-2A sound. By utilizing a double-wide chassis and two separate connection cards that each pull power from the two rack channels, the One-LA solves this problem and delivers the elegant and effortless performance you would expect from a 19" rack processor!

This is not an aggressive, grabby or gritty compressor. What it delivers is smooth, musical, open, and detailed compression - the type that you'd expect from a premium tube opto. I love it's simple, classic layout and never struggle to make it work for my tracks. On vocals, it is masterful! With transparent compression that always moves and flows with all the nuance of the performance, the One-LA avoids a common compression pitfall, unpleasant “gasping”. Same can be said for tracking with bass guitar through it. You get effortless leveling with some beautiful tube warmth, but without any “bloat” in the low-mids that plagues most unworthy and less well-build LA-2A clones. 

IMO there is no better compression type if you're after smooth and musical, and within the 500 series format, the One-LA is just might be the very best we've heard.


Manufacturer's Description from IGS

The IGS ONE LA is an opto-compressor built for the 500 series format. 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.

Front panel features:

  • VU Meter
  • Limiter/Compressor mode
  • Gain - Output level 
  • Peak Reduction
  • In/Bypass


IGS Audio

About Manufacturer

IGS Audio is now one the most desired studio equipment brands in Poland and it is continuously expanding internationally. The original IGS Audio products qualify as pretendants to no.1. Clones of other brands produced by Igs Audio are accurate and excellent. 

IGS Audio is all about happiness in success. IGS Audio offers 3 years warranty for all products.

IGS Studio has been operational since 1997. The IGS Audio brand was created in 2003.


  • 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

Related Videos

Introduction to IGS Audio - Quick n’ Dirty

IGS Audio is now one the most desired studio equipment brands in Poland and it is continuously expanding internationally. With gear ranging from preamps to equalizers, IGS has everything a pro or amateur engineer could ever need. All IGS products are available for SoundPure’s Try-Before-You-Buy program, so if you want to hear how this great gear sounds in your studio with your gear, shoot us an email at ProAudio@SoundPure.com, or call us anytime at 919.682.5552. Thanks for watching!