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IGS Audio One LA 500

500 Series Mono Optical Valve Compressor

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  • One LA 500 (Front)
  • One LA 500 (Angle)
  • IGS One LA 500 (Side)
  • IGS One LA 500 (Rear)
RRP: £809.00 (You save £30.00)
£779.00 (inc VAT) £674.17 £649.17 (exc VAT)
In Stock
Next Working Day Delivery (UK Only)
3 Years
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Finance available on orders over £500

Related & Alternate Products

The classic Optical/Valve "LA-2A" Sound - now in 500 series.

The One LA 500 from IGS Audio brings the highly sought-after "LA-2A" sound into the modern 500 series format, with no compromises.

The ONE-LA features an on-board 250V voltage converter to provide adequate power for the valves. The One LA is designed to work with any standard 500 series rack / power supply.

The One LA500 is hand made with high quality, matched components. The input section features a JJ 12AX7 Input tube and Sowter transformer, and the output section has a JJ 12AU7 output tube and Edcor transformer. Each One LA 500 is individually calibrated and based on the circuit and sound of the classic Teletronix 1968 LA-2A.


The One LA 500 is perfect for adding rich harmonics to vocals, strings, bass and adding beef to drums. Any source that would benefit from valve warmth and slow, larger-than-life sounding compression.

Team the One LA-500 up with a classic FET-style compressor like the IGS Alter 500 or the new IGS 576 Blue Stripe, for the classic combo of fast and slow compression, giving your vocals and other sources great tone and even dynamics.


The One LA 500 is incredibly simple to use, it has just two knobs. GAIN (Output Make-up Gain) and Peak (Gain Reduction). There is also a switch to change the ratio from normal compressor to more aggressive limiting. There is also a Bypass switch for comparison between the original dry and compressed signals.


  • +4dB operating level
  • The original Teletronix 68 audio path
  • Tubes powered by 250V DC
  • JJ 12AX7 input and JJ 12AU7 output tubes
  • Sowter input transformer
  • Edcor output transformer
  • OEP sidechain transformer
  • T4B replaceable photocell
  • 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
  • Potentiometers manipulators
  • Hard wire bypass
  • Compressor/Limiter mode
  • Large VU meter
  • 3 years warranty
  • Shipping weight: 3kg.

SKU: onela500

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