IGS Audio Photon 500

Optical Compressor in 500 series format

Our price:$1,335.00 GST
Order Code: PHOTON500

Contact us for expected arrival, queue backorder

IGS Audio PHOTON 500 is an optical compressor, based on technology from the 60’s, first used in the early LA-2A limiters and later in the LA4.

PHOTON 500 uses an opto-coupler, which introduces negative feedback in the audio path, taking care of gain reduction, being the basics of all compression.

It has an electronically balanced input with a 2520 compatible op-amp in the gain stage.

The output is balanced by an IGS Custom made transformer.

Photon 500 features:

  • Good for compressing instruments (guitar, bass, mono synth)
  • Great vocal compressor
  • Work well with single drum tracks and samples
  • Great all-around compressor

GR BAR: Very fast LED indicator showing the compression level in the range from 0 to 20dB.
PEAK: Controls the gain of the side-chain circuit
OUTPUT: 12-pole stepped makeup gain
RATIO: Allows to adjust the compressor ratio. 2:1, 4:1 or 12:1
HPF (Hi-Pass filter): Flat, 60, 120Hz
MODE: Advanced compression curve modeling, like SLAM.
BYPASS: Hard wired bypass

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For more hand-made IGS Audio recording channels and signal processing, check our IGS Audio brand page here

Device type
Optical Compressor Yes
Basic features
All stepped manipulators Yes
Sidechain HPF OFF, 60Hz, 120Hz
Input & Output
Input Impedance (balanced) 10k ohm
Output Impedance (balanced) 600 ohm, Custom transformer
Audio transformers Yes, IGS Custom
Operating Level +4 dBu
Max input level +20 dBu
Max output level +22 dBu
Noise Level -99 dBA
Max. gain 30 dB
Max Gain Reduction 20 dB
Time constants
Ratio 2:1, 4:1, 12:1
Frequency response 8 Hz to 20 kHz, +/- 0.1dB
Distortion (@ 20 Hz – 20 kHz)
THD+N 0.01%
Power consumption 2.5W

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