The IGS Audio Rubber Bands 500 is a passive equalizer absurdly reduced in size. This tiny module is equipped with transformer balancing on inputs and outputs (Carnhill) as well as a discrete power circuit. Of course the entire filtering section is passive and mirrors fully analogue equalizers from the 60s.

Front Panel:

• Potentiometers:
  • HC (High Cut)
  • HB (High Boost)
  • Q
  • HC (High Cut)
  • HB (High Boost)
• Switches
  • HC: 6, 10, 20 kHz;
  • HB: 5, 6, 10, 12, 16 kHz;
  • BBC: 20, 40 , 60, 100, 180, 240 Hz.
• EQ IN – relay Bypass

Technical specification.

• API 500 standard module
• Passive Equalizer
• Input impendance:1kΩ – Carnhill transformer balanced
• Output impendance:600kΩ – Carnhill transformer balanced
• Max input level: +20 dBu
• Max output level: +22 dBm
• Band amplification: +18 dB
• Harmonic distortion THD: up to 0,1%
• Frequency response: +/- 0.1 dB 20Hz do 20kHz
• Signal-noise: over 99 dB
• Power supply: +/- 16V
• Current consumption: 70mA
• Dimensions: (h*w*d) 132x37x158mm
• Mass: 900g.