
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.


- UK over £99 FREE
- Same Day (M25) £48 stock dependent
- UK under £99 £10
- EU £36
- Rest of World £80
Large/Heavy items: Extra charges may apply (e.g., consoles, large monitors). We’ll contact you before processing if so.
We ship with DPD and UPS across the UK, EU and worldwide. Same-day within the M25 is available depending on stock.
At KMR, we provide exceptional support for all your audio studio requirements. Our committed team is ready to help you with setup, troubleshooting, and optimizing your gear for peak performance.
If you face any challenges, our customer service team is just a phone call away, prepared to offer expert assistance.