IGS / Products / Equalizers / Tilt n Bands

Tilt n Bands

Once when I was a little boy, I heard my uncle’s equalizer which he built into his stereo. The sound was incredible. I still remember it to this day. Three potentiometers gave it a sound that I’d never heard before. I couldn’t stop listening to the sound that his compact player made.

Full tube mastering equalizer

My uncle Chris

I asked my uncle for the diagram and he drew it with a pencil on a piece of paper. I quickly learned the schematic by heart and as an electronic engineer amateur, I have repeatedly built the hi-fi amplifiers using the schematic. The EQ sounded implausible each time.

After many years

After many years I decided to make a studio device based on my uncle’s schematic. I improved the arrangement by adding a transformer balanced tube stage. The Tilt turned out to be a cool addition too. This vintage circuit is very useful in any mastering application. I hope, you will feel the vibe of my uncle’s old radio equalizer.

I hope, you will feel the vibe of my uncle's old radio equalizer

  • Basic features
    • Hard wire bypassyes
    • Q factor0.5 to 5
  • Input & Output
    • Audio transformersIGS Custom on input and output
    • Input Impedance (balanced)10k Ohm
    • Output Impedance (balanced)600 Ohm
  • Levels
    • Operating Level+4 dBu nominal
    • Max output level+19 dBu
    • Noise Level-79 dB
  • Bandwidth
    • Frequency response20 Hz to 40 kHz, +/-0.3dB
  • Distortion (@ 20 Hz - 20 kHz)
    • THD+N0.2% (1kHz @ +19 dBu)
    • Crosstalk>70dB
  • Power
    • Voltage230/115
    • Power consumption64W
    • Power supplyLinear, internal
  • Packing box
    • Shipping weight11kg
  • Front Panel
    • VU MetersMagic eye
  • Others
    • Tube set6x6N1P, 2x6E2
    • Used forMastering, tracking