IGS Audio Tilt n Bands

Full tube mastering equalizer

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.

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 scheme by heart and as an electronic engineer amateur, I repeatedly build the hi-fi amplifiers using the scheme. The EQ sounded implausible each time.

After many years After many years I decided to make a studio device based on my uncle's scheme. 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.

improved the arrangement After many years I decided to make a studio device based on my uncle's scheme. 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.

• Q factor 0.5 to 5

• Hard wire bypass yes

• Input Impedance (balanced) 10k Ohm

• Output Impedance (balanced) 600 Ohm

• Operating Level +4 dBu nominal

• Max output level @ 1.6% THD +37 dBv; +26dBv @ 20 Hz

• Noise Level -120dB

• Frequency response 20 Hz to 40 kHz, +/-0.3dB

• THD+N 0.08% (1KHz @ +4 dBu)

• Crosstalk >120dB

• Voltage 230/115

• Power consumption 64W

• Power supply Linear, internal

BASIC FEATURES:

Q factor: 0.5 to 5

Hard wire bypass: yes

INPUT & OUTPUT:

Input Impedance (balanced): 10k Ohm

Output Impedance (balanced): 600 Ohm

LEVELS:

Operating Level: +4 dBu nominal

Max output level: @ 1.6% THD +37 dBv; +26dBv @ 20 Hz

Noise Level: -120dB

BANDWIDTH:

Frequency response: 20 Hz to 40 kHz, +/-0.3dB

DISTORTION (@ 20 HZ - 20 KHZ):

THD+N: 0.08% (1KHz @ +4 dBu)

Crosstalk: >120dB

FRONT PANEL:

VU Meters: Magic eye

POWER:

Voltage: 230/115

Power consumption: 64W

Power supply: Linear, internal

PACKING BOX:

Shipping weight: 11kg

OTHERS:

Used for: Mastering, tracking

Tube set: 6x6N1P, 2x6E2