IGS Audio with a new take on mastering level stereo equalization!
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 payer 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.
Specifications
- 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
