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
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 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 | |
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Hard wire bypass | yes |
Q factor | 0.5 to 5 |
Input & Output | |
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Input Impedance (balanced) | 10k Ohm |
Output Impedance (balanced) | 600 Ohm |
Audio transformers | IGS Custom on input and output |
Levels | |
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Operating Level | +4 dBu nominal |
Max output level | +19 dBu |
Noise Level | -79 dB |
Bandwidth | |
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Frequency response | 20 Hz to 40 kHz, +/-0.3dB |
Distortion (@ 20 Hz - 20 kHz) | |
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THD+N | 0.2% (1kHz @ +19 dBu) |
Crosstalk | >70dB |
Front Panel | |
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VU Meters | Magic eye |
Power | |
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Voltage | 230/115 |
Power consumption | 64W |
Power supply | Linear, internal |
Packing box | |
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Shipping weight | 11kg |
Others | |
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Used for | Mastering, tracking |
Tube set | 6x6N1P, 2x6E2 |
Files |
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TnB_Hi_Boost_Cut.JPG |
TnB_Mid_Boost_Cut.JPG |
TnB_Bass_Boost_Cut.JPG |
TnB_Tilt.jpg |
© 2015 IGS Audio