A four-band inductor-based EQ. Created to work in common “FIVE HUNDRED” racks.A present day update of the timeless “swinging inputs” system EQ, with four easy to use bands. Each band utilizes a high quality inductor and also thoroughly chosen caps to provide two switchable frequencies. The bands are meticulously shaped and also spaced to be musical, also at full increase or cut. The highest band can be changed from alarm to shelf, to enhance regularities expanding well past 20kHz. The lowest band can also be changed from alarm to shelf, getting to down into the subsonic selection.
There are illuminated pushbuttons for added mended low (red) and top (yellow) cut filters. A relay true avoid (green) allows for effortless contrast with unprocessed source material. With the reasonable as well as high cut shifted out, and all four bands set to 0, the regularity feedback is + / – 0.25 dB from 15Hz to 25kHz, and also -3 dB at 60kHz.
With specialized input as well as outcome transformers, the Odd has plenty of headroom, also at full boost. The entire circuit is separate, with no electrolytic capacitors in the signal course, and also no servo amps. With just two energetic phases, the current draw is low sufficient to work in any type of shelf, as well as leave lots of liquid for other modules. The Odd uses one KDJ3 opamp and also one KDJ4 opamp.