The Purple Audio Odd Equalizer is a modern update of the classic "swinging inputs" console EQ, with four
easy to use bands. Each band uses a high quality inductor and
carefully selected caps to give two switchable frequencies. The bands
are carefully shaped and spaced to be musical, even at full 12dB boost
or cut. The highest band can also be switched from bell to shelf, to
boost frequencies extending well beyond 20kHz.
There are illuminated pushbuttons for additional fixed low (red) and
high (yellow) cut filters. A relay true bypass (green) allows for
easy comparison with unprocessed source material.
With the low and high cut switched out, and all four bands set to 0,
the frequency response is +/- 0.25dB from 15Hz to 25kHz, and -3dB at
60kHz. Has the same input and output transformer as the Biz
With specialized input and output transformers, the Odd has plenty of
headroom, even at full boost. The entire circuit is discrete, with no
electrolytic capacitors in the signal path, and no servo amps. With
only two active stages, the current draw is low enough to work in any
rack, and leave plenty of juice for other modules.
