SPACEMAN: Equinox Equaliser

SPACEMAN Equinox vero layout v1c 7aff44874f02

The Equinox is Spaceman’s trimmed-down version of an old-school studio equaliser – it’s definitely inspired by Pultec, but with a few key differences.  I’m fine with the differences, as it makes it practical to build. Schematic can be found here on PedalPCB.   If you don’t have a power supply that kicks out 18v, Dirtbox … Read more

UNKNOWN: Parametric EQ / State-Variable Bandpass Filter

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I found this schematic a little while ago and thought I might give it a try, as I’ve been looking to make a single band parametric equaliser, in this case, based on a State-Variable Bandpass Filter.   It’s supposed to be from a Japanese textbook, but I’m not sure of its origin.  It looks remarkably similar to a … Read more