T.H. SVF:  4hp, 2-pole, 12dB, State Variable Filter:  $130

2 Audio ins: In I: AC coupled, In II: DC coupled

2 CV ins: one 1V/OCT matched transistor/temperature compensated in(accepts +/- voltage), and another envelope/exponential cv in with attenuator(accepts +/- voltage).

low pass, band pass, and high pass out

Current Consumption: +12v: 23mA max, -12v: 13mA max

Depth: 46mm deep, skiff friendly.

Reverse power protected

panel is made of laser cut acrylic. based on the Thomas Henry VCF-1

The Zlob Modular T.H. SVF filter does self oscillate at full resonance with no external audio input.  There are two resonance settings selectable by a jumper on the PCB: max resonance produces a trapezoid wave while min resonance(jumper in left position) produces an almost sine like waveform. The filter can also be used as an lfo through audio range oscillator, although higher registers experience amplitude/wave shape fluctuations. When self oscillating with an external audio source present, the filter produces pseudo chaotic instabilities which are also dependent on the resonance settings, and overdriving or attenuating the audio ins.

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more demos in the video section


T.H. EQ: 4hp 3 band EQ: $70

The Zlob Modular T.H. EQ is a simple 3 band equalizer which boosts or cuts the low, mid, or high frequencies of your audio source.  It passes sound relatively un-altered with each band set at noon. This is not a filter, and full cut settings of all bands will not fully eliminate your source.This EQ is AC coupled so it’s best for audio although it’s possible to eq cv with some interesting results.

Skiff friendlyReverse power protected.

panel is made of laser cut acrylic. based on a Thomas Henry design

Current Consumption: +12v: 7mA , -12v: 5mA. no more than 10mA each rail

demos in the video section

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Attenumixer: 4hp attenuator/mixer: $45

The Zlob Modular Attenumixer is a three channel passive attenuator with a sum. Each channel is normalled to the sum(VI) so it can be used as a 2 channel mixer and 1 channel attenuator, or a 3 channel mixer, or as 3 separate attenuators. Normalization to the sum is broken by inserting a jack into the outs of channels I-III. The Attenumixer works well with both cv and audio, although the potentiometers have a linear response. Since this module is passive there will be some amount of signal loss with the sum out.

Current Consumption: 0mA

skiff friendly. panel is made of laser cut acrylic.

demos in the video section

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