The Kilpatrick Audio K6501 Philter was first released as a component of their Phenol modular synthesizer. The multimode filter achieves a characteristically high resonance and fat, filthy overdrive. Additionally, it sports low-pass, bandpass, and high-pass outputs, each of which can be used simultaneously.
Filter circuit inspired by PHENOL and true to the sound and range of control
Simultaneous low-pass, band-pass and high-pass outputs
Unique two-pole design with special resonance limiter for huge peaks without oscillation
Control over cutoff, resonance and FM level (voltage control of frequency)