VAMP 8HP Multi-Mode LP/BP/HP Sallen-Key Filter with Tube Saturation & DistortionVAMP is a multi-mode analogue filter that gives you low-pass, band-pass, and high-pass responses in a compact 8HP design. At its heart lies a classic Sallen-Key topology supercharged with real vacuum tube (12AU7) saturation and multiple stages of clipping, letting you move seamlessly from smooth, hi-fi filtering to snarling, overdriven character.One half of the tube is used to saturate the input, while the other half provide MS-20-inspired resonance limiting (tube, not diodes). With FLOW placing the VCA pre-tube or post-filter, and FANGS selecting Off / Soft / Hard output clipping, VAMP ranges from subtle warmth to ferocious harmonic destruction. FEATURES Three filter modes: low-pass, band-pass, and high-pass Classic Sallen-Key topology with tube saturation and clipping 12AU7 vacuum tube: one half for input drive, one half for resonance distortion MS-20-style resonance limiting/clipping for aggressive tones FLOW switch: Integrated VCA pre-tube or post-filter FANGS: output clipping: off / soft clipping / hard clipping 1V/Oct cutoff tracking: use VAMP as a VCO in self-oscillation Extensive CV control: GAIN, FREAK (cutoff), REZ (resonance) (all with attenuverters) Self-oscillation for screaming tones TECH SPECS 8HP 30mm Depth 40mm Max Tube Height from panel Reverse polarity protected +12V 230mA -12V 70mA