8HP Multi-Mode LP/BP/HP Sallen-Key Filter with Tube Saturation & Distortion VAMP 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 powers the resonance feedback path with an MS-20-style clipping stage. Combined with assignable VCA placement (pre- or post-filter) and a dedicated output clipping circuit, VAMP delivers everything 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 path clipping for aggressive tones Integrated VCA switchable pre- or post-filter via Flow toggle Three-way output clipping: off / soft clipping / hard clipping 1V/Oct tracking: use VAMP as a VCO in self-oscillation Extensive CV control: VCA gain, frequency modulation (FM), and resonance (Q) Self-oscillation for screaming acid tones Tech Specs Width: 8HP Depth: 30mm Tube Height from panel: 40mm Power: +12V 230mA / -12V 70mA Reverse polarity protected
