Dual-triode 12dB LPF
https://www.metasonix.com/rk6-resonant-lowpass-filter/
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Metasonix RK6 Resonant LPF — MintOriginal owner; smoke-free studio.Includes: original box and owner’s manual.$399 — typically $500 new (save $101)Free, fast, insured shippingUS seller — ships within 24h.Condition & careMint (basically Brand New); studio-kept. Faceplate clean, zero rack rash (only racked with nylon washers)FunctionalityFully tested; works as expected. Tube 17JK8; warms-up normally; vactrol-tuned Sallen-Key LPF (resonant / LPG-like behavior). Completely unique.WorkflowUse it as a resonant LPF or as a sound design tool, what it does to drums is wild. It loves CV, lots of hidden “sweet spots” to be found. InclusionsRK6 module, original box, paper manual, ribbon cable

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