Resonant Equalizer
https://www.elby-designs.com/webtek/euro-serge/es22-resonant-equalizer/es22.htm
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Elby Designs ES22 Resonant EQ — ExcellentOriginal owner; smoke-free studioIncludes: module w/ ribbon cable$219 — new was $295 (Noisebug)Free, fast, insured shipping US seller — ships within 24hCondition & careExcellent; studio-kept. Faceplate and rack ears clean, almost unnoticeable wear, fully functioning. FunctionalityFully tested. 10-band filter with resonant bands above +3, three outputs (ALL, UPPER comb, LOWER comb) for stereoizing/feedback tricks; works as expected. WorkflowHaving a mult nearby makes this ResEQ come alive in ways I’ve never heard EQ get carved up. So much fun. Performative with tons of hidden “sweet spots” to be found. Specs17 HP; ~70 mm deep; ±12 V ≈ 43 mA/43 mA (manufacturer). Check your case first! Deep module

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