Guitar Pedal X - GPX Blog - Muir Audio Design's Morphtone EQ - a Morphing Dual Parametric EQ - delivers an innovative and powerful new way for shaping your instruments' output tone
ParaEq – Empress Effects Inc.
pPTSD - Parametric EQ
Amazon.com: Stax Guitar EQ Pedal 5-Band Parametric Equalizer Frequency Compensator Guitar Effects Pedals ± 18dB Range Mini Size True Bypass : Musical Instruments