This is no off-the-shelf graphic EQ – plug in and your signal begins with a high-impedance instrument preamp to condition nearly any passive or active pickup.

Then, use the four bands of acoustic tone control
to sculpt your bass, mids, treble, and brilliance. A sweepable Low Cut fine-tunes the very low frequencies to reduce or enhance thumps and subs.

Finally, hold the footswitch to toggle your output polarity. Also known as “phase,” this simple circuit can tame low-frequency howl very effectively.