Electro-Harmonix Soul Preacher Circuit Electro-Harmonix Soul Preacher Circuit Electronic. The circuit using IC 4558 Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)
