MOD Kits DIY’s Persuader Deluxe tube overdrive pedal kit uses a Darlington preamp to push cascaded triode vacuum tubes into distortion. Four dual-triode tubes are included  – JJ 5751, 12AX7B, JJ 12AU7 and an NOS U.S.-made 12AT7 – which can be swapped to create a range of tones. A Boost switch enhances control over gain and low-end.  An LED indicator lights up when the Persuader Deluxe is engaged and not in true-bypass mode. Read more at www.modkitsdiy.com.