Klon KTR Overdrive,Klon KTR Centaur Overdrive Pedal - NEW - Sussex Bargains,KLON KTR SHAMROCK MOD – JHS Pedals,Klon KTR Announcement - KTR Diodes | Page 20 | The Gear Page,Kindly remember: feed your Klon KTR/Centaur 9v DC negative tip power! Only the second version of the KTR had an updated protection circuit to keep the Zener diode from burning a hole,