Relatively new to the Seymour Duncan product line is the guitar effects pedal series. The first pedal introduced was the SFX-01 Pickup Booster, a clean booster. The second pedal introduced was the SFX-02 Tweak Fuzz, a fuzz pedal with a "Tweak" switch that switches between six modes of fuzz. Introduced at Winter NAMM in 2006 was the SFX-03 Twin Tube Classic, a dual mode tube distortion pedal featuring a duet of NOS Phillips-Sylvania 6021 dual triodes. Their latest stompboxes are the SFX-05 Lava Box distortion and SFX-06 Paranormal bass direct box.