The Multivox Big Jam SE-4 Octave is a rare and characterful vintage effects pedal from the late 1970s, designed to deliver bold octave tones and rich analog textures. Made in Japan and part of the iconic Big Jam series by Multivox, the SE-4 has developed a cult following among collectors and sonic explorers due to its raw, gritty voice and unmistakably vintage sound signature.
The SE-4 Octave is capable of generating a powerful octave-down effect that thickens your guitar tone, adding an aggressive, synth-like growl that’s ideal for fuzzed-out riffs, drone-heavy passages, or experimental textures. Unlike modern octave pedals, the SE-4 has a distinctly lo-fi character that adds warmth and unpredictability, making it a creative tool for guitarists, bassists, and even synth users.
With a simple, intuitive control layout, the Big Jam SE-4 lets you blend the octave signal with your dry tone and tweak the effect to match your playing style. While it never gained mainstream fame, it remains a hidden gem for players who appreciate vintage analog gear with a unique sonic identity.
Used by fans of early experimental rock, psychedelic tones, and Japanese boutique gear, the SE-4 is a window into a bygone era of effect pedal design. This unit is fully functional, tested, and ready to add something truly unique to your setup.
