Jam Pedals set out to create a pedal that combined the singing, dynamic midrange of germanium fuzz with the gritty, full and rounded Muff type of fuzz/dist. And .... Eureka!
With silicon transistors in an all oak architecture to get the best of both worlds, the Eureka! proved to be a phenomenal teammate, giving his best with all sorts of different effects, guitars, and amps, without sacrificing his own distinct personality.
The three-way switch progressively introduces more bottom to the signal, which is an extremely useful feature for switching between single-coil and humbucker-equipped guitars, and also for fleshing out solos. Once you set it to flash mode, and give it a strong enough signal, you can enjoy the Eureka!'s gate fuzz sound.
Used by:
"The Eureka! is very touch sensitive, like some of my favorite Albert King tube amp distortion. With the toggle switch to the right, there's a kind of compression there, where the attack is smeared out before the gigantic note arrives. And the power chord stuff is hilarious, huge snarly stuff. Very adaptable for a variety of inputs, from high powered pickups to single coil. I'm a big fan of JΑM Pedals!"
-Mike Miller
"A wide variety of tones from nasally 60's Fuzzrite to girthy 70's Big Muff vibes and all points in between."
-Sean Ono Lennon
"The Eureka! has a unique voice all of its own and covers a lot of bases. With tones that can easily deliver super-heavy riffs, lead lines with searing mid-rich sizzle, flat out noise annihilation and the addition of enormous bass energy when required, this is a really versatile pedal!" James Sedwards
“Guitar, Eureka!, amp, done.”
-David Thorne






