The Groovy Wizard Fuzz Driver is for all you wizards of guitar that have been searching for the most dynamic, touch-sensitive fuzz to drive your amp whether it is set clean or overdriven. Groovy Wizard’s open and transparent response lets the character of your guitar and amp shine through while accentuating every playing nuance. The wide ranging controls go from boost to amp-like touch-sensitive overdrive all the way to raging fuzz! And it was specifically designed to extend the range of your guitar's volume control - from amazing cleans, to tight overdrive, all the way to raging fuzz - all by merely turning your guitar's volume control and varying your picking attack.

Adapted and extended from a classic ’60’s two-transistor console preamp circuit originally associated with Jimi Hendrix, the Groovy Wizard is not a mere clone, nor is it a fuzz face. The circuit was modified and voiced from the ground up to achieve the perfect sound + response. Utilizing a combination of a PNP germanium transistor coupled with an NPN silicon transistor running at up to 18 volts, the Groovy Wizard has a greatly increased range of gain from clean to fuzz, more tonal control, bigger soundstage and punch, and more transparency to create the perfect fuzz driver for any musical style or rig.

kittycasterFX

Official Product Video

Review by delicious audio

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Review by Guitar World

Manual

Product Page

Demo by Ambient Endeavors

Groovy Wizard

Tremdriver is a high headroom preamp that makes any rig sound bigger and better combined with a foot-switchable harmonic tremolo that gives you amazingly lush and swirly pulses. Designed to run towards the end of your pedal chain, the Drive and Output controls puts you in clean boost heaven. Then switch on the harmonic tremolo mode, adjust the Speed from a slow pulse to a quick quiver, and prepare to be mesmerized for hours!

Tremdriver combines three EP-3 style JFET preamps running at 24 volts with specially voiced Univibe LFO circuits to create its unique magic. Its novel combination of vintage all-discrete circuit blocks was conjured to create a new pedal that sounds and feels like the classic '70s big wall-powered unit that never was. Don't worry though, it comes in a pedalboard-friendly custom enclosure and runs off of a standard 9-volt power supply so you can get that huge vintage sound without having to have a huge vintage unit on top of your amp.

Demo by Mike Hermanns

Tremdriver Preamp

Der Meerkat Wide Range Boost ist kittycasterFXs moderne Weiterentwicklung des legendären Rangemaster Treble Booster – der Geheimwaffe britischer Rocklegenden der 70er wie Tony Iommi, Brian May, Judas Priest und T-Rex.
Von straffen, schneidenden Riffs bis hin zu schwebenden Leads voller saftiger Obertöne liefert der Meerkat den unverwechselbaren Rangemaster-Sound mit erweiterter Vielseitigkeit.

Mit vier präzise abgestimmten Reglern – Boost, Gain, Range und Smooth – können Sie Ihren Sound formen. Egal, ob Sie klassische Töne, sauberen Boost, satten Full-Range-Boost oder cremige Höhentexturen suchen, der Meerkat gibt Ihnen die Möglichkeit, die einzigartigen Töne zu erzeugen, die Sie suchen.
Der Meerkat wurde für die dynamische Zusammenarbeit mit dem Lautstärkeregler Ihrer Gitarre entwickelt und ist mehr als ein Effekt – er ist eine Erweiterung Ihres Instruments.

The Meerkat Wide Range Boost is kittycasterFX’s modern evolution of the iconic Rangemaster Treble Booster—the secret weapon of 70s British rock legends like Tony Iommi, Brian May, Judas Priest, and T-Rex.
From tight, cutting riffs to soaring leads brimming with juicy harmonics, the Meerkat delivers that unmistakable Rangemaster tone with expanded versatility.

Four precisely voiced controls—Boost, Gain, Range, and Smooth—let you shape your sound. No matter if you’re chasing classic tones, clean boost, rich full-range boost, or creamy treble textures, the Meerkat gives you the power to craft the unique tones you’re searching for.
Designed to work dynamically with your guitar’s volume control, the Meerkat is more than an effect—it’s an extension of your instrument.

Review by Stompbox Steals

Meerkat

Continuing our quest for the ultimate in sound + response is Mohair, a five-transistor fuzz/distortion that delivers a refined take on the classic muffy tone. Mohair gives you thick walls of sound and fat, sustaining leads but while retaining a more open, touch-sensitive response. The boost footswitch activates a Rangemaster-style booster circuit in front that transforms Mohair into a blazing riff monster. The Range control lets you dial in how thick the boost is - go from tight, speedy riffs to endless, thick, sustaining notes.

Mohair Fuzztortion