Fulltone Supatrem JR

A Reimagined Supa-Trem: More Compact, More Flexible, Still in the Spirit of the ST-1

The Supa-Trem Junior carries the sonic DNA of the Supa-Trem 1 while advancing ergonomics and live performance capabilities. The heart of the circuit remains: the JFET preamp (Analog Devices) which delivers an organic, slightly "thickened," very musical character, especially when played harder. In the Junior version, the format is ultra pedalboard-friendly thanks to top-mounted jacks and a road-ready chassis, without compromising what has made the series famous: an expressive optical tremolo with a deeply "vintage" feel.

Who Is It For? From Studio Guitarists to Stage Musicians Who Want a Tremolo with Tempo

This pedal is aimed at guitarists seeking a precise and musical tremolo, suitable for both subtle textures and pronounced rhythmic effects. In blues, surf, rock, or indie, it allows quick pulse dialing with tap tempo, and the Half/Double function is ideal for switching from a laid-back verse to a more energetic chorus without adjusting settings. In the studio, it shines with stability and consistency at low and high volumes, and live it simplifies life: visible tempo, silent switching, and genuinely useful foot control.

Tap Tempo, Half/Double, 3 Waveforms: A "Smart" Pedal Without Sacrificing Analog

The Supa-Trem Junior combines a dedicated digital brain for the oscillator (solely to manage modulation) with a 100% analog audio signal. The result: the precision of modern control with the feel and dynamics of an analog circuit. The Tap Tempo is built-in, and a 6.35mm Jack input allows adding an external tap. The Half/Double function is activated by holding the Tap switch for about 3/4 of a second, providing real performance control to double or halve the speed on the fly.

The speed range is particularly wide: the pedal can go very slow (a full cycle of about 10 seconds ) and reach fast speeds beyond 220 bpm. Regarding character, the waveform selector offers a square (sharp and rhythmic), a modified sine (softer, more "old school"), and a warble that adds a livelier, almost pulsed movement, perfect for adding depth to sustained chords.

The Sound

This is an optical tremolo with a meaty and expressive output, very responsive to attack: notes remain clear and the effect integrates without "squashing" the playing. The modified sine waveform encourages a natural movement, ideal for thickening a clean or light crunch, while the square turns the guitar into a true rhythmic engine, ultra-effective for staccato parts. The warble mode adds a more organic, "pulsing" vibration that evokes a less mechanical modulation. And if you're looking for a pedal that also provides a clean boost, the Supa-Trem Junior can transform: by pushing the Mix, you get up to 15 dB to stand out in a mix or drive an amp without excessive coloring.

Technical specifications

Effects	Tremolo, Boost, Effects	Type	sector
Technology	Analog & Digital	Use	electric guitar
Format	Pedal	Color	Black

3 switchable waveforms	square, modified sine, warble	Power supply	9V to 18V DC
Extended speed range	full cycle about 10 seconds at slowest, fast speeds beyond 220 bpm	Current consumption	30 mA
Dimensions	76 mm (width) x 102 mm (depth) x 51 mm (height)