The JHS 3 Series Harmonic Tremolo is the Kansas City-based company’s take on the effect created by Leo Fender in 1960, a modulation effect that splits the signal into high and low-frequency channels, with the center split frequency constantly changed by an LFO (oscillator), producing a dreamy tremolo effect reminiscent of the Uni-Vibe.

Like all the other effects in the 3 Series, the Harmonic Tremolo features three knobs (in this case Volume, Rate and Depth) and a toggle switch that gives you two tremolo types: amp term and harmonic trem.

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JHS 3 Series Harmonic Tremolo, Builder’s Notes

The JHS Pedals 3 Series is a collection of pedals designed to give you affordability and simplicity without compromising quality. Each 3 Series pedal is made by us in Kansas City, MO, using high-quality parts, quality control, and attention to every detail. Each pedal has three simple controls and one toggle that offer a wide range of sounds, perfect for beginners and professionals alike. The JHS 3 Series will inspire your playing and help you explore new sounds at a totally approachable price point.

In 1960, Leo Fender introduced a circuit in his Bandmaster and Vibrasonic amps called the “Harmonic Tremolo” (which proved to be a misnomer, since it was a volume effect, not a pitch effect). Essentially, the amp’s signal was split into high frequency and low frequency components, with the output switching back and forth between the two, resulting in a dreamy effect similar to the Uni-Vibe. The 3 Series Harmonic Trem allows you to utilize Leo Fender’s revolutionary effect in a package much easier to tote than a vintage amplifier. Toggle up is a great sounding amp trem, while toggle down is our take on harmonic trem effect.