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Source Audio


Source Audio One Series True Spring Reverb Effects Pedal

Product Information

Turn on to the vintage charm of natural spring reverb coupled with pulsing tremolo. Source Audio doesn’t depend on the off-the-shelf reverb effects processors found in many modern reverb pedals, Source Audio meticulously craft every one of their proprietary effects engines and load them to high-powered, 56-bit Sigma DSP. The two man engineering team of Bob Chidlaw and Jesse Remignanti put years of collective man-hours into capturing every nuance and idiosyncrasy of the spring reverb and tremolo effects from some of the music gear industry’s most iconic guitar amps and outboard gear. The result is indisputable sound quality with magnificent tonal depth and precision.

The True Spring’s reverb effects are based on a mechanical design originated by the Hammond Organ Company™ in the late 1930s. They include the Short Spring Reverb: Modelled after the unmistakable twang of "blackface" amplifiers of the 1960s. Long Spring Reverb: Produces long and deep reverb decays with noticeable “drip” and highly animated trails. Tank Spring Reverb (Outboard Spring): Captures the unmistakable effect of the tube driven outboard spring tanks of the 60s.

The True Spring Reverb also allows you to combine any of its iconic spring reverbs with any of the pedal's three tremolo effects. These are the Opto Tremolo: Optical tremolo (a.k.a. “Photocell Tremolo”) is the effect found in many combo amps of the 1960s. Harmonic Tremolo: This unique effect first appeared in Fender™ “brownface” amps made between 1959 and 1963, which alternately modulated the levels of bass and treble frequencies in the audio signal. Bias Tremolo: This approach to tremolo involves using an LFO to modulate the bias voltage of the tubes in an amplifier.

Out of the box, the True Spring Reverb couldn’t be simpler – just plug it in, select from the three onboard reverb engines, dial in some tremolo if you like, and start making beautiful music. But something deep and powerful resides just below the surface - the truly “Big Idea” behind all of the One Series pedals is the second, far deeper, set of options and editing tools for crafting the perfect tone. The Neuro Mobile App is available for free at the App Store (iOS) and Google Play (Android). The Neuro Desktop Editor is available as a free download for Mac or Windows systems on Source Audio's Downloads page. These powerful editing tools offer an advanced collection of deep editing parameters. After customising your sound, burn it directly to the pedal and easily access it any time without having to reconnect the Neuro Mobile App or Neuro Desktop Editor.


    • 3 Distinct Spring Reverb and Tremolo Effects
    • Two Modes of Operation - Standard or Preset Mode
    • Flexible Stereo Routing
    • Universal Bypass — select either analog buffered or relay based True Bypass
    • Secondary Tremolo Controls
    • Expression Control
    • Store and edit presets with the Neuro App
    • External Tap Tempo
    • External Tremolo Engage and Bypass
    • Includes 9v DC power supply (300mA / Negative Tip)
    • Includes 1/8” to 1/4” cable for Neuro Mobile App connection
    • Power Consumption — 165mA
    • USB port — Connects to Mac or Windows PC for firmware updates and effects editing
    • Brushed anodised aluminium housing