This is a New JOYO JF-38 Roll Boost Pedal from Joyo, listed in Boost Pedals on Just Pedals. Read More below.
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The JOYO JF-38 is a boost pedal. It is intended for increasing signal level and driving following pedals or an amplifier harder.
Key identified features include true-bypass switching.
In the current JustPedals catalogue, Joyo is represented by Distortion Pedals, Overdrive Pedals and Amplifiers & Headphone Amps. Current listings include Cab Box, D56 Fuzz and D54 Delay. That makes the range relevant to players looking for drive, gain and clipping, plus time-based effects and ambience. Check each model for its exact circuit or processing platform, controls, power requirements and connections, particularly where the catalogue includes both pedals and supporting gear.
A boost raises signal level without deliberately creating a new effect waveform. Clean boosts emphasise level and headroom, while coloured boosts reshape bass, midrange or treble and may add mild clipping at higher settings. Placed before a gain stage, the extra level changes how that stage distorts; placed later, it can provide a volume lift if sufficient headroom remains.
Connects input directly to output through mechanical or relay switching when the effect is off, removing the active circuit from the audio path. It avoids buffer colour but leaves cable capacitance and switching design to influence high-frequency loss and possible switching noise.
