This is a New JOYO JF-15 California Sound Amp Simulator Pedal from Joyo, listed in Amp & Cab Simulator Pedals on Just Pedals. Read More below.
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The JOYO JF-15 is an amplifier and cabinet-simulation pedal. It is intended for shaping an instrument signal with amplifier or cabinet-style voicing.
Key identified features include boost, overdrive, and EQ control.
JOYO Technology is a Shenzhen music-gear company whose range goes well beyond stompboxes. Its official catalogue covers guitar and bass amplifiers, acoustic and busking amps, effects, power supplies, interfaces, wireless systems and accessories. JOYO also says it develops acoustic-core technology and has applied for utility patents. JustPedals listings include the JF-21 Splinter distortion and JF-319 Green Legend overdrive, alongside mini amps and power adapters. That breadth matters when comparing products under the JOYO name: some are effects, while others support the rest of a guitar or bass rig.
Amp and cabinet simulators reproduce the gain stages, tone stack, power-amp response, loudspeaker colour and microphone character of a recorded amplifier chain. Analogue circuits, digital models and impulse responses approach this in different ways. The important distinctions are the available amp and cabinet types, editable microphone or room settings, latency, output routing, preset recall and whether speaker simulation can be bypassed for a real amplifier.
Raises signal level and may also reshape the frequency balance before the next stage. A clean boost preserves the waveform until headroom is exceeded, while coloured designs emphasise particular frequencies or add mild clipping that changes how later gain stages respond.
Raises or lowers defined frequency regions. Fixed-band graphic controls provide direct visual shaping, while parametric controls vary centre frequency and bandwidth; the available range and filter width determine whether the change is broad tonal balance or narrow corrective filtering.
Uses moderate clipping and gain-dependent compression to add harmonics while retaining much of the original note contour. Bass filtering, mid emphasis, clipping symmetry and available headroom decide whether it sounds open and amplifier-like, tightly focused or heavily saturated.
