JOYO JF-04 High Gain Distortion Guitar Pedal with Full-Range EQ

Shape a guitar part from classic rock crunch to heavier rhythm distortion with the JOYO JF-04. Its high-gain range and adjustable EQ let you tailor the pedal’s sound to the role you need in a song.

The analogue circuit responds to picking dynamics and guitar-volume adjustments, giving you a way to move between a lighter breakup and fuller saturation as you play.

For players choosing between a fixed distortion sound and more hands-on tone shaping, the JF-04 offers Gain, Treble, Mid and Volume controls in a compact pedalboard format.

Key points

The JF-04 covers a broad distortion range, from a bluesy edge to a thicker, more aggressive sound suited to hard rock and heavier metal. Its Treble and Mid controls help shape the result: bring the mids forward for a more pronounced lead tone, or reduce them for a scooped rhythm character. Gain sets the amount of distortion, while Volume adjusts the output level.

An analogue circuit gives the effect a dynamic response to picking and guitar-volume changes. True bypass keeps the pedal out of the signal path when the effect is switched off. The casing is made from aluminium alloy, with a compact format intended to fit on a pedalboard.

Buyer feedback is positive about the sound and build, while opinions vary on distortion and overall reliability. Some buyers also mention noise, so practical setup matters: use suitable power and securely connected audio cables, and adjust Gain and Volume to suit your playing rather than leaving both at maximum.

Size & fit

At 380 g, the JF-04 is a manageable addition to a pedalboard or a guitar setup kept ready for practice. Its 1/4-inch mono input and output connect it in a guitar signal chain. This is a high-gain distortion pedal designed for electric guitar, with controls that make it useful when you want to shape rhythm and lead sounds rather than rely on a single fixed setting.

How to use it

Connect the guitar to the input and the output to the next part of your signal chain, then set Gain, Treble, Mid and Volume to suit the part. Start with moderate Gain and Volume, and adjust the EQ to bring out the character you want. For a tighter rhythm sound, try reducing the mids, for a more forward lead tone, raise them. The response also changes with picking strength and guitar-volume adjustments, giving you another way to shape the sound while playing.

Power the pedal with a 9V DC adapter or a 6F22 9V battery. The power supply and battery are not included. The specified draw is 11mA, use DC 9V with centre-negative polarity, and avoid a 12V supply. When an adapter is connected, battery power is automatically cut off.

Questions before you buy

What styles can the JF-04 cover? Its gain range is described for sounds from classic rock and bluesy crunch through hard rock and heavier metal distortion. The EQ controls let you adjust the tone for different parts.

Can I shape the mids and treble separately? Yes. Dedicated Mid and Treble knobs let you adjust those parts of the tone, alongside Gain and Volume.

What power and connections does it use? It uses a 9V DC adapter or a 6F22 9V battery, with centre-negative polarity for the adapter. Guitar connections are 1/4-inch mono input and output, and the power supply and battery are sold separately.

When it makes sense

Choose the JOYO JF-04 when you want one compact pedal to move between classic rock crunch and high-gain distortion, with separate Mid and Treble controls for shaping the sound. It suits electric-guitar players who value hands-on adjustment for rhythm and lead parts and want true bypass when the effect is off.