Brand

Joyo

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.

Category

EQ Pedals

Equalisation changes the level of selected frequency regions without intentionally adding modulation or time-based effects. Graphic EQ divides the spectrum into fixed bands, parametric EQ allows frequency and bandwidth to move, and simpler designs provide broad bass, middle and treble shaping. Available boost or cut, centre frequencies, filter width and overall output level determine whether the pedal makes corrective, tonal or gain-driving changes.

Preamps

Preamps raise and shape a source before it reaches an amplifier, recorder, mixer or power stage. In a pedalboard context they may provide EQ, gain, instrument-specific voicing, balanced outputs, cabinet filtering or a direct signal path. The key choices are input impedance, available headroom, noise, output level and whether the unit expects an amplifier return, interface or PA. A preamp can be an always-on foundation or a complete direct rig, but its routing should be checked before connecting it to another gain stage.

Tags

Acoustic

Voiced for the wider dynamics, strong transient detail and pickup characteristics of acoustic instruments. High input impedance, phase reversal, notch filtering and restrained processing help preserve body resonance while controlling piezo harshness and feedback. Balanced outputs may also carry the corrected signal directly to a mixer or interface.

Amp

Amp is a broad catalogue label for amplifier-related products, amp voices and compact amplifier solutions. The products may include amp-style pedals, practice amplifiers, headphone outputs or direct rigs, so the tag does not describe one circuit by itself. Check whether the unit is meant to drive a speaker, feed an effects return, simulate an amplifier into a mixer or provide a headphone output, and follow the specified load and routing.

Amplifier

Amplifier is a general label for products that raise signal level or provide an amplifier voice. In the JustPedals catalogue this may include compact amps, pedalboard amplifiers, headphone amps and amp-style effects. Check the intended source, output load, cabinet or headphone requirement, power supply and whether the unit includes speaker simulation before connecting it to a pedalboard, interface or PA.

EQ

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.

Joyo

Joyo pedals and related effects are commonly used by guitarists looking to shape their tone in a more focused and creative way. Different designs offer their own response, feel and tonal character depending on the style of music and the type of amplifier or guitar being used.

Many players build pedalboards gradually over time, combining different effects and utilities to create a setup that suits their own sound and workflow. Joyo related gear can play an important role in both live performance and studio recording.

Preamp

Preamp products raise and shape an instrument signal before it reaches an amplifier, recorder, mixer or power stage. They may add EQ, gain, instrument-specific voicing, balanced outputs, cabinet filtering or a direct path. Check input impedance, headroom, noise, output level and whether the unit expects an effects return, interface, PA or real cabinet. A preamp can be an always-on foundation or a complete direct rig, but the routing should be confirmed first.

Tuner

Tuner products provide a visible or silent way to check pitch at the start of a signal chain. Accuracy, calibration range, detection speed, display visibility, mute switching and bypass type affect how well they suit a live board. Polyphonic tuners can show several strings at once, while chromatic designs may offer more detailed single-note feedback. Check the input and output arrangement, power draw and display readability under the intended stage lighting.