The JOYO EQ-504 is a compact equalization pedal from Joyo. It gives you four bands of cut and boost, covering the low end through to the brightest top end, in a small enclosure that takes up little space on a board.1
Controls and frequencies
The EQ-504 has four controls, each covering a different part of the frequency range. Every band gives plus or minus 12dB of cut or boost, which is enough range to shape a tone noticeably in either direction, from tightening the low end to adding top-end detail1.
| Control | Center frequency | Range |
|---|---|---|
| Bass | 75Hz | ±12dB |
| Middle | 750Hz | ±12dB |
| Treble | 10KHz | ±12dB |
| Presence | 15KHz | ±12dB |
The bass band at 75Hz works on the low-end body of the sound, the middle band at 750Hz covers the core of a guitar tone, and the treble and presence bands at 10KHz and 15KHz sit in the brightest part of the range.1
Joyo also lists tuning specifications on the product page: a tuning range of 0A (27.5Hz) to 8C (4186.01Hz) and an A4 frequency of 440Hz.1
Power and size
The pedal runs on 9V power from a 6F22 battery, the standard 9V block battery. It has a low battery light that warns you when the battery is running down.1
The maker specifies a 6F22 battery as the power source, so plan for battery changes on this pedal rather than expecting an external power input.
It runs on a 9V battery (6F22 type) and includes a low battery light, so you get a warning before the battery dies mid-set. The enclosure uses color silicon buttons and an organic glass panel.1
Where it sits in Joyo's range
Joyo lists the EQ-504 alongside its other equalizer models, and the pedal itself carries a few identifying details: color silicon buttons and an organic glass panel on the enclosure, plus a low battery light.1
Questions
Does the JOYO EQ-504 run on a battery?
Yes. Joyo lists the power requirement as 9V with a 6F22 battery, which is the standard 9V block battery used in many pedals. The pedal also has a low battery light, so you get a visual warning when the battery is running down. Because the maker specifies battery power, a 6F22 battery is what the pedal is designed around.
How big is the JOYO EQ-504?
Joyo gives the dimensions as 73mm long by 48mm wide by 25mm high. That is a small footprint by pedal standards, so it takes up little room on a pedalboard and fits easily between other compact pedals.
Is the JOYO EQ-504 an EQ pedal or a tuner?
It is an equalisation pedal: its four controls are bass, middle, treble and presence, each with a 12dB cut and boost range. Joyo also lists a tuning range of 0A (27.5Hz) to 8C (4186.01Hz) and an A4 frequency of 440Hz on the product page, so the maker includes tuning specifications alongside the EQ functions.
What frequencies does the JOYO EQ-504 adjust?
The four bands are centred at 75Hz for bass, 750Hz for middle, 10KHz for treble and 15KHz for presence. Each control gives plus or minus 12dB of cut or boost at its centre frequency, so you can shape everything from low-end body to the brightest top-end detail.
Sources (1)
- EQ-504_JOYO, JOYO
