The JF-20 Moist Reverb is a digital reverb pedal from Joyo, built around a 32-bit DSP chip and offering three reverb modes: Studio, Church and Plate. It sits in the compact JF series enclosure, in light blue, and is shaped with three knobs, Mix, Tone and Decay, plus a mini-toggle for choosing the mode.12
What the JF-20 does
Joyo describes the Moist Reverb as a digital reverb effects pedal that produces what the company calls "fabulous reverb tones its high quality algorithm has to offer."1 The three modes cover the most common reverb uses: Studio for a room-style ambience, Church for a longer space, and Plate for the dense, smooth character of a plate reverb. A mini-toggle selects between them.2
The three knobs give the main shaping. Mix sets how much reverb is blended with the dry signal, Tone shapes the character of the reverb itself, and Decay sets its length. Joyo says the "MIX, TONE&DECAY knobs offer great versatility."1
Controls and connections
| Control | What it does |
|---|---|
| Mode mini-toggle | Selects Studio, Church or Plate mode2 |
| MIX knob | Adjusts the reverb mix1 |
| TONE knob | Shapes the reverb tone1 |
| DECAY knob | Sets the reverb decay1 |
| Footswitch | True-bypass switching on and off2 |
Connections follow the standard pedal arrangement: a 1/4" mono audio jack input with an impedance of 470k Ohms and a 1/4" mono audio jack output with an impedance of 100 Ohms.1
Power
The JF-20 runs on a DC 9V power adapter with a center minus plug and draws 140mA.1 gearnews.com's report likewise describes it as powered "by an external 9V DC power supply."2
There is no battery option. At 140mA the pedal also needs a supply output that can deliver that current, so a low-current daisy-chain output shared with several pedals may not be enough.1
Size and what is in the box
The enclosure measures 120mm deep by 72mm wide by 55mm high and weighs 280g, a compact footprint that fits a standard pedalboard slot. The listed accessory is the owner's manual.1
What reviewers said
gearnews.com covered the pedal when it was announced in September 2021, with the RRP yet to be confirmed at that time. The writer saw it as a straightforward reverb for players who use a small amount of the effect: "If the pedal is rugged enough, and you like the way it sounds, it could be a handy addition to your pedalboard." On its limits, the same writer said, "I just doubt it will be ideal for anyone needing something more expansive, or experimental."2
Where it sits in Joyo's range
The JF-20 is one of several reverb pedals Joyo makes. The company's Joyo R-14 Atmosphere offers nine reverb types rather than three, and the JOYO Space Verb is another option in the range. For a wider look at what reverb pedals do and how they differ, see the Reverb Pedals page1.
Videos
JOYO AUDIO
JOYO Direct
TheGuitarGeek
Questions
Is the Joyo JF-20 Moist Reverb true bypass?
Yes. gearnews.com's report on the pedal describes a true-bypass footswitch, so when the effect is off your guitar signal passes through without the reverb circuitry in the way. The same footswitch switches the effect on and off during play.
What power supply does the Joyo JF-20 need?
Joyo specifies a DC 9V power adapter with a center minus plug. The pedal draws 140mA, so it needs its own supply output rather than being shared on a low-current daisy chain. There is no battery option, so an external adapter is required.
Does the Joyo JF-20 run on a battery?
No. Joyo's product page lists power requirements as a DC 9V power adapter with a center minus plug, and gearnews.com likewise describes the pedal as powered by an external 9V DC supply. No battery operation is offered.
What reverb modes does the Joyo JF-20 have?
Three: Studio, Church and Plate. You select between them with a mini-toggle switch, and each mode is shaped further with the Mix, Tone and Decay knobs.
Is the Joyo JF-20 analog or digital?
Digital. Joyo says the pedal uses a high performance 32-bit DSP chip to generate its reverb, with three modes drawn from the company's high quality algorithm.
How big is the Joyo JF-20 Moist Reverb?
Joyo lists the enclosure at 120mm deep by 72mm wide by 55mm high, weighing 280g. That is a standard compact pedal footprint that fits a typical pedalboard slot.
Sources (2)
- JF-20 MOIST REVERB_JOYO, JOYO
- Joyo JF-20 Moist Reverb: A 32-bit DSP pedal with an unfortunate name, gearnews.com, 2021-09-24
