The JF-38 Roll Boost is a boost pedal from JOYO. JOYO describes it as using "Classic A circuitry, a flip of the switch gives you up to a 35dB boost," making it a simple level lift for pushing an amp or another drive pedal harder, or for bringing a solo forward1.
What it does
The Roll Boost is a single-purpose pedal: it raises your signal level. JOYO's product page gives the headline figure as up to 35dB of boost, engaged with a switch rather than a multi-control layout1. A boost at that kind of level is typically used to drive the front end of a tube amp into more saturation, to add push to an overdrive or distortion pedal, or to lift volume for solos without changing the core tone.
Controls and switching
JOYO's page describes the boost as being engaged by "a flip of the switch," and the pedal uses a true bypass design, meaning the circuit is taken out of the signal path entirely when off1.
Power and specifications
The pedal supports a maximum input of 18V DC voltage, so it can run at a higher supply than many pedals, where the player's power supply allows it1. JOYO lists its dimensions as 118*62*56mm and its weight as 0.24KG, a compact and light footprint for a pedalboard1. A JF-38 manual PDF is available on JOYO's product page1.
JOYO states the pedal supports a maximum input of 18V DC voltage. Match it to the output of your own power supply before connecting it.
Where it sits in JOYO's range
JOYO makes several other boost pedals that appear on this site, including the Joyo Rated Boost, the Joyo Wild Boost and the Joyo Roll Boost. For shaping tone rather than just level, the Joyo 6-Band EQ covers equalization, and JOYO's drive range includes the Joyo Dr.J Emerald Overdrive, the Joyo Extreme Metal and the Joyo R-05 Maximum, a dual-channel overdrive with a footswitchable boost.
Videos
Coleman's Music
Rockdaypl
PJ and the Beard
Questions
How much boost does the JOYO JF-38 Roll Boost provide?
JOYO says the pedal uses Classic A circuitry and that a flip of the switch gives up to a 35dB boost. That is a clean level lift for pushing an amp or another pedal harder, or for lifting a solo above the rest of a band.
What power does the JOYO JF-38 Roll Boost need?
JOYO states the pedal supports a maximum input of 18V DC voltage. It uses a true bypass design, so the pedal is removed from the signal path when it is switched off.
Sources (1)
- JF-38 Roll Boost_JOYO, JOYO, 2019-12-17
