(PSA series; sold separately)
These adjust the volume of the eect sound. Clockwise rotation raises the volume
and counterclockwise rotation decreases.
The JB-2 is a distortion pedal cooperatively developed by JHS PEDALS and BOSS.
7It is equipped with two completely independent distortion eects designed respectively by JHS PEDALS and BOSS.
7By switching modes, you can use the JHS PEDALS and BOSS sounds individually, or use them together in series (with your choice of connection order) or parallel to create a wide variety of rock sounds.
7If you connect a footswitch to the REMOTE jack, you can use it in conjunction with the pedal switch for additional options, such as switching between distortions or turning the eect on/o.
Connect an amplier to this jack.
Accepts connection of an AC Adaptor (PSA series; sold separately). By using an AC Adaptor, you can play
without being concerned about how much battery power you have left.
* We recommend that you keep batteries installed in the unit even though you’ll be powering it with
the AC adaptor. That way, you’ll be able to continue a performance even if the cord of the AC adaptor
gets accidentally disconnected from the unit.
* Use only the specied AC adaptor (PSA-series).
* If the AC adaptor is connected while power is on, the power supply is drawn
This indicator shows whether an eect is ON/OFF, and doubles as the Battery Check indicator.
The indicator lights when an eect is ON. The indicator also shows which eect is active: JHS
Indicator color Eect type
Purple Both JHS PEDALS and BOSS
* If this indicator goes dim or no longer lights while an eect is ON, the battery is near
exhaustion and should be replaced immediately.
These adjust the tone of the eect sound. As you rotate the knob clockwise,
higher frequencies are emphasized, and counterclockwise cuts them.
This switch turns the eect on/o or switches between the two types of
* The operation that occurs when you press the pedal depends on the mode.
For details, refer to “Operation at a Glance.”
When this screw is loosened, the pedal will open, allowing you to change the
* For instructions on changing the battery, refer to “Changing the Battery.”
This switch switches between modes (JHS, BOSS, JHS/BOSS, J J, PARALLEL).AB, BA
For details, refer to “Mode List.”
These adjust the depth of the distortion eect. Rotating the knob clockwise
deepens the distortion creating powerful distortion eect.
Rotating the knob counterclockwise makes lighter distortion.
Some settings might cause the JB-2 to oscillate or might result in
increased noise, but this is not a malfunction.
To prevent malfunction and equipment failure, always turn down the
volume, and turn o all the units before making any connections.
Once everything is properly connected, be sure to follow the
procedure below to turn on their power. If you turn on equipment in
the wrong order, you risk causing malfunction or equipment failure.
When powering up: Turn on the power to your guitar amp last.
When powering down: Turn o the power to your guitar amp rst.
Before turning the unit on/o, always be sure to turn the volume
down. Even with the volume turned down, you might hear some
sound when switching the unit on/o. However, this is normal and
does not indicate a malfunction.
If operating this unit on batteries, please use alkaline or carbon
When operating on battery power only, the unit’s indicator will
become dim when battery power gets too low. Replace the
battery as soon as possible.
If you handle batteries improperly, you risk explosion and uid
leakage. Make sure that you carefully observe all of the items
related to batteries that are listed in “USING THE UNIT SAFELY” and
“IMPORTANT NOTES” (supplied on a separate sheet).
old battery from the battery housing, and remove the
snap cord connected to it.
3. Connect the snap cord to the new battery, and place
the battery inside the battery housing.
* Be sure to carefully observe the battery’s polarity (+ versus -).
4. Slip the coil spring onto the spring base on the back of
the pedal, and then close the pedal.
* Carefully avoid getting the snap cord caught in the pedal, coil
spring, and battery housing.
5. Finally, insert the thumbscrew into the guide bush
hole and fasten it securely.
Use the MODE knob to select the eect you want.
JHS A high-gain distortion with a design based on the “Angry
Charlie” made by JHS PEDALS.
It’s a classic sound with a distinctively rich low-frequency
BOSS An overdrive with a design based on the BOSS “BD-2”
It’s noted for a broad range of expression that responds
to your guitar volume and picking dynamics. With a
broad range of gain variation, you can create a wide
variety of sounds from crunch to hard rock.
JHS/BOSS Switch between the “JHS” and “BOSS” eects.
B (*1) Series connection in the order of “JHS”
J (*1) Series connection in the order of “BOSS”
PARALLEL (*1) “JHS” and “BOSS” circuits connected in parallel.
(*1) Both JHS PEDALS and BOSS are on.
This table shows the operations of the pedal switch and of a
footswitch connected to the REMOTE jack.
MODE Pedal switch Footswitch
Eect ON/OFF Switch between JHS/BOSS
JHS/BOSS Switch between JHS/BOSS Eect ON/OFF
Nominal Input Level -20 dBu
Nominal Output Level -20 dBu
Power Supply Alkaline battery (9 V, 6LR61) or
Carbon-zinc battery (9 V, 6F22)
AC adaptor (sold separately)
* Expected battery life under continuous use:
Alkaline: Approx. 7 hours
Carbon: Approx. 2.5 hours
These gures will vary depending on the
actual conditions of use.
Dimensions 73 (W) x 129 (D) x 59 (H) mm
2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches
Weight 445 g / 1 lb (including battery)
Leaet (“USING THE UNIT SAFELY,”
“IMPORTANT NOTES,” and “Information”)
Alkaline battery (9V, 6LR61)
Footswitch: FS-5L, FS-6, FS-7
* The FS-6 and FS-7 can be used only in latch
* This document explains the specications of the product at the time
that the document was issued. For the latest information, refer to the
Here you can connect a latch-type footswitch (sold separately: FS-5L, FS-6, FS-7).
* In the case of the FS-6 or FS-7, only latch mode can be used.
By operating the footswitch you can switch between the two
types of distortion or turn them on/o individually.
For details, refer to “Operation at a Glance.”
Intellectual Property Right
• Roland, BOSS, BLUES DRIVER are either registered trademarks or
trademarks of Roland Corporation in the United States and/or other
CMSIS-RTOS RTX Version 4.70.1
Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
Redistribution and use in source and binary forms, with or without
modication, are permitted provided that the following conditions are
• Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
• Neither the name of ARM nor the names of its contributors may be
used to endorse or promote products derived from this software
without specic prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBU-
TORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
This jack accepts input signals (coming from a guitar, some other electric or
electronic musical instrument, or another eects unit).
* The INPUT jack doubles as the power switch.
Power to the unit is turned on when you plug
into the INPUT jack; the power is turned o
when the cable is unplugged.
To prevent unnecessary battery consumption,
be sure to disconnect the plug from the INPUT
jack when not using the eects unit.
Before using this unit, carefully read the sections entitled: “USING THE UNIT SAFELY” and “IMPORTANT NOTES” (supplied on a separate sheet).
After reading, keep the document(s) where it will be available for immediate reference.
© 2017 Roland Corporation
