Electric Guitar
English
9 V DC OUT jack
When an AC adapter is used, you can connect a PCS-20A parallel DC cord (optional) to supply power to
eects processors and other PSA adaptor-compatible gear.
* Power cannot be supplied from the DC OUT jack when the NS-2 is running on batteries.
* If you use the PCS-20A to supply power to devices that are
compatible with PSA adaptors, make sure that the total current
consumption of all devices (including the NS-2) does not
exceed the maximum output current of the PSA series unit
you’re using.
REDUCTION indicator
This indicator os lit when the noise reduction function is being engaged.
7 The BOSS NS-2 is a completely new type noise suppressor that features the SEND and RETURN jacks.
7 The NS-2 can detect the instrument signal separately from the noise comes from each eect unit connected between the SEND and RETURN. This makes it possible to reduce the noise of each eect unit whether it is turned on or o.
7 Dierent from the past noise suppressing system, the NS-2 features a high-quality VCA and high-speed envelope-detecting circuits, and the expander starts its function when the volume of the instrument becomes lower than the
threshold level. Therefore, natural noise reducing eect is obtained without deteriorating the sound quality and expression.
7 The NS-2 works as a noise-gate unit, cutting the noise and hum that occur between song intervals or at break.
7 You can use the Pedal Switch eectively as a mute-switch when tuning or changing guitars, as for a Normal/Eect switch.
7 The 9 V DC OUT jack is provided ti connect to the optional Parallel DC Cord (PCS-20A) for supplying power to the other 9 V eect units.
OUTPUT jack
The output jack is used to connect the unit to
ampliers or other devices.
Guitar Amplier
CHECK/MUTE indicator
This indicator lights when the eect (Noise reduction or Mute whichever
selected) is on.
This indicator also serves as battery check.
* If this indicator goes dim or no longer lights while an eect is ON, the
battery is near exhaustion and should be replaced immediately.
* The CHECK indicator shows whether the eect is on or o, and indicates
the dierent functions. It does not indicate whether the power to the
device is on or not.
THRESHOLD knob
This sets the threshold level where the noise suppression starts working.
Adjust it depending on the signal level and noise level, and when too low,
counterclockwise.
Pedal Switch
By pressing the pedal, eect ON/OFF (Normal/Reduction in the Reduction mode
and Reduction/Mute in the Mute mode) can be controlled.
SEND jack
Through this jack, the input signal is sent to external eect devices.
Thumbscrew
When this screw is loosened, the pedal will open, allowing you to change the
battery.
* For instructions on changing the battery, refer to “Changing the Battery.”
RETURN jack
This is where the signals from the eect units
are returned.
Panel Descriptions
Main Features
Operating the Unit
1. Make all the necessary connections.
* You can also set up the NS-2 at the end of the other eects, but the
example setup may be more eective.
Tuner
Delay type eector
Eector
AMP
Keyboard
Guitar
Bass
* Do not connect delay or reverb eects
between the Send and Return. Connect
them between the NS-2 and an amplier.
2. Set the controls on the panel as
shown below.
3. Push the pedal switch and make sure the
check indicator lights up.
* When the check indicator is lit, noise reduction is on and when it is
dark, normal.
4. Turn on the eect device to be used,
then set the threshold knob so that the
reduction indicator will light while not
playing and the noise will not be natural.
* Try making the decay toward the end sound natural.
5. Normally, set the DECAY knob to the MIN
position, but if the sound does not fade out
naturally, rotate it clockwise.
6. Set the mode selector switch to reduction or
mute.
* REDUCTION position allows you to select Normal or
reduction, and the MUTE position allows you to keep
reduction on use Mute occasionally.
AC Adaptor
5
Connect the AC adaptor to the DC IN jack on the unit rst, then to
the socket.
5
When the unit is not in use, disconnect the AC adaptor from the
socket.
Use of Battery
5
A battery was installed in the unit before it left the factory. The life
of this battery may be limited, however, since its primary purpose
was to enable testing.
5
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).
5
If the battery voltage drops (the Check/Mute indicator becomes
dimmer), various symptoms are shown, such as the eect
becomes weak, no sound is produced, etc. To prevent that, replace
the battery immediately.
5
Batteries should always be installed or replaced before connecting
any other devices. This way, you can prevent malfunction and
damage.
Changing the Battery
1. Hold down the
pedal and loosen
the thumbscrew,
then open the
pedal upward.
* The pedal can be
opened without
detaching the
thumbscrew
completely.
2. Remove the 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.
Main Specications
Nominal Input Level -20 dBu
Input Impedance 1 MΩ
Nominal Output
Level
-20 dBu
Output Impedance 1 kΩ
Recommended Load
Impedance
10 kΩ or greater
Power Supply Carbon-zinc battery (9 V, 6F22) or
Alkaline battery (9 V, 6LR61)
AC adaptor (PSA series: sold separately)
Current Draw 25 mA
* Expected battery life under continuous use:
Carbon: 11 hours
Alkaline: 24.5 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 415 g / 15 oz (including battery)
Accessories Leaet (“USING THE UNIT SAFELY,” “IMPORTANT
NOTES,” and “Information”)
Carbon-zinc battery (9 V, 6F22)
Options
(sold separately)
AC adaptor (PSA-series)
Parallel DC Cord: PCS-20A
* 0 dBu = 0.775 Vrms
* This document explains the specications of the product at the
time that the document was issued. For the latest information,
refer to the Roland website.
Thumbscrew
Battery Housing
Pedal
Spring Base
Coil Spring
Guide Bush
Hole
Battery Snap
Cord
Battery
Snap
9 V Battery
* To prevent malfunction and equipment failure, always turn down the volume, and turn o all the units before making any
connections.
* 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.
DECAY knob
This sets the time needed for the sound to fade out when the input signal
becomes lower than the set threshold level.
Rotating it clockwise makes the decay time longer. Normally, set this to the MIN
position.
MODE selector switch
This selects the reduction or mute mode.
CHECK/MUTE
Indicator
MODE
Dark (OFF) Light (ON)
REDUCTION Normal Reduction
MUTE Reduction Mute on
AC Adaptor
(PSA series; sold separately)
Parallel DC Cord
(PCS-20A: optional)
Owner’s Manual
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.
DC IN 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 from the AC adaptor.
INPUT jack
This jack accepts input signals (coming from a guitar, some other 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.
WARNING
Connect only specied devices to DC OUT jack
Connect only the specied device (PCS-20A) to the DC
OUT jack (which provide a supply of power).
© 2016 Roland Corporation
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