Boss Ns-2 Noise Suppressor Owner's Manual

NS-2 Noise Suppressor

Product Information:

• Main Features:
  • – The unit has a 9 V DC OUT jack for connecting a PCS-20A
    parallel DC cord (optional) to supply power to effects processors
    and other PSA adaptor-compatible gear. However, power cannot be
    supplied from the DC OUT jack when the NS-2 is running on
    batteries.
  • – The unit has a DC IN jack for accepting 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.
• Panel Descriptions:
  • – REDUCTION indicator: This indicator is lit when the noise
    reduction function is being engaged.
  • – THRESHOLD knob: This sets the threshold level where the noise
    suppression starts working. Adjust it depending on the signal level
    and noise level.
  • – CHECK/MUTE indicator: This indicator lights when the effect
    (Noise reduction or Mute) is on. It also serves as a battery
    check.
  • – OUTPUT jack: Used to connect the unit to amplifiers or other
    devices.
  • – DECAY knob: Sets the time needed for the sound to fade out
    when the input signal becomes lower than the set threshold
    level.
  • – SEND jack: Sends the input signal to external effect
    devices.
  • – Pedal Switch: Pressing the pedal controls the effect ON/OFF
    (Normal/Reduction in the Reduction mode and Reduction/Mute in the
    Mute mode).
  • – MODE selector switch: Selects the reduction or mute
    mode.
  • – CHECK/MUTE Indicator MODE:
    • – Dark (OFF): Indicates Normal Reduction.
    • – Light (ON): Indicates Reduction Mute on.
  • – Thumbscrew: Loosen this screw to open the pedal and change
    the battery.
  • – RETURN jack: Where the signals from the effect units are
    returned.

Product Usage Instructions:

1. Before using this unit, carefully read the sections entitled
   “USING THE UNIT SAFELY” and “IMPORTANT NOTES” (supplied on a
   separate sheet). Keep the document(s) where it will be available
   for immediate reference.
2. To supply power to effects processors and other PSA
   adaptor-compatible gear using an AC adapter, connect a PCS-20A
   parallel DC cord (optional) to the 9 V DC OUT jack. Note that power
   cannot be supplied from the DC OUT jack when the NS-2 is running on
   batteries. Ensure that the total current consumption of all devices
   (including the NS-2) does not exceed the maximum output current of
   the PSA series unit being used.
3. Connect an AC Adaptor (PSA series; sold separately) to the DC
   IN jack to power the unit without relying on batteries. It is
   recommended to keep batteries installed in the unit even when using
   the AC adaptor to ensure uninterrupted performance in case the
   adaptor cord gets accidentally disconnected.
4. The REDUCTION indicator lights up when the noise reduction
   function is engaged.
5. Adjust the THRESHOLD knob to set the threshold level where the
   noise suppression starts working. The knob should be adjusted based
   on the signal level and noise level. Turn it counterclockwise when
   the threshold level is too low.
6. The CHECK/MUTE indicator lights up when the effect (Noise
   reduction or Mute) is on. It also serves as a battery check. If the
   indicator goes dim or no longer lights up while an effect is ON,
   replace the battery immediately.
7. Use the OUTPUT jack to connect the unit to amplifiers or other
   devices.
8. The DECAY knob sets the time needed for the sound to fade out
   when the input signal becomes lower than the set threshold level.
   Rotate it clockwise to increase the decay time. The MIN position is
   the default setting.
9. The SEND jack sends the input signal to external effect
   devices.
10. Press the Pedal Switch to control the effect ON/OFF. In
    Reduction mode, it switches between Normal and Reduction, while in
    Mute mode, it switches between Reduction and Mute.
11. Use the MODE selector switch to choose between the reduction or
    mute mode.
12. The CHECK/MUTE Indicator MODE displays the selected mode. When
    it is dark (OFF), it indicates Normal Reduction, and when it is
    light (ON), it indicates Reduction Mute.
13. To change the battery, loosen the Thumbscrew to open the
    pedal.
14. The RETURN jack is used for signals from the effect units to be
    returned.

Owner’s Manual

English

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.

Main Features
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 effect unit connected between the SEND and RETURN. This makes it possible to reduce the noise of each effect unit whether it is turned on or off. 7 Different 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 effect 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 effectively as a mute-switch when tuning or changing guitars, as for a Normal/Effect 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 effect units.

Panel Descriptions

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 effects 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.

Parallel DC Cord

(PCS-20A: optional)

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.

AC Adaptor (PSA series; sold separately)

* 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 specified AC adaptor (PSA-series).
* If the AC adaptor is connected while power is on, the power supply is drawn from the AC adaptor.

REDUCTION indicator
This indicator os lit when the noise reduction function is being engaged.
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.

CHECK/MUTE indicator
This indicator lights when the effect (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 effect is ON, the battery is near exhaustion and should be replaced immediately.
* The CHECK indicator shows whether the effect is on or off, and indicates the different functions. It does not indicate whether the power to the device is on or not.

OUTPUT jack
The output jack is used to connect the unit to amplifiers or other devices.

Guitar Amplifier

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.

SEND jack
Through this jack, the input signal is sent to external effect devices.
Pedal Switch
By pressing the pedal, effect ON/OFF (Normal/Reduction in the Reduction mode and Reduction/Mute in the Mute mode) can be controlled.

MODE selector switch
This selects the reduction or mute mode.

CHECK/MUTE Indicator
MODE
REDUCTION MUTE

Dark (OFF)
Normal Reduction

Light (ON)
Reduction Mute on

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 effect units are returned.

* To prevent malfunction and equipment failure, always turn down the volume, and turn off all the units before making any connections.
* Before turning the unit on/off, always be sure to turn the volume down. Even with the volume turned down, you might hear some sound when switching the unit on/off. However, this is normal and does not indicate a malfunction.

INPUT jack
This jack accepts input signals (coming from a guitar, some other musical instrument, or another effects unit).

Electric Guitar

* 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 off when the cable is unplugged. To prevent unnecessary battery consumption, be sure to disconnect the plug from the INPUT jack when not using the effects unit.

Operating the Unit

1. Make all the necessary connections.
* You can also set up the NS-2 at the end of the other effects, but the example setup may be more effective.

AMP Delay type effector

Bass Guitar

Effector

Keyboard

Tuner

* Do not connect delay or reverb effects between the Send and Return. Connect them between the NS-2 and an amplifier.

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 effect 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 first, 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 fluid 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 effect 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 Thumbscrew pedal and loosen

the thumbscrew,

then open the pedal upward.

Battery Snap Cord

Pedal Spring Base Coil Spring

* The pedal can be opened without detaching the thumbscrew completely.

Battery Snap

Guide Bush Hole
Battery Housing

2. Remove the old

9 V Battery

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 Specifications

Nominal Input Level -20 dBu Input Impedance 1 M

Nominal Output Level

-20 dBu

Output Impedance 1 k

Recommended Load Impedance

10 k 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

Dimensions Weight

* Expected battery life under continuous use: Carbon: 11 hours Alkaline: 24.5 hours These figures will vary depending on the actual conditions of use.
73 (W) x 129 (D) x 59 (H) mm
2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches
415 g / 15 oz (including battery)

Accessories
Options
(sold separately)

Leaflet (“USING THE UNIT SAFELY,””IMPORTANT NOTES,” and “Information”) Carbon-zinc battery (9 V, 6F22)
AC adaptor (PSA-series) Parallel DC Cord: PCS-20A

* 0 dBu = 0.775 Vrms
* This document explains the specifications of the product at the time that the document was issued. For the latest information, refer to the Roland website.

WARNING
Connect only specified devices to DC OUT jack
Connect only the specified device (PCS-20A) to the DC OUT jack (which provide a supply of power).

© 2016 Roland Corporation

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