BOSS NS-2 Noise Suppressor Owner’s Manual

NS-2 Noise Suppressor
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.

Main Features

• The BOSS NS-2 is a completely new type noise suppressor that features the SEND and RETURN jacks.
• 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.
• 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.
• The NS-2 works as a noise-gate unit, cutting the noise and hum that occur between song intervals or at break.
• You can use the Pedal Switch effectively as a mute-switch when tuning or changing guitars, as for a Normal/Effect switch.
• The 9 V DC OUT jack is provided it connect to the optional Parallel DC Cord (PCS-20A) for supplying power to the other 9 V effect units.

Panel Descriptions

• 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.

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. 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

• Connect the AC adaptor to the DC IN jack on the unit first, then to the socket.
• When the unit is not in use, disconnect the AC adaptor from the socket.

Use of Battery

• 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.
• 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).
• 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.
• 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 Specifications

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 figures 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| Leaflet (“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 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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