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The NS-2 can be connected in two different ways. You can connect the NS-2 last in your chain of effects. The output of the previous pedal goes to the NS-2 input jack. Wire the Output jack of the NS-2 to your amp. The NS-2 can also be wired like an effects loop, which allows you to kill your entire signal chain just by stomping on the NS-2. Take the Send output of the NS-2 into your first pedal. Take the output of your last pedal and wire it to the Return jack of the NS-2.

Boss NS-2 Noise Suppressor

The NS-2 uses an intelligent circuit to differentiate between the sound of the guitar and noise. The NF-1 simply cut all sound when it became weaker than a threshold value. The NS-2 attempts to let the sound of the guitar through while removing the noise. The NS-2 production moved to Taiwan December 1989.


  • Controls: Threshold, Decay, 2-way Mode Switch
  • Connectors: Input, Output, Return, Send, 9V DC In, 9V DC Out
  • Current Draw: 20 mA (DC 9V)
  • Weight: 400 g (15 oz.)
  • Recommended AC Adaptor: PSA Series


  • Silver – Made In Japan
  • Silver – Made In Taiwan

The NS-2 was sold from September 1987 to present.