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The DNS 4 is ideal for users who require more than two channels of DNS in a portable rather than a rackmount package. It’s suitable for use in all situations – location recording, live-to-air broadcasting and live sound in venues such as theatres, concert halls, conferences venues and places of worship, as well as in the studio.


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The DNS 4 is the most advanced portable model in the DNS series. With its Hirose HR-10 power input and mini-XLRs for many connections, it takes up little more space than the industry-standard DNS 2 yet doubles the number of channels available.

It’s incredibly fast and simple to use; the DNS algorithm requires nothing more than switching on the Learn function that identifies and adapts to the background noise, and then adjusting the amount of noise attenuation required. Notwithstanding this simplicity, it can achieve remarkable results. What’s more, despite being so convenient that you can slip it into your pocket or equipment bag, it offers analogue line and ultra low-noise microphone inputs (the latter with optional 48V phantom powering), AES3/AES11 digital inputs, and both analogue and digital outputs. And, to increase its flexibility still further, it runs on 12V power so you can use it in the middle of a field as easily as in the studio or edit suite.

Retaining the near-zero latency of its predecessors, the DNS 4 is suitable for use in all situations – location recording, live-to-air broadcasting and live sound in venues such as theatres and concert halls, conference venues and places of worship, as well as in the studio.

The dialogue noise suppressors that everyone uses everywhere

CEDAR’s dialogue noise suppression (DNS) technology is used on the highest quality productions and broadcasts to eliminate traffic noise, air conditioning, wind, rain, babble and general background noise from audio. It will help to compensate for unfavourable acoustic conditions and poor microphone placement, and will even suppress excessive reverberation.

It’s used to clean up sound for film production, to suppress ambient noise for live broadcasting, to refresh sound libraries, and to enhance speech for audio forensic investigations. It’s an industry standard that has earned a string of awards including an Emmy®, an Academy Award®, an IABM Award® and two Cinema Audio Society Awards.

CEDAR DNS4 Left Panel
CEDAR DNS4 Right Panel

Key features of the DNS 4

  • Four channels of state-of-the-art noise suppression
  • High-resolution 40-bit floating-point processing
  • Near-zero latency to ensure that there’s no loss of lip-sync
  • Super-fast setup and control
  • It’s small, light and eminently portable
  • It runs on 12V power

Line inputs

    • Connectors:
      – Channels 1&2: Balanced XLR3F
      – Channels 3&4: Balanced TA3 mini-XLR
    • Impedance: 10kΩ
    • Nominal signal level (0dB gain): +4dBu
    • ADC line up (0dB gain): +4dBu : -20dBFS
    • Clipping level (0dB gain): +24dBu
    • Dynamic range (0dB gain): >102dB (AES17 unweighted)
    • Gain ranges:
      – Channels 1&2: -6dB to +54dB
      – Channels 3&4: 0dB to +20dB

Microphone inputs with ultra low-noise microphone preamplifiers

  • Connector: Balanced XLR3F
  • Impedance: 2kΩ
  • Gain range: 18dB to 78dB
  • ADC line up (36dB gain): -32dBu : -20dBFS
  • Dynamic range (36dB gain): >102dB (AES17 unweighted)

Phantom Power

  • Type: P48 (IEC61958)
  • Unloaded voltage: +48V ± 4V
  • Current available: 10mA per microphone
  • Short circuit protection: Indefinite

AD/DA conversion

  • Format: 24-bit linear PCM
  • Sample rate (internal sync.): 48kHz
  • Sample rate (external sync.): 40kHz – 100kHz

Digital inputs

  • Connector: Balanced TA3 mini-XLR
  • Format: AES3 (IEC60958) or AES11 (DARS)
  • Sample rate sync range: 40kHz – 100kHz

Line outputs

  • Connector: Balanced TA3 mini-XLR
  • Nominal signal level: +4dBu
  • DAC line up: -20dBFS : +4dBu
  • Maximum output: +24dBu
  • Dynamic range: 96dB
  • Minimum load impedance: 600Ω
  • Short circuit protection: Indefinite

Digital outputs

  • Connector: Balanced TA3 mini-XLR
  • Format: AES3 (IEC60958)
  • Sample rate (internal sync): 48kHz (±50ppm)
  • Sample rate (external sync): locked to digital input


  • Type: Floating point
  • Resolution: 40-bit
  • Sample rates: 44.1kHz, 48kHz, 96kHz

Power input

  • Voltage: 8V to 17.5V (nominal 12V)
  • Connector: Hirose 4-pin HR10 (pin1 -, pin4 +)
  • Reverse polarity protection: Indefinite
  • Over-voltage protection: Indefinite, up to 50V
  • Max power consumption @ 12V: 15W

Power adapter

  • Input voltage: 85VAC – 260VAC, 50 – 60Hz
  • Input power: 15W
  • Input connector: UK/US/EU
  • Output voltage: 12V
  • Output connector: Hirose 4-pin HR10 (pin1 -, pin4 +)


  • Dimensions: 185 x 130 x 45 mm
  • Weight: 750g