CEDAR Audio DNS 4 - Four-Channel Dialogue Noise SuppressorThe 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