The SDD3 is a 2 channel full range stereo audio delay line, with one dedicated channel subwoofer delay line. Full range channels are specifically for delaying audio signals for main PA systems or side fills,with a maximum delay time of 393,216ms (approx 134m / 442ft).Each channel is equipped with a tunable high pass filter for easy side fills setup. The full range channels use super digital technology with wide bandwidth and enhanced dynamic range. For optimal analog to digital converter driving, the full range channels are equipped with ADC sensitivity control, which increases input level and reduces output level at the same time, so the level pass in the SDD3 does not change when adjusting the ADC sensitivity. The input level can be seen on the level meters. Output level can be set in the range from -10 to +10dB.