The 4 Series processing platform has been designed to operate at a native sampling rate of 96kHz, and also be powerful enough to cope with the additional inputs and outputs. Available on each input channel is a 28-band graphic equaliser, in addition to 8 bands of fully parametric equalisation. Each output path features each gain control, polarity, delay and up to 9 parametric sections, in addition to the crossover filters which offer slopes from 6dB/Octave up to 48dB/Octave. All parametric sections can be re-configured to many alternate filter behaviours, including the familiar high and low shelves and notch filters, along with bandpass, elliptic & variable ‘Q’ shapes, and phase adjustment, in 2 degree steps. Each output also features a combination of limiters - a limiter which is designed to protect individual drivers from over-excursion/over-driving, and an additional look-ahead “D-Max” limiter for added safety.