DPA3655QR: it is a 3 input x 6 output Speaker Processor.
The activity of the 3 inputs is displayed by rows of 6 level LEDs plus 1 clip LED, the activity of the 6 outputs is displayed by rows of 5 level LEDs plus 1 clip LED plus 1 Limiter LED.
The unit has 3 analog inputs, a stereo digital input, & 6 analog outputs.
Each input has 5 parametric filters & each output has 5 parametric filters.
All the input & output filters can be selected to be Bell, 1st/2nd Order Shelvings w/-3dB at cutting Freq., Symmetrical Shelving w/variable Q, HighPass/Low Pass w/variable Q, 1st/2nd Order, All Pass (90/180Deg.
Phase rotation at the cutting freq.), Bandpass & Notch.
The outputs X-Over section has Butterworth, Linkwitz/Reyleigh & Bessel filters up to 24dB/Oct or Custom selectable HighPass/Low Pass up to 24dB/Oct configurable by the user as cascade of IInd Order cells adjustable in Freq & Q.
On Outputs are available a RMS compressor w/selectable Ratio up to 32:1 & adjustable Soft/Hard Knee & an Output Peak Limiter w/THR in Vp or dB