u/princess_poi7561

Looking for an amp and dsp for our set up

We currently have a mini scoop cab with 18” driver / RMS 450W 900 MAX / 8 ohms
12” ported box with 12” RMS 250W 500 MAX/ 8ohms and a top flare with a compression driver.
Needing a suitable amp, is it correct that we are looking for 1 amp with two channels, 8ohm and wattage at least twice the amount of RMS?

Other thoughts:
Can we parallel wire the flare with the 12” box? in order to have the two channel out put.
Is a built in dsp ideal or is a separate one better?