The processing power of your filter is given in number of biquads. What can a biquad do?
One biquad can do either a PEQ, Notch Filter, 1.order High-Pass Shelving Filter, 1.order Low-Pass Shelving Filter, 2.order High-Pass Filter, 2.order Low-Pass Filter or one All-Pass. E.g. DCN23 could do 4.order High-Pass filter + 4.order Low-Pass filter + one Notch filter + 11 x PEQ in one channel equal 16 biquads. Try it out for your self: XOW.zip. You can see how many free biquads is left for extra processing in each channel just above the Driver Box.