Thanks to the invaluable Mwillems' tutorial and his kind answers to my previous questions, I have successfully tuned under Windows my entirely JRiver-based 4 way active speakers.
MC is the best software for digital music lovers and particularly for enthusiast DIY audiophiles and this forum a treasure trove.
I have read one more time the above mentioned guide, but I didn't find any reference to my question, i.e. if, similarly to the Windows version of MC, in the Mac version too is possible add, through 3rd party software, a second convolution (used by me for DRC). Under Seven I use for DRC filters, VST convolver loaded before the JRiver integrated convolver managing the XO FIR filters.
Many many thanks for patience and attention.