TheWarrior, yes I realize I will need to get a mic, learn how to use REW, measure, adjust DSP on the amp etc.
I am reaching the same conclusion as above - the DIY route seems very worthy esp if you build multiple subs since the same amp can be used and cost of materials goes down too. But for a single sub, for someone living in an apartment like me, with no tools, it seems a lot of work even if I use a flatpack which contains precut wood panels. Things like soldering wires, adding the rear connectors, paint/finish etc.
I wish PartsExpress had ported sub kits, they only have sealed.
I also think the big ID subs like PSA/SVS now include digital amps with some sort of DSP built in, I'm sure it can be matched by the iNuke but again it then becomes a learning experience and not really a way to save money.