I have the same 2 amps with 4 subs just like that. Plus one more because, millercarbon. You already have a lot of EQ built into your Daytons. If you really want to double down with DSP the simplest is to connect the DSP to each amp. The DSP is equalizing bass response. It doesn't know which or where or how many speakers. It only knows frequency and volume. You could hook all 4 subs to one amp and use it. Same result each time because, same DSP.
The LOC you built with your 2 resistors is identical to mine. https://systems.audiogon.com/systems/8367
The LOC you built with your 2 resistors is identical to mine. https://systems.audiogon.com/systems/8367