Recoil LOCD Active 2-Channel Line Output Converter Driver 2-in-1, 10V Line Output Signal with Auto Sense Remote Turn-on

What DSP would you recommend? I am using a line driver off the RCA of the head unit to get a 2v ac output to the sub amp. I'm not looking for major volume, just more clarity on the speakers when the sub hits, this unit doesn't differentiate from the front RCA l/r and the actual speaker l/r. So any changes to the eq it affects the sub amp. If there is a dsp I can put in line with the line driver and bypass needing an amp to run the budget skar speakers that have a hpf would be fantastic 😊 This is the head unit I am using https://a.co/d/0irIPjnJ And this is the line driver I'm using https://a.co/d/0fJ8H2BO