Equalizer, Crossover, Line Drivers?? What are they??

[RbAudio_Geek 10+ year member]

This is my system i got Duel Kicker S12L7's, a Alpine CDA-9847, a Rockford 1501bd or MTX 1501D (havnet bought or decied which one yet). I was wondering if i would need a Equalizer, Crossover, or a Line Driver (what ever that is) i want to best sound quality form my system possible. What are those and what do they do? If i need one waht moble will work well with what i got?

Thank you.

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[jujumantb 10+ year member]

What are you running for speakers up front? If your answer is "stock crap", then you dont need any of those things. The only one you *might* think of getting is an EQ, but that would be stupid to get a nice EQ for just bass frequencies while your stock fronts have no chance at sounding good to begin with. You amp/amps will have crossovers on them and a line driver simply boosts the signal voltage for a cleaner signal if you happen to have a dirty one, you dont one.