What’s up everyone, hey I need some help here .im new to car audio and this is what I have an what I may need to complete my system. I have 2 Focal 130 140 AS 5 1:4, I’m the front doors and crossover with tweeter and 2 Focal 130 AC 5 1/4: I have to buy this Ap4-FD21 amplifier Integration interface so I can still use my sync system with my 2014 F150 Lariat. My question is can I use a 4 channel app and not push my sub or should I get a 5 channel amp and push them all? I’m into Rock music and not the bass but I don’t want it to sound like s’’t either? I appreciate your information. Tightlines boy! Fish on!