Noob question here: Can i decrease the lower frequencies in my head unit and increase them in my (active) subwoofer? The idea is that my regular door speakers don't play these lower frequencies since they sound awful on higher volumes. So basically i want only my subwoofer to play low tones and the regular speakers the mids and highs
Your idea will work and it's the cheapest, but you will lose quality because using more gain on sub you also amplify noise. Be careful and don't go to extremes, too much noise can damage your sub. Best solution is to use hi pass filters or crossovers for your speakers or replace the speakers
You can set it by turning your bass all the way out. And then turn your volume ¾ way up and set your amp gain towards middle. Higher if you have aftermarket speakers. (But not to the highest)
Question o need help i installed a rca and when i did and connected everything right my sub i turn gain all the way up but only bump very little then turned up the bass boost it hitting but whay shpuld i do leave it