The engine went from 1500 rpm to 1300 rpm when i crank the volume up...I hoped that capacitors would fix that but I think they are not big enough (3fahrad together)
And i'm afraid the front window will be loose after a while, it vibrate quite heavily.
Haven't been on db drag yet, but i suppose around 140-141 desibel
Practicality? well, civic has a good solution for the backseat, just bring them up and you get a quite big "trunk" Have to offer something for sound
