Hi, Recently i have changed From OEM music system to Pioneer DEH-1590 UB and changed the Speakers to RockfordFosgate front it is co-axial and Rear it is Component.I am facing Jarring from rear speaker and low quality in output sound. Can anybody suggest the better solution from below order which is economical. 1.Changing the speaker position from door to the rear parcel tray. 2.Adding the Bass Blocker. 3.Adding new Amplifier. 4.Installing noise-dampening products. if any Expert sound installing person help is required please give me the address of the shop in bangalore. Note to moderators if any thread existing on same topic please feel to merge it.