I installed 2 kicker 4ohm cs speakers in front doors. They have power but no sound. I can hear very low audio, and bass. This is the same problem I had with the front door speaker which prompted me to change them. Now same issue occurs when I tried putting the OEM speakers back. I tried using vehicle adapter, as well as the wires that came with the speakers and same thing. I am thinking of trying to install then in the rear doors to see what happens, but unsure if it will cause the same issue like it did to the passenger door. Vehicle is a 2015 sonata with OEM amplifier. Any idea what this could be?