What possibilities do I have, without original Honda accessories, to improve the audio system in the new Civic considerably? In the old VEi, of course, I had power amplifier, subwoofer and large speakers in the hat rack… But I don’t want to “bask” the new car. Does anyone know where audio cables are usually in the newer cars, possibly up to the trunk? Or is it worth simply replacing the speakers in the rear doors with better ones, in order to significantly more bass Who can help?