Kick bass directly to Pioneer P5530MP?

At the moment a Canton 2.16 system is working with me, but the music plays mostly in the footroom. Therefore the consideration: * Koax for mid and high sound into the dashboard * Kick basses into the doors. I stumbled over the Phonocar 2/584 bundle – but unfortunately »only« tweeters and just the kick basses. However, the opinions on the Phonocars could quite captivate me… Well then: Tuner is a Pioneer P5530MP (4×50 Watt DIN – whatever), final stage unfortunately does not blow away from the place. * Koax by ? and with it * Phonocar 2/737 or 2/735 in the doors Or rather a * Phonocar 2/828 and finished? The tweeters of the Canton QS 2.16 are also quite “bissig”… TIA for suggestions, Martin