This is a 2014 Honda Accord that we recently upgraded. We kept the factory navigation radio and installed a DSP with 3 amplifiers. In the doors we build composite speaker adapters for a set of Focal Utopia 2 way speakers and modified the sail pilar for the new Utopia Be Tweeter. For subwoofers we did 2 Digital Designs SW series 6.5" subs ported in the floor with the amplifiers. Sounded amazing. In the floor and the foot wells we also installed a multicolor light kit from Racesport for some cosmetic appeal. Came out real nice and he still retained full use of the trunk. Enjoy