Sure you could run through a head unit. That's the easy way to go. Just stash it somewhere. (As long as the head unit allows hand control of the iPad/iPod).
iPhone 5s (iTunes library/iTunes radio/Waze, etc) to Airport Express via AirPlay to Tru Technology SSLD6i via aux out of Airport Express to Helix A4S Competition. Dynaudio MD102, Esotar 1200, and MW152. Jehnert Door Cards and mid-bass'.