Can You Hear Me Now? Best Head Units By Matthew Guy | Last updated: January 21, 2021 Several lifetimes ago, your author was the first person in his small town to install a good set of subwoofers, plunking them in the hatchback area of a rusting Ford. Aftermarket stereos had been around for ages, of course, but banging woofers? Not so much. All hands quickly followed suit, one-upping each other and generally infuriating the communityâs rapidly aging populace. Back then, it was easy to source an aftermarket head unit because all cars had either a DIN or Double DIN sized hole in the dash. Todayâs interior styling choices have put a knee in the groin of this accessory segment but there are still a few machines into which one can swap a good receiver.