Hi…. Build a nice small system with my brother As the final stages there are 2 Helix HXA 400 MK II. The front system is composed of a 16 Coax of Helix… In the back come into the door 13er of Helix…. In case of Woofern we can not decide…. In closer selection are Emphaser X-Treme , Neo V2 or Kicker CVR12 as 12 inches version,….the kickers are once with 2×4 and 2×2 ohm….The case should be installed with 2 pieces. mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mfg Tom mf?