Roundover MartySubs v2.0 21" Flat Packs

  • All the Performance of MartySubs, now with a truly Professional Appearance!
  • MartySub v2 "Roundover Series" are distinguished from classic MartySubs in that they feature: (i) a fully rounded over baffle (around the perimeter, around the driver, and around the port), (ii) completely new internals for a super precision fit including flush seamlines, and (iii) a supplementary driver mounting ring.
  • In order to ensure a flush fit, the Roundover Series requires quite a bit of additional machining time and somewhat more MDF. This makes them more expensive to manufacture than classic MartySubs and this is reflected in their pricing.
  • With our latest creation, we have endeavored to provide you with a subwoofer cabinet that can rival some of the best commercial subs for appearance; we look forward to seeing how creative you can get! 



One of our customers, Jiles of the YouTube Channel JDM World, created an amazing step-by-step video of his Roundover MartyCube V2 build experience. He loaded it with the Eminence Tour Grade 18" pro audio woofer and called his build the Annihilator. Thanks again Jiles!! Fantastic work!!

Note: While the build video is for the 18" version, the build process is the same for the 21" version.  



  • MartySub Roundover Series include a new baffle design--three layers thick!
  • An inner driver mounting ring is attached to the baffle with eight 1/2" dowel pins, providing added rigidity and minimizing (to near zero) the chances of stripping a screw hole while attaching the driver.