Looks to me like they are REAL cheap. I can identify a lot of car audio subs, and that is one I have not seen before. They are definitely $10-$20 flea market woofers.
I can tell you all the Brands they are not:
JL Audio, Alpine, Eclipse, Kenwood, Pyle, Lanzar, Pioneer, MTX, SPL, Audiobahn, Power Acoustik, Digital Audio, X site, Kole, Audiopipe, JVC, Visonik, MA Audio, DUB, Fusion, Clif Designs, Alphasonic, Blitz, Hi-Fonics, Jensen, Sound Storm, Ultra Linear, Legacy, Cyclone Audio, Pyramid, Volfenhag, Rockwood, Rockford Fosgate, DHD, Phoeinx Gold, Phoenix Digital, Reactor, AudioFonics, American Pro, Dual, Soundstream, Adire Audio, Treo, Digital Designs, Image Dynamics, Crossfire or Audiovox.
Did I mention I have catalogs to cross reference.