Unknown Transducer from Digital Designs (DD Audio) - who know the Model Number ??

[tiefbassuebertr]

In the attachment a pic of that car hifi bass driver. About the URLs

DD Audio: Mobile Audio | Woofers | Z Series | DD Audio
CarHIFI-Zone.de :: Digital Designs
Digital Designs - CarAUDIO-Store.de - CarHifi Versand Online Shop: Car Hifi Online-Shop CarAUDIO, Hifi, Store, online, versand, katalog, bestellen CarHifi, Lautsprecher, Subwoofer, Navigation, Verstärker AutoHifi Online Bestellen CarAUDIO-Store.de -
http://www.carhifishop.at/bilder/produkte/gross/DigitalDesignsDDZ1818Subwoofer.png
http://www.carhifi-zone.de/images/products/digital_1012a.jpg
http://www.poppi-electronic.de/DD91121.jpg
Digital Designs
http://www.carhifi-zone.de/images/products/dd_z15b.jpg

I don't find the version from the attached image.