Subwoofer Sundown Audio - Sundown Team Series 12

Magnet gap which is heavily vented.
Improved, best in its class high-velocity pole vent
Latest techonology high-velocity vented spacer ring frame
Aluminum Black 3 Inch voice coil for the best in class heat sink
High Temperature 4-Layer Aluminum Flat Wire Voice Coil (Made in USA)
Ultra-high temp. four-layer aluminum voice coil with flat wire (proudly made in the USA).

Large size Farafay Ring with magnet ID.
Terminals with spring mechanisim.
Specially crafted speaker with Tinsel leads (double XL lead size) to prevent blowout under wattage.
Patented v.2 Mega-Roll Surround Techonology. 
High strength, patented aluminum frame which is casted.
The speaker is optimized for small ported and band pass speakers.