CT SOUNDS 6.5 Inch Car Subwoofer – Dual 2 Ohm Impedance, 400W Maximum Power Capacity, 1.6” Voice Coil High Frequency Subs with Rubber Edge for Vehicle Stereo Sound System - Meso 6.5 D2 : Amazon.com.au: Electronics
Subwoofer Wiring 101 Pt. 2 | How to Wire Two Dual Voice Coil Subwoofer in Series and in Parallel - YouTube