Phoenix Gold Z12D4 Z Series 12 Inch Sub Dual 4 Ohm Subwoofer 400w RMSZ12D4 12 1600W Dual 4 Ohm Subwoofer The Z12D4 is a 12 inch 1600Watt Dual 4 Ohm Subwoofer designed to give high performance bass and an amazing sound. Where most entry line woofers feature 1. 5 voice coils, Phoenix Golds Z Series subwoofers feature long wound 2. 0 high temp copper voice coils which allows for 40mm of peak to peak excursion. This results in an ability to create deep, accurate bass in vented or sealed enclosures. With a mounting depth of