DB Drive Euphoria Xpert EX8NMB-CFV2 : 8 in. NEO Carbon Fiber MidBass (Sold As Single) Marine Stereos Alpine recommends using a 25

Alpine recommends using a 25 Hz subsonic filter for best results

The P400X4 is perfect for a 4-way full-range system or a 3-way system having a front stage with subwoofers on the rear channels

Traditional subwoofer terminals are mounted horizontally or vertically

About the Alpine SPV-10TW-WRA

Subwoofer enclosure loaded with one 10" S-Series subwoofer

DB Drive Euphoria Xpert EX8NMB-CFV2 : 8 in. NEO Carbon Fiber MidBass (Sold As Single) Marine Stereos Alpine recommends using a 25Features 2 (51 mm) Voice Coil Neodymium M Ring Magnet Assembly Optimized for High Output SQ Sound Systems Weather Resistant Carbon Fiber Cone with Rubber Surround Custom Aluminum Basket with Radial Venting Specifications Power Handling: 300 Watts Dynamic Wattage: 600 Watts Resonant Frequency (fs): 57. 62 Hz D. C. Voice Coil Resistance (Re): 3 Mechanical Quality Factor (Qms): 2. 81 Electrical Quality Factor (Qes): 0. 68 Total Quality Factor (Qts): 0.