ALPINE S2-Series 8" Dual Voice Coil Subwoofer - S2-W8D4 shipping-29.99 A unique ventilation system keeps

A unique ventilation system keeps the voice coil cool

the ISUB BMW 4 integrates directly into the factory subwoofer locations while maintaining the original appearance of the vehicle

Impressive audio control is also available by using the Auto Time Alignment function

sensitivity: 88 dB

ALPINE S2-Series 8" Dual Voice Coil Subwoofer - S2-W8D4 shipping-29.99 A unique ventilation system keepsALPINE S2 SERIES 8" DUAL VOICE COIL SUBWOOFER S2 W8D4 Enhance your sound systems performance with the remarkable S Series S2 W8D4 8 Subwoofer. This exceptional subwoofer has undergone a complete redesign, resulting in a product that delivers a level of bass power and reliability that was once reserved for higher priced models. This subwoofers standout feature is its formidable 8 inch driver, meticulously crafted to generate an astounding amount of air