ALPINE R Series 8" Subwoofer Box ( Ported ) - SBR-S8D4.2 Wireless Navigation Receiver low-frequency version of our NexD2™

low-frequency version of our NexD2™ amplifier technology delivers rock-solid bass performance and fidelity

Item # 091ACX690  Features & specs

Note: touch operation differs among compatible smartphones

With a sleek new redesign and upgraded features from their predecessors

Trim Rings

ALPINE R Series 8" Subwoofer Box ( Ported ) - SBR-S8D4.2 Wireless Navigation Receiver low-frequency version of our NexD2™Award winning SBR S8D4, named INCAR SUBWOOFER OF THE YEAR LOADED ENCLOSURE for 2017. The SBR S8D4 features Alpines Type R 8 subwoofer in a custom slot ported enclosure. Ideal for installation in small spaces, its compact size means it can fit virtually anywhere. The pre installed subwoofer employs many features typically found in larger models, such as Alpines H. A. M. R (High Amplitude Multi Roll) suspension. This unique design allows greater linear