The Vibe OPTISOUNDBMW8-V4 is a plug and play underseat subwoofer designed as a direct replacement for select BMW models using car-specific baskets and harnesses for straightforward installation and improved low-frequency performance compared to factory speakers.

The driver is a one-way 8 inch design with a high-end crossover set to a reference curve and can be used as a passive or semi-active system. Approved fitment includes BMW 1 Series E82 E87 E88 and 3 Series E90 E91 E92 E93. Recommended amplifier is POWERBOX60.4-V7.