Vibe OPTISOUND BMW 8 Underseat Subwoofers pair for BMW. VIBE OPTISOUND 8 inch BMW Underseat Subwoofer. BEST INTEGRATION – Designed and engineered to fit perfectly into your vehicle with no damage or modifications. ENHANCED TECHNOLOGY – New alloy dampening ring surrounds the premium Neodymium motor to stop outward waste of gauss from the high power magnet. BEST FITMENT – Our BMW underseat subwoofers will fit 95% of BMW models from the year 2005 onwards! No messing, fast and easy installation. PREMIUM BUILD – In order to integrate into premium vehicles we supply premium products, with high quality parts such as Neodymium motors, pressed foam surrounds, gold plated terminals and steel torsion baskets, Our BMW subwoofers far exceed the OEM speakers.