DAB + Digital Radio. CAR AUDIO FITTING PARTS. DAB / Digital Radio. Double Din Facias / Kits. Single Din Facias / Kits. Steering / Stalk Adaptors. CAR SECURITY / PARKING SENSORS. Dashboard Camera / DVR. Exhaust Trims / Ends. Ford ST / RS Parts. Fiesta 1.0 Ecoboost. Focus 1.0/1.6 Ecoboost. IN CAR SAT NAV. INDUCTION KITS / AIR FILTERS. Gauges / Push Buttons. HID Kits / Performance Bulbs. R8 / Devil Eye / DRL Headlight. Side Repeaters / Indicators. Roof Bar / Racks. Lowering Shock & Spring Kits. Wheel Nuts Bolts / Spigot Ring. If you do not see what you want please call as we are adding new items every day. Audison Prima APBMW S8-4 BMW Underseat Subwoofer Upgrade – 4OHM Version! Please note you only get ONE. Huge bass from these standard under seat positions is usual, beautifully balanced musical bass has always been much harder to achieve until now. Audison cast a magic spell on this trickiest of upgrade solutions with this superb under seat subwoofer. Physically designed to drop into the original BMW enclosure this plug and play fix for dreadful BMW bass is quick and easy for your installer to fit too. Price is for a Single Woofer. Technical Specification Size mm in. : 48 (1.89) x 18 (0.71) x 7 (0.28) Weight of one speaker kg lb. : 1.21 (2.67) Voice Coil Ø mm in. Sorry we do not accept American Express. We specifically disclaim any implied warranties of title, merchantability, fitness for a particular purpose and non-infringement. Customers should satisfy themselves that any item choice made is suitable for their intended purpose or use. We cannot be held responsible if the product is not suitable for use outside the UK. Add to Favourite Sellers. Sign up to Newsletter. View more great items. Audison Prima APBMW S8-2 BMW Underseat Subwoofer Upgrade – 2OHM Version! Audison APBX 8 R – 8 Ported Subwoofer Enclosure PASSIVE 250w RMS 500W Peak. Audison APBX 8 DS – 8 Bass Subwoofer Enclosure PASSIVE 250w RMS 500W Peak. Audison APBX 10 DS – 10 Bass Subwoofer Enclosure PASSIVE 400w RMS 800W Peak. This listing is currently undergoing maintenance, we apologise for any inconvenience caused.