{"product_id":"match-up-w8bmw-s-ultraflat-8-bmw-upgrade-subwoofer-pair","title":"MATCH UP W8BMW-S Ultraflat 8\" BMW Upgrade Subwoofer Pair","description":"These ultra-flat subwoofers deliver punchy, dynamic bass thanks to an exceptionally rigid fiberglass cone that maximises sound pressure without distortion. BMW-specific baskets and connectors allow quick installation into the original under-seat positions across all BMW model ranges with factory subwoofers. An oversized 42.5 mm voice coil ensures high power handling, while the 1 x 2 Ohm single voice coil makes them a direct replacement for the original BMW Hi-Fi sound system subwoofers. They also work brilliantly in universal ultra-flat enclosures or paired with MATCH UPGRADE amplifiers like the UP 7BMW and UP 7DSP.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003ePower RMS \/ Max\u003c\/strong\u003e: 200 \/ 400 Watts\u003cbr\u003e\u003cstrong\u003eImpedance\u003c\/strong\u003e: 1 x 2 Ω\u003cbr\u003e\u003cstrong\u003eDC Resistance\u003c\/strong\u003e: 2.0 Ω\u003cbr\u003e\u003cstrong\u003eResonance Frequency\u003c\/strong\u003e: 49 Hz\u003cbr\u003e\u003cstrong\u003eMechanical Q Factor\u003c\/strong\u003e: 3.80\u003cbr\u003e\u003cstrong\u003eElectrical Q Factor\u003c\/strong\u003e: 0.61\u003cbr\u003e\u003cstrong\u003eTotal Q Factor\u003c\/strong\u003e: 0.53\u003cbr\u003e\u003cstrong\u003eCompliance\u003c\/strong\u003e: 210 µm\/N\u003cbr\u003e\u003cstrong\u003eEquivalent Air Volume\u003c\/strong\u003e: 13.9 L\u003cbr\u003e\u003cstrong\u003eForce Factor\u003c\/strong\u003e: 7.1 Tm\u003cbr\u003e\u003cstrong\u003eEfficiency 1 W \/ 1 m\u003c\/strong\u003e: 90 dB\u003cbr\u003e\u003cstrong\u003eCone Area\u003c\/strong\u003e: 214 cm²\u003cbr\u003e\u003cstrong\u003eMoving Mass\u003c\/strong\u003e: 47.4 g\u003cbr\u003e\u003cstrong\u003eCone Material\u003c\/strong\u003e: Extremely stiff fiberglass cone\u003cbr\u003e\u003cstrong\u003eMechanical Resistance\u003c\/strong\u003e: 3.97 kg\/s\u003cbr\u003e\u003cstrong\u003eVoice Coil Diameter\u003c\/strong\u003e: 42.5 mm\u003cbr\u003e\u003cstrong\u003eVoice Coil Winding Height\u003c\/strong\u003e: 12.5 mm\u003cbr\u003e\u003cstrong\u003eMax. Linear Excursion\u003c\/strong\u003e: +\/- 4.0 mm\u003cbr\u003e\u003cstrong\u003eOuter Diameter\u003c\/strong\u003e: 239 mm\u003cbr\u003e\u003cstrong\u003eInstallation Diameter\u003c\/strong\u003e: 175 mm\u003cbr\u003e\u003cstrong\u003eInstallation Depth\u003c\/strong\u003e: 40 mm\u003cbr\u003e\u003cstrong\u003eRecommended Sealed Box Net Volume\u003c\/strong\u003e: 3 L\u003cbr\u003e\u003cstrong\u003eRecommended Vented Box Net Volume (1 Sub)\u003c\/strong\u003e: 12 L\u003cbr\u003e\u003cstrong\u003eRecommended Vented Box Net Volume (2 Subs)\u003c\/strong\u003e: 24 L\u003cbr\u003e","brand":"MATCH","offers":[{"title":"Default Title","offer_id":53771998691665,"sku":"M130802","price":299.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1041\/2772\/5905\/files\/MATCH-UP-W8BMW-S_Pers_1280x940px_15-04-20.jpg?v=1778700337","url":"https:\/\/shoponyxac.co.uk\/products\/match-up-w8bmw-s-ultraflat-8-bmw-upgrade-subwoofer-pair","provider":"Onyx Auto Care","version":"1.0","type":"link"}