{"product_id":"helix-k-10s-250mm-dual-voice-coil-subwoofer-84-5mm-depth","title":"HELIX K 10S 250mm Dual Voice Coil Subwoofer 84.5mm Depth","description":"The HELIX K 10S is a shallow 250mm subwoofer designed for compact enclosures, delivering powerful bass without compromise. Its ultra-stiff sandwich paper cone and high-excursion rubber surround handle amplifier power effortlessly, converting it into deep, precise low-end. The dual 2-ohm voice coil offers flexible wiring configurations to match your amplifier, while the rear-threaded magnet system allows bolting to the enclosure back wall to reduce cabinet resonance. This DIY-friendly package includes a protective grille, trim ring, and gold-plated terminal for a complete installation solution.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType\u003c\/strong\u003e: Single chassis subwoofer\u003cbr\u003e\u003cstrong\u003eDiameter\u003c\/strong\u003e: 250 mm\u003cbr\u003e\u003cstrong\u003eOuter Diameter\u003c\/strong\u003e: 262 mm\u003cbr\u003e\u003cstrong\u003eMounting Diameter\u003c\/strong\u003e: 229 mm\u003cbr\u003e\u003cstrong\u003eMounting Depth\u003c\/strong\u003e: 84.5 mm\u003cbr\u003e\u003cstrong\u003eImpedance\u003c\/strong\u003e: 2 x 2 Ohm\u003cbr\u003e\u003cstrong\u003eDC Resistance\u003c\/strong\u003e: 2 x 1.6 Ohm\u003cbr\u003e\u003cstrong\u003eRMS Power\u003c\/strong\u003e: 300 W\u003cbr\u003e\u003cstrong\u003eMax Power\u003c\/strong\u003e: 600 W\u003cbr\u003e\u003cstrong\u003eResonance Frequency\u003c\/strong\u003e: 34 Hz\u003cbr\u003e\u003cstrong\u003eMechanical Q Factor\u003c\/strong\u003e: 6.37\u003cbr\u003e\u003cstrong\u003eElectrical Q Factor\u003c\/strong\u003e: 0.49\u003cbr\u003e\u003cstrong\u003eTotal Q Factor\u003c\/strong\u003e: 0.45\u003cbr\u003e\u003cstrong\u003eCompliance\u003c\/strong\u003e: 198 μm\/N\u003cbr\u003e\u003cstrong\u003eEquivalent Volume\u003c\/strong\u003e: 34 L\u003cbr\u003e\u003cstrong\u003eForce Factor\u003c\/strong\u003e: 12.7 Tm\u003cbr\u003e\u003cstrong\u003eEfficiency 1W\/1m\u003c\/strong\u003e: 87.0 dB\u003cbr\u003e\u003cstrong\u003eCone Area\u003c\/strong\u003e: 353 cm²\u003cbr\u003e\u003cstrong\u003eMoving Mass\u003c\/strong\u003e: 112 g\u003cbr\u003e\u003cstrong\u003eCone Material\u003c\/strong\u003e: Sandwich paper\u003cbr\u003e\u003cstrong\u003eMechanical Resistance\u003c\/strong\u003e: 3.73 kg\/s\u003cbr\u003e\u003cstrong\u003eVoice Coil Diameter\u003c\/strong\u003e: 50.8 mm\u003cbr\u003e\u003cstrong\u003eVoice Coil Winding Width\u003c\/strong\u003e: 19 mm\u003cbr\u003e\u003cstrong\u003eMax Linear Excursion\u003c\/strong\u003e: +\/- 6.0 mm\u003cbr\u003e\u003cstrong\u003eSurround Material\u003c\/strong\u003e: Long-throw rubber\u003cbr\u003e\u003cstrong\u003eRecommended Sealed Box Volume\u003c\/strong\u003e: 14 L\u003cbr\u003e\u003cstrong\u003eSealed Box -3dB Frequency\u003c\/strong\u003e: 46 Hz\u003cbr\u003e\u003cstrong\u003eRecommended Bass Reflex Volume\u003c\/strong\u003e: 16 L\u003cbr\u003e\u003cstrong\u003eBass Reflex Port Diameter\u003c\/strong\u003e: 70 mm\u003cbr\u003e\u003cstrong\u003eBass Reflex Port Length\u003c\/strong\u003e: 38 cm\u003cbr\u003e\u003cstrong\u003eBass Reflex Tuning Frequency\u003c\/strong\u003e: 37 Hz\u003cbr\u003e\u003cstrong\u003eBass Reflex -3dB Frequency\u003c\/strong\u003e: 39 Hz\u003cbr\u003e","brand":"HELIX","offers":[{"title":"Default Title","offer_id":53772777226577,"sku":"K331002","price":174.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1041\/2772\/5905\/files\/HELIX_K-10S_Pers-Membran_1280x1280px_09-06-2021.jpg?v=1778708670","url":"https:\/\/shoponyxac.co.uk\/products\/helix-k-10s-250mm-dual-voice-coil-subwoofer-84-5mm-depth","provider":"Onyx Auto Care","version":"1.0","type":"link"}