{"product_id":"soundqubed-hds3-3-series-15-subwoofer-1-500-watts-rms-d2-d4","title":"Soundqubed HDS3.3 Series 15\" Subwoofer 1,500 Watts RMS D2\/D4","description":"\u003ch2\u003e\u003cstrong\u003eSoundQubed HDS3.3-15 — 1,500W RMS Daily\/SQL 15\" Subwoofer\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSoundQubed HDS3.3 Series 15\" subwoofer\u003c\/strong\u003e is the largest driver in the HDS3.3 lineup — a high-value, daily-driver and SQL-focused 15-inch subwoofer built for enthusiasts who want maximum cone area, deep infrasonic bass extension, and the kind of low-end presence that fills a vehicle from front to back. Rated at \u003cstrong\u003e1,500 watts RMS and 3,000 watts peak\u003c\/strong\u003e, the HDS3.3-15 is powered by a \u003cstrong\u003e160 oz magnet\u003c\/strong\u003e, a \u003cstrong\u003e3-inch diameter voice coil\u003c\/strong\u003e with a 40mm coil length, and a motor assembly tuned for controlled excursion and musical accuracy. Available in \u003cstrong\u003eDual 2 Ohm (D2)\u003c\/strong\u003e and \u003cstrong\u003eDual 4 Ohm (D4)\u003c\/strong\u003e configurations, this sub wires cleanly into a wide range of mono block amplifiers — making it an ideal choice for daily builds, SQL setups, and anyone who wants serious low-end output without stepping up to a full competition driver.\u003c\/p\u003e\n\n\u003cp\u003eWith an \u003cstrong\u003eXmax of 13mm (±)\u003c\/strong\u003e and \u003cstrong\u003eXmech of 27mm (±)\u003c\/strong\u003e, the HDS3.3-15 delivers controlled linear cone travel across its massive \u003cstrong\u003e805 cm² cone area (SD)\u003c\/strong\u003e — the largest in the HDS3.3 series — producing deep, authoritative sub-bass extension down to a \u003cstrong\u003efree-air resonance (Fs) of 28.7 Hz (D2) \/ 28.5 Hz (D4)\u003c\/strong\u003e. With sensitivity ratings of \u003cstrong\u003e86.5 dB (D2) \/ 85.7 dB (D4)\u003c\/strong\u003e, the HDS3.3-15 is the most efficient driver in the lineup, getting seriously loud on moderate amplifier power while delivering the kind of chest-thumping, room-filling bass that only a 15\" can produce.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose the SoundQubed HDS3.3-15?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1,500W RMS \/ 3,000W Peak Power:\u003c\/strong\u003e Plenty of headroom for daily and SQL builds — pairs perfectly with mid-range mono block amplifiers in the 500–1,500W range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e160 oz Magnet Assembly:\u003c\/strong\u003e Solid motor force delivers BL of 19.2 N\/A (D2) \/ 23.7 N\/A (D4) for controlled, accurate cone movement across the full excursion range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\" Voice Coil, 40mm Coil Length:\u003c\/strong\u003e Larger coil diameter improves thermal management for sustained daily use without voice coil fatigue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e13mm Xmax \/ 27mm Xmech:\u003c\/strong\u003e Well-tuned excursion for a 15\" daily driver — deep, clean bass without over-excursion at moderate power levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual 2 Ohm \u0026amp; Dual 4 Ohm Available:\u003c\/strong\u003e Wire D2 to 1Ω or 4Ω, wire D4 to 2Ω or 8Ω — compatible with a wide range of amplifier impedance ratings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Fs (28.5–28.7 Hz):\u003c\/strong\u003e Tuned for deep infrasonic bass reproduction — ideal for ported enclosures targeting 28–34 Hz tuning frequencies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePorted Enclosure Optimized:\u003c\/strong\u003e Recommended ported volume 3–6 ft³ and sealed 1.88–2.08 ft³ — versatile for any build style.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e86.5 dB Sensitivity:\u003c\/strong\u003e The most efficient driver in the HDS3.3 lineup — gets seriously loud without demanding every last watt from your amplifier.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAmplifier \u0026amp; Enclosure Recommendations\u003c\/h2\u003e\n\u003cp\u003eThe HDS3.3-15 pairs best with a \u003cstrong\u003emono block amplifier\u003c\/strong\u003e rated between 500–1,500W RMS at your wired impedance. For the \u003cstrong\u003eD2 (Dual 2 Ohm)\u003c\/strong\u003e variant, wire the coils in parallel for a \u003cstrong\u003e1Ω final load\u003c\/strong\u003e or in series for \u003cstrong\u003e4Ω\u003c\/strong\u003e. For the \u003cstrong\u003eD4 (Dual 4 Ohm)\u003c\/strong\u003e variant, wire in parallel for \u003cstrong\u003e2Ω\u003c\/strong\u003e or in series for \u003cstrong\u003e8Ω\u003c\/strong\u003e. A Class D mono amp stable at 1Ω or 2Ω is the most common pairing for this driver.\u003c\/p\u003e\n\u003cp\u003eFor enclosures, a \u003cstrong\u003eported box in the 3–6 ft³ range\u003c\/strong\u003e tuned to approximately 28–34 Hz will maximize low-end extension and output — the ideal setup for the HDS3.3-15's large cone area and low Fs. A \u003cstrong\u003esealed box in the 1.88–2.08 ft³ range\u003c\/strong\u003e delivers tight, accurate bass for SQL and daily listening where space is a constraint.\u003c\/p\u003e\n\n\u003ch2\u003eElectro Acoustic Specifications \u0026amp; Thiele Small Parameters\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color:#222;color:#fff;\"\u003e\n\u003cth style=\"padding:8px;border:1px solid #ccc;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003eHDS3.3-15D2\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003eHDS3.3-15D4\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eWoofer Size\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e15\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e15\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eRMS Power\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e1,500 W\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e1,500 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePeak Power\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e3,000 W\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e3,000 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMagnet Weight\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e160 oz\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e160 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCoil Diameter\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e3 in\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e3 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCoil Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e40 mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFs\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e28.7 Hz\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e28.5 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eImpedance\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e2+2 Ohm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e4+4 Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eQMS\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e8.64\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e5.84\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eQES\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e0.63\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e0.73\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eQTS\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e0.58\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e0.65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eVAS\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e69.2 L\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e77.2 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLe\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e2.34 mH\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e3.35 mH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eη (No)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e0.17%\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e0.18%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCMS\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e0.08 mm\/N\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e0.09 mm\/N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSensitivity (1W\/1M)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e86.5 dB\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e85.7 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBL\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e19.2 N\/A\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e23.7 N\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eXmax (±)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e13 mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e13 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eXmech (±)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e27 mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e27 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSD\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e805 cm²\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e805 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eMounting Dimensions\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color:#222;color:#fff;\"\u003e\n\u003cth style=\"padding:8px;border:1px solid #ccc;text-align:left;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003eA\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003eB\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003eC\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003eD\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eHDS3.3-15D2\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e395 mm \/ 15.55\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e355 mm \/ 13.98\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e186 mm \/ 7.32\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e218 mm \/ 8.58\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eHDS3.3-15D4\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e395 mm \/ 15.55\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e355 mm \/ 13.98\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e186 mm \/ 7.32\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e218 mm \/ 8.58\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEnclosure Suggestions\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color:#222;color:#fff;\"\u003e\n\u003cth style=\"padding:8px;border:1px solid #ccc;text-align:left;\"\u003eEnclosure Type\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003eHDS3.3-15 D2\/D4\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSealed Enclosure\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e1.88–2.08 ft³\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePorted Enclosure\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ccc;text-align:center;\"\u003e3–6 ft³\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat amplifier do I need for the SoundQubed HDS3.3-15?\u003c\/strong\u003e\u003cbr\u003eA mono block amplifier rated between \u003cstrong\u003e500–1,500W RMS\u003c\/strong\u003e at your wired impedance is ideal. The D2 wired to 1Ω or the D4 wired to 2Ω are the most common pairings. Any quality Class D mono amp stable at 1Ω or 2Ω will work great.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould I choose the D2 or D4 version?\u003c\/strong\u003e\u003cbr\u003eChoose \u003cstrong\u003eD2 (Dual 2 Ohm)\u003c\/strong\u003e if your amplifier is stable at 1Ω (parallel) or 4Ω (series). Choose \u003cstrong\u003eD4 (Dual 4 Ohm)\u003c\/strong\u003e if your amp is stable at 2Ω (parallel) or 8Ω (series). D2 is the most common choice for single-sub builds.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size box does the HDS3.3-15 need?\u003c\/strong\u003e\u003cbr\u003eFor \u003cstrong\u003eported\u003c\/strong\u003e, use \u003cstrong\u003e3–6 ft³\u003c\/strong\u003e tuned to approximately 28–34 Hz for maximum output and deep bass extension. For \u003cstrong\u003esealed\u003c\/strong\u003e, use \u003cstrong\u003e1.88–2.08 ft³\u003c\/strong\u003e for tight, accurate daily bass where space is limited.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the HDS3.3-15 good for daily use?\u003c\/strong\u003e\u003cbr\u003eAbsolutely — the HDS3.3-15 is built for daily driving and SQL builds. Its 86.5 dB sensitivity means it gets seriously loud on moderate power, and its 805 cm² cone area delivers the kind of deep, full bass that only a 15\" can produce — without the power demands of a full competition driver.\u003c\/p\u003e","brand":"SoundQubed","offers":[{"title":"Dual 2 Ohm","offer_id":43670161358915,"sku":null,"price":399.95,"currency_code":"USD","in_stock":true},{"title":"Dual 4 Ohm","offer_id":43670161391683,"sku":null,"price":399.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/9575\/7123\/files\/soundqubed_hds3.3_15_trinity_car_audio_84.png?v=1786662067","url":"https:\/\/www.trinitycaraudio.com\/products\/soundqubed-hds3-3-series-15-subwoofer-1-500-watts-rms-d2-d4","provider":"Trinity Car Audio","version":"1.0","type":"link"}