{"product_id":"soundqubed-hdb2-2-series-8-subwoofer-2-dvc-400-watts-rms-d2-d4","title":"Soundqubed HDB2.2 Series 8\" Subwoofer 2\" DVC 400 Watts RMS D2\/D4","description":"\u003ch2\u003e\n\u003cstrong\u003eSoundQubed HDB2.2-8\u003c\/strong\u003e — 8\" Subwoofer | 400W RMS | Dual 2 or Dual 4 Ohm\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eSoundQubed HDB2.2-8\u003c\/strong\u003e is a compact, hard-hitting 8\" subwoofer built for enthusiasts who want real bass in tight spaces without breaking the bank. Rated at \u003cstrong\u003e400W RMS \/ 800W Peak\u003c\/strong\u003e, this driver delivers punchy, fast, and well-defined low-end that excels in daily driver builds, under-seat installs, and space-constrained custom enclosures. With a resonant frequency of 39 Hz (D2) \/ 40 Hz (D4) and sensitivity of 81.6 dB (D2) \/ 82.2 dB (D4), the HDB2.2-8 responds quickly and hits with authority — exactly what you want from an 8\" daily driver sub.\u003c\/p\u003e\n\n\u003cp\u003eThe motor assembly features a \u003cstrong\u003e68 oz magnet\u003c\/strong\u003e and a \u003cstrong\u003e2\" dual voice coil\u003c\/strong\u003e wound to 28mm, providing solid thermal management and dependable power handling for everyday use. The \u003cstrong\u003e10mm Xmax\u003c\/strong\u003e (18mm Xmech) delivers controlled linear excursion for clean bass at moderate output levels, while the 216 cm² cone area (SD) moves meaningful air for a compact 8\" platform. Available in \u003cstrong\u003eDual 2 Ohm\u003c\/strong\u003e and \u003cstrong\u003eDual 4 Ohm\u003c\/strong\u003e configurations, the HDB2.2-8 wires to 1Ω, 2Ω, or 4Ω to match a wide range of mono amplifiers.\u003c\/p\u003e\n\n\u003cp\u003eThe HDB2.2-8 thrives in sealed enclosures from \u003cstrong\u003e0.2–1.0 ft³\u003c\/strong\u003e for tight, accurate bass with fast transient response, or ported boxes from \u003cstrong\u003e0.7–1.5 ft³\u003c\/strong\u003e for added output and extension. Whether you’re building a compact under-seat system, a budget-friendly daily driver setup, or a clean SQL build in a small vehicle, the HDB2.2-8 delivers consistent, quality performance. Pair it with a 150–400W RMS mono amplifier for best results.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose the SoundQubed HDB2.2-8?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e400W RMS \/ 800W Peak Power Handling\u003c\/strong\u003e — Right-sized power for compact daily driver builds without over-amping your system.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e68 oz Magnet Structure\u003c\/strong\u003e — Solid motor for a value-tier 8\" driver, delivering reliable BL force and controlled cone movement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2\" Dual Voice Coil (28mm Wind)\u003c\/strong\u003e — Dual coil design provides wiring flexibility and improved heat dissipation for daily use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e10mm Xmax \/ 18mm Xmech\u003c\/strong\u003e — Controlled linear excursion for clean, accurate bass at everyday listening levels.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e39 Hz Resonant Frequency (D2)\u003c\/strong\u003e — Fast, punchy Fs ideal for tight, responsive bass in compact enclosures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eD2 or D4 Impedance Options\u003c\/strong\u003e — Wire to 1Ω, 2Ω, or 4Ω to match your amplifier’s optimal stable load.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e81.6–82.2 dB Sensitivity\u003c\/strong\u003e — Efficient output that performs well with modest amplifier power — ideal for budget and compact builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSoundQubed HDB2.2 Series Value\u003c\/strong\u003e — Quality construction and real-world performance at an accessible price point.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAmplifier \u0026amp; Enclosure Recommendations\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eAmplifier Pairing:\u003c\/strong\u003e The HDB2.2-8 is rated at 400W RMS, so target a mono amplifier delivering \u003cstrong\u003e150–400W RMS\u003c\/strong\u003e at your chosen final impedance. The \u003cstrong\u003eDual 2 Ohm\u003c\/strong\u003e variant wires to \u003cstrong\u003e1Ω\u003c\/strong\u003e (parallel) or \u003cstrong\u003e4Ω\u003c\/strong\u003e (series). The \u003cstrong\u003eDual 4 Ohm\u003c\/strong\u003e variant wires to \u003cstrong\u003e2Ω\u003c\/strong\u003e (parallel) or \u003cstrong\u003e8Ω\u003c\/strong\u003e (series). For most daily builds, wiring the D2 to 2Ω or the D4 to 2Ω gives you the best balance of power and amplifier stability. A 250–400W RMS mono block at 2Ω is the sweet spot for this driver.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eEnclosure:\u003c\/strong\u003e For \u003cstrong\u003esealed\u003c\/strong\u003e installs, target \u003cstrong\u003e0.2–1.0 ft³\u003c\/strong\u003e net internal volume for tight, accurate bass with excellent transient response — ideal for rock, country, and acoustic genres where punch and definition matter most. For \u003cstrong\u003eported\u003c\/strong\u003e builds, use \u003cstrong\u003e0.7–1.5 ft³\u003c\/strong\u003e net with a port tuned to 35–45 Hz for added output and low-frequency extension — great for hip-hop, EDM, and bass-heavy content. The HDB2.2-8 is a natural fit for under-seat enclosures, compact custom boxes, and any install where space is at a premium.\u003c\/p\u003e\n\n\u003ch2\u003eFull Specifications — T\/S 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\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:left;\"\u003eParameter\u003c\/th\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:center;\"\u003eHDB2.2-8D2\u003c\/th\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:center;\"\u003eHDB2.2-8D4\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eWoofer Size\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e8\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eRMS Power\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e400W\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e400W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003ePeak Power\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e800W\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e800W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eMagnet Weight\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e68 oz\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e68 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eCoil Diameter\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e2 in\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eCoil Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e28 mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eFs\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e39 Hz\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e40 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eImpedance\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e2+2 Ohm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e4+4 Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eQMS\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e4.96\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e4.39\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eQES\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.60\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.68\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eQTS\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.54\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.57\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eVAS\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e7.8 L\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e7.6 L\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eLe\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e1.20 mH\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e1.62 mH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eη₀ (No)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.08%\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.08%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eCMS\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.157 mm\/N\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.151 mm\/N\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eSensitivity (1W\/1m)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e81.6 dB\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e82.2 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eBL\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e12.37 N\/A\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e15.38 N\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eXmax (±)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e10 mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eXmech (±)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e18 mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e18 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eSD\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e216 cm²\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e216 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\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:left;\"\u003eModel\u003c\/th\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:center;\"\u003eA\u003c\/th\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:center;\"\u003eB\u003c\/th\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:center;\"\u003eC\u003c\/th\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:center;\"\u003eD\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eHDB2.2-8D2\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e214 mm \/ 8.43\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e182 mm \/ 7.17\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e160 mm \/ 6.3\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e112 mm \/ 4.41\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eHDB2.2-8D4\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e214 mm \/ 8.43\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e182 mm \/ 7.17\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e160 mm \/ 6.3\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e112 mm \/ 4.41\"\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\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:left;\"\u003eEnclosure Type\u003c\/th\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:center;\"\u003eHDB2.2-8D2\u003c\/th\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:center;\"\u003eHDB2.2-8D4\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eSealed Enclosure\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.2–1.0 ft³\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.2–1.0 ft³\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003ePorted Enclosure\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.7–1.5 ft³\u003c\/td\u003e\n\u003ctd style=\"padding:8px;text-align:center;\"\u003e0.7–1.5 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\n\u003cp\u003e\u003cstrong\u003eQ: What amplifier should I pair with the HDB2.2-8?\u003c\/strong\u003e\u003cbr\u003e\nA: Target a mono amplifier rated at \u003cstrong\u003e150–400W RMS\u003c\/strong\u003e at your final impedance. Wire the D2 to 1Ω or 4Ω, or the D4 to 2Ω or 8Ω. A 250–400W RMS mono block at 2Ω is the sweet spot for most daily builds.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What’s the difference between the D2 and D4 versions?\u003c\/strong\u003e\u003cbr\u003e\nA: Both handle the same power and share identical physical specs. The \u003cstrong\u003eD2 (Dual 2 Ohm)\u003c\/strong\u003e wires to 1Ω or 4Ω; the \u003cstrong\u003eD4 (Dual 4 Ohm)\u003c\/strong\u003e wires to 2Ω or 8Ω. Choose based on your amplifier’s stable impedance rating.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What box size does the HDB2.2-8 need?\u003c\/strong\u003e\u003cbr\u003e\nA: Sealed: \u003cstrong\u003e0.2–1.0 ft³\u003c\/strong\u003e for tight, accurate bass. Ported: \u003cstrong\u003e0.7–1.5 ft³\u003c\/strong\u003e tuned to 35–45 Hz for more output and extension. This driver is well-suited for under-seat enclosures and compact custom boxes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this sub good for daily use or competition?\u003c\/strong\u003e\u003cbr\u003e\nA: The HDB2.2-8 is a \u003cstrong\u003edaily driver sub\u003c\/strong\u003e — optimized for reliable, quality output at 400W RMS for everyday listening in compact installs. It delivers real bass performance at a price point that makes it one of the best values in the 8\" class.\u003c\/p\u003e","brand":"SoundQubed","offers":[{"title":"Dual 2 Ohm","offer_id":46117189615660,"sku":null,"price":159.95,"currency_code":"USD","in_stock":true},{"title":"Dual 4 Ohm","offer_id":46117189648428,"sku":null,"price":159.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/8964\/9196\/files\/SoundqubedHDB28inchsubwooferfrontcopy.png?v=1789003854","url":"https:\/\/www.4staraudio.com\/products\/soundqubed-hdb2-2-series-8-subwoofer-2-dvc-400-watts-rms-d2-d4","provider":"4StarAudio","version":"1.0","type":"link"}