{"title":"Image Dynamics 8 inch Subwoofers","description":"","products":[{"product_id":"image-dynamics-idq8d2-v4-8inch-subwoofer","title":"Image Dynamics IDQ8 V4 8 inch Subwoofer","description":"\u003cstyle\u003e\n  .id-wrap { max-width: 100%; font-family: inherit; color: #e2e8f0 !important; }\n  .id-hero { background: #0f172a !important; border: 1px solid #334155 !important; padding: 36px 28px; border-radius: 12px; margin-bottom: 28px; border-bottom: 4px solid #0e7490 !important; }\n  .id-eyebrow { color: #94a3b8 !important; font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; margin: 0 0 10px 0; }\n  .id-hero h2 { color: #ffffff !important; font-size: 28px; margin: 0 0 8px 0; line-height: 1.2; }\n  .id-hero p { color: #e2e8f0 !important; font-size: 16px; margin: 0 0 18px 0; }\n  .id-badges { display: flex; flex-wrap: wrap; gap: 8px; }\n  .id-badge { background: #0e7490 !important; color: #ffffff !important; font-size: 13px; font-weight: 600; padding: 6px 12px; border-radius: 4px; }\n  .id-badge-alt { background: #1e293b !important; color: #e2e8f0 !important; border: 1px solid #334155 !important; }\n  .id-wrap h3 { color: #ffffff !important; font-size: 22px; margin: 28px 0 12px 0; border-left: 4px solid #0e7490 !important; padding-left: 12px; }\n  .id-wrap p { color: #e2e8f0 !important; font-size: 16px; line-height: 1.65; margin: 0 0 14px 0; }\n  .id-callout { background: #1e293b !important; border: 1px solid #94a3b8 !important; border-radius: 8px; padding: 18px 20px; margin: 22px 0; }\n  .id-callout p { color: #e2e8f0 !important; margin: 0; }\n  .id-statgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 22px 0; }\n  .id-stat { background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 8px; padding: 16px; text-align: center; }\n  .id-stat .id-statnum { color: #06b6d4 !important; font-size: 22px; font-weight: 700; display: block; }\n  .id-stat .id-statlabel { color: #94a3b8 !important; font-size: 12px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; display: block; margin-top: 4px; }\n  .id-cta { background: #0f172a !important; border: 1px solid #334155 !important; padding: 28px; border-radius: 12px; margin-top: 30px; text-align: center; border-top: 4px solid #0e7490 !important; }\n  .id-cta h3 { color: #ffffff !important; border-left: none !important; padding-left: 0; margin-top: 0; }\n  .id-cta p { color: #e2e8f0 !important; }\n\u003c\/style\u003e\n\u003cdiv class=\"id-wrap\"\u003e\n\u003cdiv class=\"id-hero\"\u003e\n\u003cp class=\"id-eyebrow\"\u003eImage Dynamics IDQ Series Subwoofers\u003c\/p\u003e\n\u003ch2\u003eImage Dynamics IDQ8 V.4 8 Inch Subwoofer\u003c\/h2\u003e\n\u003cp\u003eThe sound quality champion of compact 8 inch subwoofers. The IDQ8 V.4 uses a 180 ounce motor, 14.5mm Xmax, aluminum flat-wound extended voice coil, and a field-replaceable cone assembly with no glue required. Built and serviced in the USA for over a decade in sound quality competition.\u003c\/p\u003e\n\u003cdiv class=\"id-badges\"\u003e\n\u003cspan class=\"id-badge\"\u003e125W RMS\u003c\/span\u003e \u003cspan class=\"id-badge\"\u003e250W Peak\u003c\/span\u003e \u003cspan class=\"id-badge\"\u003eField-Replaceable Cone\u003c\/span\u003e \u003cspan class=\"id-badge id-badge-alt\"\u003eDual 2 or Dual 4 Ohm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eIDQ vs ID: A Different Platform Entirely\u003c\/h3\u003e\n\u003cp\u003eThe Image Dynamics IDQ8 V.4 is not a more expensive version of the Image Dynamics ID8 V.4. It is a different driver built around different engineering priorities. Where the ID8 uses a 90 ounce motor and copper voice coil wire, the IDQ8 uses a 180 ounce motor and aluminum flat-wound extended voice coil. Where the ID8 has a fixed cone assembly, the IDQ8 uses a field-replaceable cone assembly held by 16 screws with no adhesive, replaceable in under 15 minutes without specialized tools. The motor structure, voice coil geometry, and enclosure behavior are all different.\u003c\/p\u003e\n\u003cp\u003eThe IDQ Series exists because Image Dynamics identified a specific performance target: maximum tonal accuracy and dynamic impact in compact sealed enclosures, with a construction standard robust enough for long-term competition use and simple enough to service in the field. The IDQ8 has been the driver of choice for sound quality competitors in IASCA and MECA events for over a decade. That track record is the product of this specific platform, not the ID Series.\u003c\/p\u003e\n\u003cdiv class=\"id-statgrid\"\u003e\n\u003cdiv class=\"id-stat\"\u003e\n\u003cspan class=\"id-statnum\"\u003e180 oz\u003c\/span\u003e\u003cspan class=\"id-statlabel\"\u003eMotor\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"id-stat\"\u003e\n\u003cspan class=\"id-statnum\"\u003e14.5mm\u003c\/span\u003e\u003cspan class=\"id-statlabel\"\u003eXmax\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"id-stat\"\u003e\n\u003cspan class=\"id-statnum\"\u003e0.33\u003c\/span\u003e\u003cspan class=\"id-statlabel\"\u003eCu Ft Min Sealed\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"id-stat\"\u003e\n\u003cspan class=\"id-statnum\"\u003e16-Screw\u003c\/span\u003e\u003cspan class=\"id-statlabel\"\u003eReplaceable Cone\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAmerican Made Flat Wound Extended Voice Coil\u003c\/h3\u003e\n\u003cp\u003eThe IDQ8 V.4 uses an American-made aluminum flat-wound voice coil on a BASV former with 38.3mm (1.5 inch) of winding height. Flat-wound wire increases packing density in the magnetic gap, which means more conductor length and more motor force per unit gap height. The extended geometry keeps substantial coil length in the magnetic field throughout the full 14.5mm excursion range, maintaining motor linearity at both ends of travel. Aluminum wire has higher electrical conductivity per unit mass than copper, which reduces voice coil mass while keeping resistance in a workable range for 125 watt continuous power handling.\u003c\/p\u003e\n\u003ch3\u003eField-Replaceable Cone Assembly\u003c\/h3\u003e\n\u003cp\u003eThe field-replaceable cone assembly is the feature that distinguishes the IDQ Series from virtually every other production subwoofer. The entire cone, surround, spider, neck joint, and voice coil are integrated into a single assembly held to the basket by 16 screws and positioned by alignment shims. Remove the screws, lift out the assembly, position the replacement, insert the shims, reinstall the screws, remove the shims. No adhesive, no curing time, no professional reconing service required.\u003c\/p\u003e\n\u003cp\u003eThis matters because 8 inch subwoofers used in competition and daily high-excursion builds eventually need service. The alternative to a field-replaceable design is either a professional reconing service costing more than the driver or a replacement purchase. With the IDQ8, you buy a recone kit, do the job yourself, and the motor structure continues in service. Image Dynamics calls this the \"green\" approach and it is simply a better product design for anyone who plans to keep a subwoofer for years.\u003c\/p\u003e\n\u003ch3\u003eIDQ8 in Sealed Enclosures\u003c\/h3\u003e\n\u003cp\u003eThe IDQ8 is engineered specifically for small sealed enclosures. The very small Vas (6.662 L for D2) means the acoustic stiffness of even a modest sealed box dominates the system resonance, which gives the driver precise acoustic control from small volumes. The recommended sealed range runs from 0.33 to 0.73 cubic feet. The enclosure performance section below shows Qtc and F3 for both variants across all three volumes.\u003c\/p\u003e\n\u003cp\u003eThe IDQ8 also supports ported applications, with published alignments from 0.50 to 1.00 cubic feet tuned to 40 Hz, extending F3 down to 32-37 Hz for listeners who have the enclosure space and want deeper extension. Ported port dimensions are in the IDQ Series V.4 manual.\u003c\/p\u003e\n\u003cdiv class=\"id-callout\"\u003e\n\u003cp\u003e\u003cstrong\u003eFitment at a glance:\u003c\/strong\u003e mounting depth 4.92 inches, cutout 7.25 inches, outside diameter 8.35 inches, driver displacement 0.05 cubic feet. Enclosure volumes are net internal per Image Dynamics specifications. Break-in period of several days to one week is recommended before reaching optimal performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eD2 or D4\u003c\/h3\u003e\n\u003cp\u003eThe D2 wires to 1 ohm or 4 ohms; the D4 wires to 2 ohms or 8 ohms. The D4 has slightly higher sensitivity at 84 dB versus 82 dB for the D2. The T\/S parameters differ between variants (Vas 6.662 L D2 vs 6.191 L D4) but both produce very similar sealed alignments. Choose based on your amplifier's preferred impedance.\u003c\/p\u003e\n\u003ch3\u003eBuilt and Backed\u003c\/h3\u003e\n\u003cp\u003eHand-built in Ontario, California. The Image Dynamics IDQ8 V.4 carries a 1-year limited warranty through authorized dealers. Every unit sold by Audio Intensity is brand new with full warranty coverage.\u003c\/p\u003e\n\u003cdiv class=\"id-cta\"\u003e\n\u003ch3\u003eAuthorized Image Dynamics Dealer\u003c\/h3\u003e\n\u003cp\u003eAudio Intensity ships the Image Dynamics IDQ8 V.4 fast from Tullahoma, Tennessee. Tell us your enclosure space and your amplifier and we will help you build the right box for the application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .id-enc { max-width: 100%; font-family: inherit; }\n  .id-enc h3 { color: #ffffff !important; font-size: 22px; margin: 28px 0 12px 0; border-left: 4px solid #0e7490 !important; padding-left: 12px; }\n  .id-enc p { color: #e2e8f0 !important; font-size: 16px; line-height: 1.65; margin: 0 0 14px 0; }\n  .id-enc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 20px 0; }\n  @media (max-width: 640px) { .id-enc-grid { grid-template-columns: 1fr; } }\n  .id-enc-card { background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 10px; overflow: hidden; }\n  .id-enc-card-head { background: #0e7490 !important; color: #ffffff !important; padding: 10px 16px; font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; }\n  .id-enc-table { width: 100%; border-collapse: collapse; }\n  .id-enc-table th { background: #1e293b !important; color: #94a3b8 !important; font-size: 12px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; padding: 8px 12px; text-align: left; }\n  .id-enc-table td { padding: 10px 12px; border-bottom: 1px solid #1e293b !important; font-size: 14px; }\n  .id-enc-table td:first-child { color: #e2e8f0 !important; font-weight: 600; }\n  .id-enc-table td:not(:first-child) { color: #ffffff !important; text-align: center; }\n  .id-enc-table tr:last-child td { border-bottom: none !important; }\n  .id-enc-table .id-optimal td { background: #0c2a30 !important; }\n  .id-enc-table .id-optimal td:first-child { color: #4ade80 !important; }\n  .id-char { font-size: 11px; color: #64748b !important; display: block; font-weight: 400; margin-top: 2px; }\n  .id-graph-wrap { background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 10px; padding: 16px; margin: 16px 0; }\n  .id-graph-title { color: #94a3b8 !important; font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; margin: 0 0 10px 0; }\n  .id-graph-legend { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 10px; }\n  .id-graph-legend-item { display: flex; align-items: center; gap: 6px; font-size: 12px; color: #64748b !important; }\n  .id-graph-legend-swatch { width: 24px; height: 3px; border-radius: 2px; display: inline-block; }\n  .id-enc-note { background: #1e293b !important; border: 1px solid #334155 !important; border-radius: 8px; padding: 16px 18px; margin: 18px 0 0 0; }\n  .id-enc-note p { color: #e2e8f0 !important; font-size: 14px; margin: 0; line-height: 1.6; }\n  .id-enc-link { color: #06b6d4 !important; text-decoration: underline; }\n  .id-enc-warn { background: #0c2a30 !important; border: 1px solid #0e7490 !important; border-radius: 8px; padding: 14px 16px; margin: 14px 0; }\n  .id-enc-warn p { color: #e2e8f0 !important; font-size: 14px; margin: 0; }\n\u003c\/style\u003e\n\u003cdiv class=\"id-enc\"\u003e\n\u003ch3\u003eSealed Enclosure Performance: Pre-Calculated Results\u003c\/h3\u003e\n\u003cp\u003eUsing Image Dynamics' published Thiele-Small parameters and their recommended sealed volumes, here are the predicted Qtc, system resonance (Fc), and F3 rolloff. Volumes are net internal per the IDQ Series manual. Calculated using the same formulas as the Audio Intensity Sealed Box Calculator.\u003c\/p\u003e\n\u003cp\u003eThe IDQ8 is a high-Qts driver with an extremely small Vas (6.66 L for D2), engineered specifically for small sealed enclosures where high acoustic stiffness controls excursion and shapes the alignment. The high Fs (51 Hz) means the sealed F3 sits in the 47-51 Hz range, which is the tradeoff for operating well in very compact boxes. The ported alignments, listed below, bring F3 down significantly for listeners who have the enclosure volume and want deeper extension.\u003c\/p\u003e\n\u003cdiv class=\"id-enc-grid\"\u003e\n\u003cdiv class=\"id-enc-card\"\u003e\n\u003cdiv class=\"id-enc-card-head\"\u003eD2 — Dual 2 Ohm  |  Qts 0.807  |  Fs 51 Hz  |  Vas 6.662 L\u003c\/div\u003e\n\u003ctable class=\"id-enc-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBox Volume\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003eFc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.33 cu ft\u003cspan class=\"id-char\"\u003eCompact \/ max power handling (250W)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.056\u003c\/td\u003e\n\u003ctd\u003e66.7 Hz\u003c\/td\u003e\n\u003ctd\u003e51.3 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"id-optimal\"\u003e\n\u003ctd\u003e0.53 cu ft ★\u003cspan class=\"id-char\"\u003eUniversal \/ balanced (200W max)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.970\u003c\/td\u003e\n\u003ctd\u003e61.3 Hz\u003c\/td\u003e\n\u003ctd\u003e48.9 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.73 cu ft\u003cspan class=\"id-char\"\u003eAudiophile \/ most extension (150W max)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.928\u003c\/td\u003e\n\u003ctd\u003e58.6 Hz\u003c\/td\u003e\n\u003ctd\u003e47.8 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"id-enc-card\"\u003e\n\u003cdiv class=\"id-enc-card-head\"\u003eD4 — Dual 4 Ohm  |  Qts 0.839  |  Fs 51 Hz  |  Vas 6.191 L\u003c\/div\u003e\n\u003ctable class=\"id-enc-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBox Volume\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003eFc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.33 cu ft\u003cspan class=\"id-char\"\u003eCompact \/ max power handling (250W)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.082\u003c\/td\u003e\n\u003ctd\u003e65.8 Hz\u003c\/td\u003e\n\u003ctd\u003e50.1 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"id-optimal\"\u003e\n\u003ctd\u003e0.53 cu ft ★\u003cspan class=\"id-char\"\u003eUniversal \/ balanced (200W max)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.997\u003c\/td\u003e\n\u003ctd\u003e60.6 Hz\u003c\/td\u003e\n\u003ctd\u003e47.7 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.73 cu ft\u003cspan class=\"id-char\"\u003eAudiophile \/ most extension (150W max)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.956\u003c\/td\u003e\n\u003ctd\u003e58.1 Hz\u003c\/td\u003e\n\u003ctd\u003e46.7 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"id-enc-grid\"\u003e\n\u003cdiv class=\"id-graph-wrap\"\u003e\n\u003cp class=\"id-graph-title\"\u003eD2 Frequency 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262.5,45.8 263.7,45.9 264.9,45.9 266.2,45.9 267.4,46.0 268.6,46.0 269.8,46.1 271.1,46.1 272.3,46.2 273.5,46.2 274.7,46.3 276.0,46.4 277.2,46.4 278.4,46.5 279.7,46.5 280.9,46.6 282.1,46.7 283.3,46.7 284.6,46.8 285.8,46.9 287.0,46.9 288.2,47.0 289.5,47.1 290.7,47.1 291.9,47.2 293.1,47.3 294.4,47.3 295.6,47.4 296.8,47.5 298.1,47.5 299.3,47.6 300.5,47.7 301.7,47.7 303.0,47.8 304.2,47.9 305.4,47.9 306.6,48.0 307.9,48.0 309.1,48.1 310.3,48.2 311.5,48.2 312.8,48.3 314.0,48.4 315.2,48.4 316.5,48.5 317.7,48.5 318.9,48.6 320.1,48.6 321.4,48.7 322.6,48.8 323.8,48.8 325.0,48.9 326.3,48.9 327.5,49.0 328.7,49.0 329.9,49.1 331.2,49.1 332.4,49.2 333.6,49.2 334.9,49.3 336.1,49.3 337.3,49.4 338.5,49.4 339.8,49.5 341.0,49.5 342.2,49.6 343.4,49.6 344.7,49.6 345.9,49.7 347.1,49.7 348.3,49.8 349.6,49.8 350.8,49.9 352.0,49.9 353.3,49.9 354.5,50.0 355.7,50.0 356.9,50.0 358.2,50.1 359.4,50.1 360.6,50.1 361.8,50.2 363.1,50.2 364.3,50.2 365.5,50.3 366.7,50.3 368.0,50.3 369.2,50.4 370.4,50.4 371.7,50.4 372.9,50.5 374.1,50.5 375.3,50.5 376.6,50.6 377.8,50.6 379.0,50.6 380.2,50.6 381.5,50.7 382.7,50.7 383.9,50.7 385.1,50.7 386.4,50.8 387.6,50.8 388.8,50.8 390.1,50.8 391.3,50.8 392.5,50.9 393.7,50.9 395.0,50.9 396.2,50.9 397.4,51.0 398.6,51.0 399.9,51.0 401.1,51.0 402.3,51.0 403.5,51.1 404.8,51.1 406.0,51.1\" fill=\"none\" stroke=\"#06b6d4\" stroke-width=\"1.5\" stroke-linejoin=\"round\" stroke-dasharray=\"5 3\"\u003e\u003c\/polyline\u003e\n\u003c\/svg\u003e\n\u003cdiv class=\"id-graph-legend\"\u003e\n\u003cspan class=\"id-graph-legend-item\"\u003e\u003cspan class=\"id-graph-legend-swatch\" style=\"background: #ef4444;\"\u003e\u003c\/span\u003e0.33 cu ft (Qtc 1.082)\u003c\/span\u003e \u003cspan class=\"id-graph-legend-item\"\u003e\u003cspan class=\"id-graph-legend-swatch\" style=\"background: #4ade80;\"\u003e\u003c\/span\u003e0.53 cu ft (Qtc 0.997) ★\u003c\/span\u003e \u003cspan class=\"id-graph-legend-item\"\u003e\u003cspan class=\"id-graph-legend-swatch\" style=\"background: #06b6d4;\"\u003e\u003c\/span\u003e0.73 cu ft (Qtc 0.956)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"id-enc-note\"\u003e\n\u003cp\u003e\u003cstrong style=\"color: #06b6d4 !important;\"\u003ePorted extension and power notes:\u003c\/strong\u003e The IDQ8 ported alignments bring F3 down to 32-37 Hz at volumes of 0.50-1.00 cu ft tuned to 40 Hz. For listeners who want genuine deep bass from an 8 inch driver and have the enclosure space, the ported option is worth considering. Power handling follows the same de-rating as sealed: larger boxes reduce acoustic stiffness and allow more excursion. Match your amplifier to the enclosure you plan to build. Port dimensions for each ported alignment are in the IDQ Series V.4 manual. \u003ca class=\"id-enc-link\" href=\"\/pages\/sealed-box-calculator\"\u003eRun your own numbers in the Sealed Box Calculator.\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 8px; padding: 16px 20px; margin: 24px 0;\"\u003e\n\u003cp style=\"color: #e2e8f0 !important; font-size: 15px; margin: 0; line-height: 1.6;\"\u003eReady to build? The \u003cstrong style=\"color: #06b6d4 !important;\"\u003eEnclosures tab above\u003c\/strong\u003e lists the Proline X sealed enclosures we build specifically for 8 inch drivers, CNC-cut in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Image Dynamics","offers":[{"title":"Dual 2 ohm","offer_id":41762711601241,"sku":"IDQ8 D2 V4","price":193.99,"currency_code":"USD","in_stock":true},{"title":"Dual 4 ohm","offer_id":41762711634009,"sku":"IDQ8 D4 V4","price":193.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/image-dynamics-idq8-v4-8inch-subwoofersubwooferimage-dynamics-514968.jpg?v=1761970190"},{"product_id":"image-dynamics-id8-v4-8inch-subwoofer","title":"Image Dynamics ID8 V4 8inch Subwoofer","description":"\u003cstyle\u003e\n  .id-wrap { max-width: 100%; font-family: inherit; color: #e2e8f0 !important; }\n  .id-hero { background: #0f172a !important; border: 1px solid #334155 !important; padding: 36px 28px; border-radius: 12px; margin-bottom: 28px; border-bottom: 4px solid #0e7490 !important; }\n  .id-eyebrow { color: #94a3b8 !important; font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; margin: 0 0 10px 0; }\n  .id-hero h2 { color: #ffffff !important; font-size: 28px; margin: 0 0 8px 0; line-height: 1.2; }\n  .id-hero p { color: #e2e8f0 !important; font-size: 16px; margin: 0 0 18px 0; }\n  .id-badges { display: flex; flex-wrap: wrap; gap: 8px; }\n  .id-badge { background: #0e7490 !important; color: #ffffff !important; font-size: 13px; font-weight: 600; padding: 6px 12px; border-radius: 4px; }\n  .id-badge-alt { background: #1e293b !important; color: #e2e8f0 !important; border: 1px solid #334155 !important; }\n  .id-wrap h3 { color: #ffffff !important; font-size: 22px; margin: 28px 0 12px 0; border-left: 4px solid #0e7490 !important; padding-left: 12px; }\n  .id-wrap p { color: #e2e8f0 !important; font-size: 16px; line-height: 1.65; margin: 0 0 14px 0; }\n  .id-callout { background: #1e293b !important; border: 1px solid #94a3b8 !important; border-radius: 8px; padding: 18px 20px; margin: 22px 0; }\n  .id-callout p { color: #e2e8f0 !important; margin: 0; }\n  .id-statgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 22px 0; }\n  .id-stat { background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 8px; padding: 16px; text-align: center; }\n  .id-stat .id-statnum { color: #06b6d4 !important; font-size: 22px; font-weight: 700; display: block; }\n  .id-stat .id-statlabel { color: #94a3b8 !important; font-size: 12px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; display: block; margin-top: 4px; }\n  .id-cta { background: #0f172a !important; border: 1px solid #334155 !important; padding: 28px; border-radius: 12px; margin-top: 30px; text-align: center; border-top: 4px solid #0e7490 !important; }\n  .id-cta h3 { color: #ffffff !important; border-left: none !important; padding-left: 0; margin-top: 0; }\n  .id-cta p { color: #e2e8f0 !important; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"id-wrap\"\u003e\n\n  \u003cdiv class=\"id-hero\"\u003e\n    \u003cp class=\"id-eyebrow\"\u003eImage Dynamics ID Series Subwoofers\u003c\/p\u003e\n    \u003ch2\u003eImage Dynamics ID8 V.4 8 Inch Subwoofer\u003c\/h2\u003e\n    \u003cp\u003eHand-built in the USA since 1992. The ID8 V.4 fits into enclosures as small as 0.20 cubic feet, handles 150 watts RMS, and uses construction materials that Image Dynamics specifies by name: Parabolic Santoprene surround, Poly\/Mica cone, Hybrid Progressive Nomex spider, BASV former.\u003c\/p\u003e\n    \u003cdiv class=\"id-badges\"\u003e\n      \u003cspan class=\"id-badge\"\u003e150W RMS\u003c\/span\u003e\n      \u003cspan class=\"id-badge\"\u003e300W Peak\u003c\/span\u003e\n      \u003cspan class=\"id-badge\"\u003eHand-Built in the USA\u003c\/span\u003e\n      \u003cspan class=\"id-badge id-badge-alt\"\u003eDual 2 or Dual 4 Ohm\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eMicro Enclosure, Real Bass\u003c\/h3\u003e\n  \u003cp\u003eThe Image Dynamics ID8 V.4 is engineered for installations where enclosure volume is the hard constraint. The recommended sealed range starts at 0.20 cubic feet, which fits under seats, in door pods, in cargo corners, and behind panels that no larger driver can reach. At 0.35 cubic feet, the Universal alignment delivers balanced, musical bass for daily use. At 0.45 cubic feet, the Audiophile alignment extends further at the cost of some power handling headroom.\u003c\/p\u003e\n  \u003cp\u003eThis is not a budget driver with a budget price that happens to fit in small boxes. Image Dynamics engineered the ID Series from the start for small enclosure performance: a Qts of 0.463 (D2) provides a well-controlled sealed alignment across the full recommended volume range, and 12.5mm of one-way Xmax gives the driver real excursion capability within those compact dimensions.\u003c\/p\u003e\n\n  \u003cdiv class=\"id-statgrid\"\u003e\n    \u003cdiv class=\"id-stat\"\u003e\n\u003cspan class=\"id-statnum\"\u003e0.20\u003c\/span\u003e\u003cspan class=\"id-statlabel\"\u003eCu Ft Min Sealed\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"id-stat\"\u003e\n\u003cspan class=\"id-statnum\"\u003e12.5mm\u003c\/span\u003e\u003cspan class=\"id-statlabel\"\u003eXmax\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"id-stat\"\u003e\n\u003cspan class=\"id-statnum\"\u003e150W\u003c\/span\u003e\u003cspan class=\"id-statlabel\"\u003eRMS Power\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"id-stat\"\u003e\n\u003cspan class=\"id-statnum\"\u003e4.45 in\u003c\/span\u003e\u003cspan class=\"id-statlabel\"\u003eMounting Depth\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eMaterials That Matter\u003c\/h3\u003e\n  \u003cp\u003eThe Parabolic Santoprene surround is the first thing to understand. Santoprene is a thermoplastic rubber compound with exceptional UV resistance, temperature stability, and long-term compliance retention. Image Dynamics chose it specifically for automotive use where surrounds face heat, cold, and sun exposure that destroy foam and degrade generic rubber over time. The parabolic profile maintains cone linearity at high excursion.\u003c\/p\u003e\n  \u003cp\u003eThe Poly\/Mica cone embeds mica particles in a polypropylene matrix to increase cone stiffness without adding mass. Stiffer cone, lower distortion, more accurate bass reproduction at all volume levels. The Hybrid Progressive Nomex spider gives firm control at high output and maintains fine detail at low listening levels simultaneously, which is why the ID Series has been used in sound quality competition as well as daily listening builds.\u003c\/p\u003e\n  \u003cp\u003eThe BASV (Body Alignment Stiffening Voice Coil) former pulls heat away from the voice coil winding during sustained high-power operation. Better heat dissipation equals longer driver life at rated power, and Image Dynamics rates the ID8 V.4 at a consistent 150 watts RMS continuous precisely because they design to that figure rather than inflating it.\u003c\/p\u003e\n\n  \u003ch3\u003eThe Extended Y-35 Motor\u003c\/h3\u003e\n  \u003cp\u003eY-35 grade motor steel has a higher magnetic flux density than standard motor steel, which increases efficiency and bass output per watt. The Extended Y-35 motor on the ID8 V.4 provides enhanced power handling and additional cooling for the voice coil. With a 90 ounce motor assembly and only an 8-inch cone to drive, the ID8 has strong motor force relative to its moving mass, which contributes to its tight, controlled bass character in sealed enclosures.\u003c\/p\u003e\n\n  \u003ch3\u003eEnclosure Flexibility\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics recommends sealed enclosures for the ID Series for optimal sound quality, but the ID8 V.4 supports sealed, ported, and bandpass applications. The sealed range of 0.20 to 0.45 cubic feet covers everything from the tightest under-seat build to a dedicated audiophile enclosure. Ported alignment extends F3 down to 34 Hz in the Audiophile 0.90 cubic foot configuration at reduced power handling. The enclosure performance section below shows the calculated sealed alignments for both D2 and D4 variants.\u003c\/p\u003e\n\n  \u003cdiv class=\"id-callout\"\u003e\n    \u003cp\u003e\u003cstrong\u003eFitment at a glance:\u003c\/strong\u003e mounting depth 4.45 inches, cutout 7.125 inches, outside diameter 8.375 inches, driver displacement 0.0525 cubic feet. For ported enclosure dimensions and port specifications, the ID Series manual provides Compact, Universal, and Audiophile ported configurations with port diameter and length.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eD2 or D4\u003c\/h3\u003e\n  \u003cp\u003eThe D2 wires to 1 ohm or 4 ohms; the D4 wires to 2 ohms or 8 ohms. The variants have meaningfully different Thiele-Small parameters: the D2 has a larger Vas (26.01 L vs 13.47 L), producing a different sealed alignment character at the same box size. The enclosure performance section below shows exactly how they differ. Choose based on your amplifier's preferred impedance first.\u003c\/p\u003e\n\n  \u003ch3\u003eBuilt and Backed\u003c\/h3\u003e\n  \u003cp\u003eHand-built in Ontario, California since 1992. Image Dynamics covers the ID8 V.4 with a 1-year limited warranty through authorized dealers. Every unit sold by Audio Intensity is brand new with full warranty coverage.\u003c\/p\u003e\n\n  \u003cdiv class=\"id-cta\"\u003e\n    \u003ch3\u003eAuthorized Image Dynamics Dealer\u003c\/h3\u003e\n    \u003cp\u003eAudio Intensity ships the Image Dynamics ID8 V.4 fast from Tullahoma, Tennessee, with real installer support. Tell us your available enclosure space and your amplifier and we will help you pick the right voice coil and build the right box.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .id-enc { max-width: 100%; font-family: inherit; }\n  .id-enc h3 { color: #ffffff !important; font-size: 22px; margin: 28px 0 12px 0; border-left: 4px solid #0e7490 !important; padding-left: 12px; }\n  .id-enc p { color: #e2e8f0 !important; font-size: 16px; line-height: 1.65; margin: 0 0 14px 0; }\n  .id-enc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 20px 0; }\n  @media (max-width: 640px) { .id-enc-grid { grid-template-columns: 1fr; } }\n  .id-enc-card { background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 10px; overflow: hidden; }\n  .id-enc-card-head { background: #0e7490 !important; color: #ffffff !important; padding: 10px 16px; font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; }\n  .id-enc-table { width: 100%; border-collapse: collapse; }\n  .id-enc-table th { background: #1e293b !important; color: #94a3b8 !important; font-size: 12px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; padding: 8px 12px; text-align: left; }\n  .id-enc-table td { padding: 10px 12px; border-bottom: 1px solid #1e293b !important; font-size: 14px; }\n  .id-enc-table td:first-child { color: #e2e8f0 !important; font-weight: 600; }\n  .id-enc-table td:not(:first-child) { color: #ffffff !important; text-align: center; }\n  .id-enc-table tr:last-child td { border-bottom: none !important; }\n  .id-enc-table .id-optimal td { background: #0c2a30 !important; }\n  .id-enc-table .id-optimal td:first-child { color: #4ade80 !important; }\n  .id-char { font-size: 11px; color: #64748b !important; display: block; font-weight: 400; margin-top: 2px; }\n  .id-graph-wrap { background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 10px; padding: 16px; margin: 16px 0; }\n  .id-graph-title { color: #94a3b8 !important; font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; margin: 0 0 10px 0; }\n  .id-graph-legend { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 10px; }\n  .id-graph-legend-item { display: flex; align-items: center; gap: 6px; font-size: 12px; color: #64748b !important; }\n  .id-graph-legend-swatch { width: 24px; height: 3px; border-radius: 2px; display: inline-block; }\n  .id-enc-note { background: #1e293b !important; border: 1px solid #334155 !important; border-radius: 8px; padding: 16px 18px; margin: 18px 0 0 0; }\n  .id-enc-note p { color: #e2e8f0 !important; font-size: 14px; margin: 0; line-height: 1.6; }\n  .id-enc-link { color: #06b6d4 !important; text-decoration: underline; }\n  .id-enc-warn { background: #0c2a30 !important; border: 1px solid #0e7490 !important; border-radius: 8px; padding: 14px 16px; margin: 14px 0; }\n  .id-enc-warn p { color: #e2e8f0 !important; font-size: 14px; margin: 0; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"id-enc\"\u003e\n  \u003ch3\u003eSealed Enclosure Performance: Pre-Calculated Results\u003c\/h3\u003e\n  \u003cp\u003eUsing Image Dynamics' published Thiele-Small parameters, here are the predicted Qtc, system resonance (Fc), and F3 rolloff for each sealed volume. Volumes are net internal (including driver displacement), per the ID Series manual. Calculated using the same formulas as the Audio Intensity Sealed Box Calculator.\u003c\/p\u003e\n\n  \u003cdiv class=\"id-enc-warn\"\u003e\n    \u003cp\u003e\u003cstrong style=\"color:#06b6d4 !important;\"\u003eD2 vs D4 alignment note:\u003c\/strong\u003e The D2 and D4 have significantly different Vas values (26.01 L vs 13.47 L), which produces different sealed alignments in the same enclosure. The D4's smaller Vas means it is relatively less affected by sealed box volume, running lower Qtc and lower F3 at the same box size. Image Dynamics publishes a single F3 table covering both variants; the calculated values below reflect the actual measured difference between them.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"id-enc-grid\"\u003e\n    \u003cdiv class=\"id-enc-card\"\u003e\n      \u003cdiv class=\"id-enc-card-head\"\u003eD2 — Dual 2 Ohm  |  Qts 0.463  |  Fs 31 Hz  |  Vas 26.01 L\u003c\/div\u003e\n      \u003ctable class=\"id-enc-table\"\u003e\n        \u003ctr\u003e\n\u003cth\u003eBox Volume\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003eFc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e0.20 cu ft\u003cspan class=\"id-char\"\u003eCompact \/ max power handling (250W)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.095\u003c\/td\u003e\n\u003ctd\u003e73.3 Hz\u003c\/td\u003e\n\u003ctd\u003e55.6 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr class=\"id-optimal\"\u003e\n\u003ctd\u003e0.35 cu ft ★\u003cspan class=\"id-char\"\u003eUniversal \/ balanced (200W max)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.881\u003c\/td\u003e\n\u003ctd\u003e59.0 Hz\u003c\/td\u003e\n\u003ctd\u003e49.6 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e0.45 cu ft\u003cspan class=\"id-char\"\u003eAudiophile \/ most extension (150W max)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.807\u003c\/td\u003e\n\u003ctd\u003e54.1 Hz\u003c\/td\u003e\n\u003ctd\u003e48.2 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"id-enc-card\"\u003e\n      \u003cdiv class=\"id-enc-card-head\"\u003eD4 — Dual 4 Ohm  |  Qts 0.674  |  Fs 31 Hz  |  Vas 13.47 L\u003c\/div\u003e\n      \u003ctable class=\"id-enc-table\"\u003e\n        \u003ctr\u003e\n\u003cth\u003eBox Volume\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003eFc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e0.20 cu ft\u003cspan class=\"id-char\"\u003eCompact \/ max power handling (250W)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.239\u003c\/td\u003e\n\u003ctd\u003e57.0 Hz\u003c\/td\u003e\n\u003ctd\u003e41.6 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr class=\"id-optimal\"\u003e\n\u003ctd\u003e0.35 cu ft ★\u003cspan class=\"id-char\"\u003eUniversal \/ balanced (200W max)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.035\u003c\/td\u003e\n\u003ctd\u003e47.6 Hz\u003c\/td\u003e\n\u003ctd\u003e36.9 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e0.45 cu ft\u003cspan class=\"id-char\"\u003eAudiophile \/ most extension (150W max)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.967\u003c\/td\u003e\n\u003ctd\u003e44.5 Hz\u003c\/td\u003e\n\u003ctd\u003e35.5 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"id-enc-grid\"\u003e\n    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363.1,50.9 364.3,50.9 365.5,50.9 366.7,51.0 368.0,51.0 369.2,51.0 370.4,51.0 371.7,51.0 372.9,51.1 374.1,51.1 375.3,51.1 376.6,51.1 377.8,51.1 379.0,51.1 380.2,51.2 381.5,51.2 382.7,51.2 383.9,51.2 385.1,51.2 386.4,51.2 387.6,51.3 388.8,51.3 390.1,51.3 391.3,51.3 392.5,51.3 393.7,51.3 395.0,51.3 396.2,51.4 397.4,51.4 398.6,51.4 399.9,51.4 401.1,51.4 402.3,51.4 403.5,51.4 404.8,51.4 406.0,51.4\" fill=\"none\" stroke=\"#06b6d4\" stroke-width=\"1.5\" stroke-linejoin=\"round\" stroke-dasharray=\"5 3\"\u003e\u003c\/polyline\u003e\n\u003c\/svg\u003e\n      \u003cdiv class=\"id-graph-legend\"\u003e\n        \u003cspan class=\"id-graph-legend-item\"\u003e\u003cspan class=\"id-graph-legend-swatch\" style=\"background:#ef4444;\"\u003e\u003c\/span\u003e0.20 cu ft (Qtc 1.239)\u003c\/span\u003e\n        \u003cspan class=\"id-graph-legend-item\"\u003e\u003cspan class=\"id-graph-legend-swatch\" style=\"background:#4ade80;\"\u003e\u003c\/span\u003e0.35 cu ft (Qtc 1.035) ★\u003c\/span\u003e\n        \u003cspan class=\"id-graph-legend-item\"\u003e\u003cspan class=\"id-graph-legend-swatch\" style=\"background:#06b6d4;\"\u003e\u003c\/span\u003e0.45 cu ft (Qtc 0.967)\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"id-enc-note\"\u003e\n    \u003cp\u003e\u003cstrong style=\"color:#06b6d4 !important;\"\u003ePower handling note:\u003c\/strong\u003e Image Dynamics rates sealed enclosure power handling by volume. The 0.20 cu ft Compact alignment supports 250 watts RMS; the Universal 0.35 cu ft supports 200 watts RMS; the Audiophile 0.45 cu ft supports 150 watts RMS. Larger boxes reduce acoustic stiffness and allow more cone excursion at low frequencies, which limits power handling. Match your amplifier to the enclosure you plan to build. \u003ca class=\"id-enc-link\" href=\"\/pages\/sealed-box-calculator\"\u003eRun your own numbers in the Sealed Box Calculator.\u003c\/a\u003e\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 8px; padding: 16px 20px; margin: 24px 0;\"\u003e\n  \u003cp style=\"color: #e2e8f0 !important; font-size: 15px; margin: 0; line-height: 1.6;\"\u003eReady to build? The \u003cstrong style=\"color: #06b6d4 !important;\"\u003eEnclosures tab above\u003c\/strong\u003e lists the Proline X sealed enclosures we build specifically for 8 inch drivers, CNC-cut in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Image Dynamics","offers":[{"title":"Dual 2 ohm","offer_id":41762717007961,"sku":"ID8 D2 V4","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Dual 4 ohm","offer_id":41762717040729,"sku":"ID8 D4 V4","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/image-dynamics-id8-v4-8inch-subwoofersubwooferimage-dynamics-209018.jpg?v=1761970190"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/collections\/image-dynamics-8-inch-subwoofers-9201718.jpg?v=1764509901","url":"https:\/\/audiointensity.com\/collections\/image-dynamics-8-inch-subwoofers.oembed?page=2","provider":"Audio Intensity","version":"1.0","type":"link"}