Image Dynamics IDQ8 V4 8 inch Subwoofer

Audio Intensity Verified independent store

→

.id-wrap { max-width: 100%; font-family: inherit; color: #e2e8f0 !important; } .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; } .id-eyebrow { color: #94a3b8 !important; font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; margin: 0 0 10px 0; } .id-hero h2 { color: #ffffff !important; font-size: 28px; margin: 0 0 8px 0; line-height: 1.2; } .id-hero p { color: #e2e8f0 !important; font-size: 16px; margin: 0 0 18px 0; } .id-badges { display: flex; flex-wrap: wrap; gap: 8px; } .id-badge { background: #0e7490 !important; color: #ffffff !important; font-size: 13px; font-weight: 600; padding: 6px 12px; border-radius: 4px; } .id-badge-alt { background: #1e293b !important; color: #e2e8f0 !important; border: 1px solid #334155 !important; } .id-wrap h3 { color: #ffffff !important; font-size: 22px; margin: 28px 0 12px 0; border-left: 4px solid #0e7490 !important; padding-left: 12px; } .id-wrap p { color: #e2e8f0 !important; font-size: 16px; line-height: 1.65; margin: 0 0 14px 0; } .id-callout { background: #1e293b !important; border: 1px solid #94a3b8 !important; border-radius: 8px; padding: 18px 20px; margin: 22px 0; } .id-callout p { color: #e2e8f0 !important; margin: 0; } .id-statgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 22px 0; } .id-stat { background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 8px; padding: 16px; text-align: center; } .id-stat .id-statnum { color: #06b6d4 !important; font-size: 22px; font-weight: 700; display: block; } .id-stat .id-statlabel { color: #94a3b8 !important; font-size: 12px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; display: block; margin-top: 4px; } .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; } .id-cta h3 { color: #ffffff !important; border-left: none !important; padding-left: 0; margin-top: 0; } .id-cta p { color: #e2e8f0 !important; } Image Dynamics IDQ Series Subwoofers Image Dynamics IDQ8 V.4 8 Inch Subwoofer The 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. 125W RMS 250W Peak Field-Replaceable Cone Dual 2 or Dual 4 Ohm IDQ vs ID: A Different Platform Entirely The 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. The 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. 180 ozMotor 14.5mmXmax 0.33Cu Ft Min Sealed 16-ScrewReplaceable Cone American Made Flat Wound Extended Voice Coil The 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. Field-Replaceable Cone Assembly The 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. This 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. IDQ8 in Sealed Enclosures The 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. The 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. Fitment at a glance: 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. D2 or D4 The 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. Built and Backed Hand-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. Authorized Image Dynamics Dealer Audio 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. .id-enc { max-width: 100%; font-family: inherit; } .id-enc h3 { color: #ffffff !important; font-size: 22px; margin: 28px 0 12px 0; border-left: 4px solid #0e7490 !important; padding-left: 12px; } .id-enc p { color: #e2e8f0 !important; font-size: 16px; line-height: 1.65; margin: 0 0 14px 0; } .id-enc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 20px 0; } @media (max-width: 640px) { .id-enc-grid { grid-template-columns: 1fr; } } .id-enc-card { background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 10px; overflow: hidden; } .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; } .id-enc-table { width: 100%; border-collapse: collapse; } .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; } .id-enc-table td { padding: 10px 12px; border-bottom: 1px solid #1e293b !important; font-size: 14px; } .id-enc-table td:first-child { color: #e2e8f0 !important; font-weight: 600; } .id-enc-table td:not(:first-child) { color: #ffffff !important; text-align: center; } .id-enc-table tr:last-child td { border-bottom: none !important; } .id-enc-table .id-optimal td { background: #0c2a30 !important; } .id-enc-table .id-optimal td:first-child { color: #4ade80 !important; } .id-char { font-size: 11px; color: #64748b !important; display: block; font-weight: 400; margin-top: 2px; } .id-graph-wrap { background: #0f172a !important; border: 1px solid #334155 !important; border-radius: 10px; padding: 16px; margin: 16px 0; } .id-graph-title { color: #94a3b8 !important; font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; margin: 0 0 10px 0; } .id-graph-legend { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 10px; } .id-graph-legend-item { display: flex; align-items: center; gap: 6px; font-size: 12px; color: #64748b !important; } .id-graph-legend-swatch { width: 24px; height: 3px; border-radius: 2px; display: inline-block; } .id-enc-note { background: #1e293b !important; border: 1px solid #334155 !important; border-radius: 8px; padding: 16px 18px; margin: 18px 0 0 0; } .id-enc-note p { color: #e2e8f0 !important; font-size: 14px; margin: 0; line-height: 1.6; } .id-enc-link { color: #06b6d4 !important; text-decoration: underline; } .id-enc-warn { background: #0c2a30 !important; border: 1px solid #0e7490 !important; border-radius: 8px; padding: 14px 16px; margin: 14px 0; } .id-enc-warn p { color: #e2e8f0 !important; font-size: 14px; margin: 0; } Sealed Enclosure Performance: Pre-Calculated Results Using 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. The 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. D2: Dual 2 Ohm | Qts 0.807 | Fs 51 Hz | Vas 6.662 L Box Volume Qtc Fc F3 0.33 cu ftCompact / max power handling (250W) 1.056 66.7 Hz 51.3 Hz 0.53 cu ft Universal / balanced (200W max) 0.970 61.3 Hz 48.9 Hz 0.73 cu ftAudiophile / most extension (150W max) 0.928 58.6 Hz 47.8 Hz D4: Dual 4 Ohm | Qts 0.839 | Fs 51 Hz | Vas 6.191 L Box Volume Qtc Fc F3 0.33 cu ftCompact / max power handling (250W) 1.082 65.8 Hz 50.1 Hz 0.53 cu ft Universal / balanced (200W max) 0.997 60.6 Hz 47.7 Hz 0.73 cu ftAudiophile / most extension (150W max) 0.956 58.1 Hz 46.7 Hz D2 Frequency Response: Sealed -12dB -9dB -6dB -3dB 0dB 3dB 20Hz 30Hz 50Hz 100Hz 200Hz 0.33 cu ft (Qtc 1.056) 0.53 cu ft (Qtc 0.970) 0.73 cu ft (Qtc 0.928) D4 Frequency Response: Sealed -12dB -9dB -6dB -3dB 0dB 3dB 20Hz 30Hz 50Hz 100Hz 200Hz 0.33 cu ft (Qtc 1.082) 0.53 cu ft (Qtc 0.997) 0.73 cu ft (Qtc 0.956) Ported extension and power notes: 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. Run your own numbers in the Sealed Box Calculator. Ready to build? The Enclosures tab above lists the Proline X sealed enclosures we build specifically for 8 inch drivers, CNC-cut in Tullahoma, Tennessee. Show more