{"product_id":"avt-6-5-inch-ported-road-glide-speaker-enclosure","title":"AVT 6.5-Inch Ported Fairing Speaker Enclosure for Road Glide — Pair","description":"\u003cp\u003e\u003cstrong\u003eThe punch starts behind the grille.\u003c\/strong\u003e AVT's 6.5-inch ported enclosure makes midbass part of the build from the start: speaker, enclosure, amplifier and filtering working together in the Road Glide fairing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e$525 per empty left\/right pair, including shipping.\u003c\/strong\u003e Made to order. Ships in 2–3 days. ABS in matte black \/ charcoal.\u003c\/p\u003e\n\u003cp\u003eThe contoured body and integrated acoustic port use the available fairing space. The documented development and installed-test speaker is the \u003cstrong\u003ePRV 6MR500-NDY-4, 4 ohm\u003c\/strong\u003e. Speakers are sold separately.\u003c\/p\u003e\n\u003ch2 id=\"engineering-development\"\u003eWhy the enclosure matters\u003c\/h2\u003e\n\u003cp\u003eThe enclosure is part of the acoustic system. During development, we compared the same aftermarket drivers at the same input in a compact sealed baseline and a proposed ported alignment. This isolates the effect of the enclosure in the model.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eModeled PRV 6MR500-NDY-4 example: +8.4 dB at 100 Hz and +7.8 dB at 125 Hz.\u003c\/strong\u003e Its modeled −3 dB point moved from 172 Hz to 103 Hz. The six-driver median was +8.4 dB at 100 Hz and +8.8 dB at 125 Hz.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHistorical development model, not a measured production gain.\u003c\/strong\u003e Same driver and electrical input; common 95 Hz second-order Butterworth high-pass filter; assumed 2.7 L net sealed baseline versus the historical approximately 105 Hz ported proposal. This does not compare the factory speaker against an aftermarket speaker.\u003c\/p\u003e\n\u003cfigure style=\"margin:20px 0\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-modeled-enclosure-comparison.png?v=1790033826\" target=\"_blank\" rel=\"noopener\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-modeled-enclosure-comparison.png?v=1790033826\" alt=\"Historical modeled 6.5-inch enclosure comparison: six drivers, assumed sealed baseline versus proposed ported alignment.\" loading=\"lazy\" style=\"display:block;width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eModeled enclosure comparison across six drivers. The useful result: airspace and port design can change midbass response while the driver and input stay the same.\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-modeled-enclosure-comparison.png?v=1790033826\" target=\"_blank\" rel=\"noopener\"\u003eOpen this chart full size\u003c\/a\u003e\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary style=\"cursor:pointer;text-decoration:underline\"\u003eShow \/ hide: Model conditions and enclosure-development detail\u003c\/summary\u003e\u003cp\u003eThe model's geometry has not been established as numerically identical to the current production enclosure. The historical proposal used 5.727 L gross volume, a 0.869 L port, 201 mm port centerline and 30.45 cm² throat. Net airspace changes with the driver's intrusion; the PRV example used 4.558 L net and a modeled 104.4 Hz alignment. These are development-study dimensions, not current-product dimensional specifications.\u003c\/p\u003e\n\u003cp\u003eThe study excludes compression, leakage, distortion and the motorcycle's acoustic transfer. The common 95 Hz filter is a comparison condition, not a full-power installation prescription. Physical development also included revisions to port restrictions and basket\/motor clearance so packaging and airflow were considered together.\u003c\/p\u003e\u003c\/details\u003e\n\u003ch2\u003eChoose the driver as part of the system\u003c\/h2\u003e\n\u003cp\u003eResponse shape, cone travel, port air speed and protection requirements matter together. A higher watt rating alone does not select the right speaker. The ten-driver study below shows those tradeoffs alongside the recorded fit status.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe PRV 6MR500-NDY-4 is the documented installed development driver.\u003c\/strong\u003e The 6MB550FT-4 was an acoustic reference but was rejected for fit. Other candidates still require exact fit checks; this is not a drop-in compatibility list.\u003c\/p\u003e\n\u003cfigure style=\"margin:20px 0\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-modeled-driver-selection.png?v=1790033837\" target=\"_blank\" rel=\"noopener\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-modeled-driver-selection.png?v=1790033837\" alt=\"Historical ten-driver model comparing response, cone travel, power screening and fit status.\" loading=\"lazy\" style=\"display:block;width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eHistorical ten-driver model using the same proposed alignment and common 95 Hz filter as the lead comparison. “Safe W” and “safe floor” are model-screen labels, not tested ratings or recommended amplifier settings.\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-modeled-driver-selection.png?v=1790033837\" target=\"_blank\" rel=\"noopener\"\u003eOpen this chart full size\u003c\/a\u003e\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary style=\"cursor:pointer;text-decoration:underline\"\u003eShow \/ hide: More comparisons: cone motion, port speed and output\u003c\/summary\u003e\n\u003cp\u003eThe earlier motion study illustrates the tradeoff between reduced cone travel around the alignment region and increased port air speed. It does not establish zero port noise or protection below tuning.\u003c\/p\u003e\n\u003cfigure style=\"margin:20px 0\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-modeled-motion-port-speed.png?v=1790033841\" target=\"_blank\" rel=\"noopener\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-modeled-motion-port-speed.png?v=1790033841\" alt=\"Historical 6.5-inch analytical cone-motion and port-speed comparison.\" loading=\"lazy\" style=\"display:block;width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eEarlier CAD-based analytical screen: 5.727 L gross, 0.835 L port, 173.52 mm centerline, 33.83 cm² throat, driver-specific intrusion, assumed loss Q7 and common 95 Hz \/ 12 dB high-pass filter. This is a different historical alignment from the lead chart. Top: rated-power travel as a percentage of published one-way Xmax. Bottom: port speed at each driver's excursion-limited model power.\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-modeled-motion-port-speed.png?v=1790033841\" target=\"_blank\" rel=\"noopener\"\u003eOpen this chart full size\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-modeled-output-comparison.png?v=1790033844\" target=\"_blank\" rel=\"noopener\"\u003eOpen the companion response and modeled-output comparison\u003c\/a\u003e. Same earlier geometry as the motion study. Absolute output depends on sensitivity normalization and excludes compression, leakage, amplifier limits and motorcycle transfer. The retained PRV sensitivity-reference conflict can shift absolute comparisons by about 3 dB; it does not change the same-driver relative gain in the lead chart. Use this as development context, not an enclosure SPL or wattage rating.\u003c\/p\u003e\u003c\/details\u003e\n\u003ch2\u003eDeveloped on the motorcycle\u003c\/h2\u003e\n\u003cp\u003eThe 6.5-inch prototype was installed and evaluated with the PRV 6MR500-NDY-4. Development included separate speaker-cone and port response measurements, rider-position response recordings, and left\/right distortion recordings. These checks informed the design alongside the enclosure modeling.\u003c\/p\u003e\n\u003cp\u003eThe installed photographs show the enclosure's mounting arrangement and relationship to surrounding equipment.\u003c\/p\u003e\n\u003cfigure style=\"margin:20px 0\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-prototype-rider-measurement.png?v=1790033857\" target=\"_blank\" rel=\"noopener\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-prototype-rider-measurement.png?v=1790033857\" alt=\"August 24, 2026 PRV 6MR500-NDY-4 prototype rider-position measurements. Actual crossover 90 Hz, 12 dB per octave.\" loading=\"lazy\" style=\"display:block;width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eMeasured prototype evidence — August 24, 2026. PRV 6MR500-NDY-4 left\/right rider-position response, 1\/12 smoothing. Actual crossover: 90 Hz \/ 12 dB per octave; the saved HPF95 labels are stale. This is an installed development capture, not a maximum-output or factory-enclosure A\/B test.\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-65-prototype-rider-measurement.png?v=1790033857\" target=\"_blank\" rel=\"noopener\"\u003eOpen this chart full size\u003c\/a\u003e\u003c\/p\u003e\u003ch2\u003eVehicle and speaker fitment\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFor motorcycles using the same factory speaker enclosure as the 2017 Harley-Davidson Road Glide.\u003c\/strong\u003e Confirm the configuration with AVT if your motorcycle has a replacement fairing or previous custom audio installation.\u003c\/p\u003e\n\u003cp\u003eFor a speaker other than the documented PRV pairing, check the exact frame, mounting depth, magnet, terminals and mounting-hole arrangement with AVT before ordering. A nominal 6.5-inch size does not establish fitment.\u003c\/p\u003e\n\u003ch2\u003eWhat's included\u003c\/h2\u003e\n\u003cp\u003eOne empty left\/right enclosure pair. \u003cstrong\u003eReuse the motorcycle's original enclosure mounting hardware.\u003c\/strong\u003e Speakers, tweeters, grilles, amplifiers, processors, wiring, connectors, gaskets and mounting hardware are not included. Pictured audio equipment is shown for installation context only.\u003c\/p\u003e\n\u003ch2\u003eInstallation and system setup\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe 6.5-inch enclosures do not require modification to the inner fairing vent outlet.\u003c\/strong\u003e Check speaker seating, sealing, wiring, terminal and port clearance before reassembling the fairing.\u003c\/p\u003e\n\u003cp\u003eSelect amplification and high-pass protection for the exact speaker and complete system. Speaker power and impedance ratings belong to the installed speaker, not the empty enclosure. Follow the speaker manufacturer's guidance and confirm gain and filter settings during installation.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/avt-enclosures\"\u003eCompare the AVT enclosure sizes\u003c\/a\u003e, or contact AVT with your motorcycle and exact speaker model before ordering.\u003c\/p\u003e\n","brand":"American V Twin","offers":[{"title":"Default Title","offer_id":48404524466313,"sku":"AVT-RG-ENCL-65","price":525.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/8930\/5993\/files\/avt-rg-encl-65-image-1.png?v=1790029282","url":"https:\/\/americanvtwinparts.com\/products\/avt-6-5-inch-ported-road-glide-speaker-enclosure","provider":"American V Twin","version":"1.0","type":"link"}