American V Twin
Made to order. Ships in 2–3 days.
Price is per empty pair, including shipping. Stock mounting hardware is reused.
8-inch only: a small modification to the inner fairing vent outlet is required. The 6.5-inch version does not require that modification.
Vehicle fitment
2015–2023 Road Glide / Special; 2016–2019 Ultra; 2020–2024 Limited; 2022–2023 ST; 2015–2016 CVO Ultra; 2018–2022 CVO Road Glide; 2022–2023 CVO Limited; 2023–2025 Road Glide 3; 2024–2025 Road Glide Police.
Stock conventional fairings only. Skyline fairings are excluded. See the complete model, year and trim list below.
The punch starts behind the grille. 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.
$525 per empty left/right pair, including shipping. Made to order. Ships in 2–3 days. ABS in matte black / charcoal.
The contoured body and integrated acoustic port use the available fairing space. The documented development and installed-test speaker is the PRV 6MR500-NDY-4, 4 ohm. Speakers are sold separately.
The 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.
Modeled PRV 6MR500-NDY-4 example: +8.4 dB at 100 Hz and +7.8 dB at 125 Hz. 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.
Historical development model, not a measured production gain. 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.
The 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.
The 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.
Response 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.
The PRV 6MR500-NDY-4 is the documented installed development driver. 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.
The 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.
Open the companion response and modeled-output comparison. 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.
The 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.
The installed photographs show the enclosure's mounting arrangement and relationship to surrounding equipment.
Fits the Harley-Davidson models below with their original conventional Road Glide upper fairing and factory speaker-enclosure mounting arrangement (OEM right 76000458 / left 76000460).
| Harley-Davidson model | Years | Model code / trim |
|---|---|---|
| Road Glide | 2015–2023 | FLTRX |
| Road Glide Special | 2015–2023 | FLTRXS; 2023 FLTRXSANV Anniversary |
| Road Glide Ultra | 2016–2019 | FLTRU |
| Road Glide Limited | 2020–2024 | FLTRK |
| Road Glide ST | 2022–2023 | FLTRXST |
| CVO Road Glide Ultra | 2015–2016 | FLTRUSE |
| CVO Road Glide | 2018–2022 | FLTRXSE |
| CVO Road Glide Limited | 2022–2023 | 2022 FLTRKSE; 2023 FLTRKSEANV Anniversary |
| Road Glide 3 | 2023–2025 | FLTRT |
| Road Glide Police | 2024–2025 | FLTRXP |
Does not fit the redesigned Skyline fairing: 2023-and-newer CVO Road Glide (FLTRXSE), 2024-and-newer Road Glide (FLTRX) and CVO Road Glide ST (FLTRXSTSE), 2025-and-newer CVO Road Glide RR (FLTRXRRSE), or 2026 Road Glide Limited, Road Glide 3 and Road Glide Police. Earlier 2013-and-older Road Glides are also outside this application.
Aftermarket or swapped fairings and custom audio installations require an individual fit check. Vehicle fitment does not establish speaker fitment: confirm the exact speaker frame, mounting depth, magnet, terminals and mounting-hole pattern before ordering.
For 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.
One empty left/right enclosure pair. Reuse the motorcycle's original enclosure mounting hardware. Speakers, tweeters, grilles, amplifiers, processors, wiring, connectors, gaskets and mounting hardware are not included. Pictured audio equipment is shown for installation context only.
The 6.5-inch enclosures do not require modification to the inner fairing vent outlet. Check speaker seating, sealing, wiring, terminal and port clearance before reassembling the fairing.
Select 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.
Compare the AVT enclosure sizes, or contact AVT with your motorcycle and exact speaker model before ordering.
AMERICAN V TWIN / AVT ENCLOSURES
Explore the other size or talk with AVT about the complete build. Each enclosure has its own application and speaker-clearance requirements.
$525 per empty pair including shipping. Matte black / charcoal ABS. Made to order; ships in 2–3 days.
No inner-fairing vent-outlet modification required.
One enclosure shown; sold as a pair.
$575 per empty pair including shipping. Matte black / charcoal ABS. Made to order; ships in 2–3 days.
Requires a small inner-fairing vent-outlet modification.
One enclosure shown; sold as a pair.
Compare the two enclosure sizes, check the application and plan the speaker pairing with AVT.
