Description
SMS Precision BMW F30 100mm Door Speaker Adapter Rings
Sale unit: Sold as a matched pair for the selected door location, or as a four-adapter complete set.
The BMW F30 uses a factory speaker mounting interface that is not the same thing as a universal round opening. These SMS Precision adapters retain the vehicle-side mounting geometry and provide a proper mounting surface for compatible 100 mm / 4-inch-class aftermarket speakers.
Made to order in-house from ASA. The BMW-side geometry stays fixed; the speaker opening is produced to the selected or verified cutout used for the order.
Available Configurations
- Front door pair
- Rear door pair
- Complete front + rear set
Adapters only. Speakers, wiring, hardware, foam, gasket material, and sound treatment are not included.
Speaker Opening
Nominal 100 mm / 4-inch size does not guarantee an identical cutout across every speaker. When the exact speaker model is available in the SMS fitment database, the opening can be produced from its verified published cutout. Otherwise, provide the required cutout measurement.
Vehicle-clearance responsibility: final basket, magnet, terminal, mounting-depth, window/regulator, grille, and interior-panel clearance remain the responsibility of the buyer or installer.
This is a made-to-order SMS Precision product. Orders cannot be canceled or refunded after production begins, except where applicable law requires otherwise.