2018 BMW 328d Speaker Sizes
The 2018 BMW 328d factory audio system features specific mounting locations across the cabin. Center dash, front door panel, rear deck lid, and rear door panel accommodate 1 inch speakers alongside a 4 inch speaker size, while below seats support 8 inch units. Compatible speaker types for replacement and upgrade include tweeter, midrange, and subwoofer.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Below Seats | 8 | Subwoofer |
|
| Center Dash | 1 | Tweeter |
|
| Center Dash | 4 | Midrange |
|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 4 | Midrange |
|
| Rear Deck Lid | 1 | Tweeter |
|
| Rear Deck Lid | 4 | Midrange |
|
| Rear Door Panel | 1 | Tweeter |
|
| Rear Door Panel | 4 | Midrange |
|
2018 BMW 328d Speaker Replacement Summary
9
total positions
6
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 6 Medium: 3 High: 0Replacement priority:
High: 2 Medium: 7 Low: 0Additional Notes
- The 2018 BMW 328d audio system incorporates a multi-driver configuration with separate tweeters, midrange speakers, and a dedicated subwoofer positioned across various cabin locations.
- Tweeters measuring 1 inch are distributed throughout the interior, with placements in the center dash, front door panels, rear deck lid, and rear door panels to handle high-frequency reproduction.
- Midrange drivers of 4 inches occupy the same four locations as the tweeters, suggesting a component-style speaker arrangement that separates frequency ranges across discrete drivers.
- An 8 inch subwoofer located below the seats provides low-frequency output, indicating factory installation of bass reinforcement in the stock audio configuration.
- Replacement of the midrange drivers could potentially offer the most noticeable sonic improvement, as these 4 inch units handle the critical vocal and instrumental frequency range where most musical content resides.
- The tweeter locations in multiple zones suggest an attempt at creating a dispersed soundstage, though aftermarket alternatives with higher sensitivity ratings might enhance clarity and detail retrieval.
- Component speaker sets designed for these specifications would typically include crossovers to properly divide frequencies between the 1 inch tweeters and 4 inch midrange units.
- The under-seat subwoofer placement represents a space-efficient approach to bass extension, though this location may limit output potential compared to larger enclosures in trunk-mounted configurations.