BMW 440i xDrive Gran Coupe Speaker Size
Speaker size, type, and location chart for BMW 440i xDrive Gran Coupe models from 2017 to 2018 production years.
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Rear Side Panel Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2018 | Tweeter | 1 |
| 2018 | Midrange | 4 |
Center Dash Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2017 - 2018 | Tweeter | 1 |
| 2017 - 2018 | Midrange | 4 |
Front Door Panel Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2017 - 2018 | Tweeter | 1 |
| 2017 - 2018 | Midrange | 4 |
Rear Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2017 - 2018 | Tweeter | 1 |
| 2017 - 2018 | Midrange | 4 |
Rear Door Panel Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2017 | Tweeter | 1 |
| 2017 | Midrange | 4 |
Below Seats Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2017 - 2018 | Subwoofer | 8 |
BMW 440i xDrive Gran Coupe Speaker FAQ
Which speakers should I replace first in my BMW 440i xDrive Gran Coupe for the biggest sound improvement?
Replace the front door panel component speakers first. These 4-inch coaxial components handle most of your midrange frequencies and vocals - they're doing the heavy lifting for sound quality. The front tweeters work with them, so you might want to upgrade both together. Actually, the center dash speakers probably get decent use too since they're positioned right at ear level. But start with the fronts. You'll notice the difference immediately, especially if you're coming from factory speakers that might be pushing 50-75 watts RMS.
What's the difference between the coaxial component and coaxial full-range speakers in the BMW 440i xDrive Gran Coupe?
Component speakers separate the tweeter and woofer - they're designed to work together but as separate units. The front door setup uses this configuration. Full-range coaxials have everything built into one speaker unit. Your rear doors and center dash use full-range types. Components typically sound cleaner because you can position the tweeter separately, but they're more complex to install. The 4-inch size limits how much bass either type can produce though. Most aftermarket options will handle 20-30 watts RMS comfortably, some go up to 60 watts.
Can I upgrade the 8-inch subwoofer below the seats in my BMW 440i xDrive Gran Coupe?
Yes, but it's tricky. That under-seat location is pretty confined - you're limited by height and mounting points. Factory subs there usually run around 100-150 watts RMS. Check your available depth first. Most 8-inch aftermarket subs need at least 3-4 inches of clearance. Shallow-mount designs might work better. The BMW 440i xDrive Gran Coupe's factory amplifier might need bypassing too, depending on what you install. Some people just add a powered sub in the trunk instead - easier installation, more power options.
Why does my BMW 440i xDrive Gran Coupe have so many 1-inch tweeters?
BMW spreads tweeters around to create better soundstage imaging. Front door, center dash, rear doors, sometimes rear side panels - it's about creating that surround effect. The 1-inch size is pretty standard for tweeters. They handle frequencies above 3000-4000 Hz typically. Thing is, having multiple tweeters can sometimes create phase issues if they're not properly timed. The factory system probably has digital processing to manage this. When upgrading, you might want to focus on the front tweeters first since those affect stereo imaging the most.