BMW M240i xDrive Speaker Size
Speaker size, type, and location chart for BMW M240i xDrive models from 2017 to 2018 production years.
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Rear Side Panel Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2017 - 2018 | Tweeter | 1 |
| 2017 - 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 Deck Lid Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2017 - 2018 | Tweeter | 1 |
| 2017 - 2018 | Midrange | 4 |
Below Seats Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2017 - 2018 | Subwoofer | 8 |
BMW M240i xDrive Speaker FAQ
Which speakers should I upgrade first in my BMW M240i xDrive for the biggest sound improvement?
Start with the front door panel components. Replace both the 1-inch tweeters and 4-inch coaxial components together since they work as a matched system. The front stage handles most of your critical listening - vocals, instruments, imaging. You'll hear the difference immediately. Why front first? Your ears naturally focus forward while driving. The BMW M240i xDrive's front door placement gives you the best stereo separation too. Budget around 75-100 watts RMS per channel for the 4-inch components, 25-50 watts for the tweeters. After front doors, consider the 8-inch subwoofer below seats. That covers your low-end foundation around 20-80 Hz. The rear deck and side panel speakers can wait - they're mostly for fill and ambiance.
What's the difference between the coaxial component and coaxial full-range speakers in the BMW M240i xDrive?
Component coaxials separate the tweeter and woofer into distinct drivers with a crossover network. The 4-inch components in your front doors pair with separate 1-inch tweeters for better frequency separation. You get cleaner highs, more detailed mids. Full-range coaxials pack everything into one unit - tweeter mounted on top of the woofer cone. Found in your rear deck lid, rear side panels, and center dash locations. Simpler installation, but the sound can get muddy since frequencies overlap. Think of components as your precision tools, full-range as your workhorses. The BMW M240i xDrive uses components up front where sound quality matters most, full-range for rear fill. Impedance typically runs 4-8 ohms for both types.
Can I replace just the tweeters without changing the 4-inch speakers in my BMW M240i xDrive?
Technically yes, but you might create more problems. The 1-inch tweeters and 4-inch components share crossover duties - usually around 3000-4000 Hz crossover point. Mismatched sensitivity levels mean one driver overpowers the other. If your BMW M240i xDrive's factory tweeters died, sure, replace them with similar specs. Look for 4-8 ohm impedance, similar power handling. But for upgrades? Do the whole component system together. The center dash and rear locations use separate tweeter/full-range pairs too. Same principle applies - they're voiced to work together. Independent upgrades can shift your soundstage weirdly or create frequency gaps you didn't expect.