BMW Alpina B7 xDrive Speaker Size
Speaker size, type, and location chart for BMW Alpina B7 xDrive models from 2011 to 2018 production years.
As an Amazon Associate, we may earn a commission from purchases made through links marked. Read more in our disclaimer.
Center Dash Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2011 - 2018 | Tweeter | 1 |
| 2011 - 2018 | Midrange | 4 |
Front Door Panel Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2011 - 2018 | Tweeter | 1 |
| 2011 - 2018 | Midrange | 4 |
Rear Door Panel Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2013 - 2018 | Tweeter | 1 |
| 2013 - 2018 | Midrange | 4 |
Rear Deck Lid Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2011 - 2018 | Tweeter | 1 |
| 2011 - 2018 | Midrange | 4 |
Below Seats Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 2011 - 2018 | Subwoofer | 8 |
BMW Alpina B7 xDrive Speaker FAQ
Which speakers should I upgrade first in my BMW Alpina B7 xDrive for the biggest sound improvement?
Start with the front door panel speakers - the 4 inch coaxial components and 1 inch tweeters. These handle most of your midrange and vocal frequencies. The front door location puts them closest to your ears, so upgrades here create the most noticeable difference. Look for components rated around 50-75 watts RMS with 4-ohm impedance. The separate tweeter design in the BMW Alpina B7 xDrive front doors allows for better frequency separation than coaxials... though you'll need to match the crossover points carefully.
What's the difference between the coaxial speakers in different locations of my BMW Alpina B7 xDrive?
Your front doors use component coaxials while rear doors and center dash use full-range coaxials. Component types separate the tweeter physically - better imaging but more complex installation. Full-range coaxials combine everything in one unit. The 4 inch size limits bass response regardless of type, typically rolling off around 100-120 Hz. Center dash speakers mainly fill in dialogue and vocals. Rear door speakers provide ambient fill... though passenger positioning affects their contribution significantly.
Can I replace the 8 inch subwoofer under the seats in my BMW Alpina B7 xDrive?
Yes, but the below-seat location creates specific challenges. Space constraints limit your options - most aftermarket 8 inch subs won't fit the BMW Alpina B7 xDrive mounting configuration. You'll need speakers with shallow mounting depth, typically under 3 inches. Power handling around 100-200 watts RMS works well. The factory enclosure volume affects bass response... sealed designs perform differently than ported ones. Check the impedance - BMW often uses 2-ohm loads that some aftermarket amps can't handle properly.
Why does my BMW Alpina B7 xDrive have so many 1 inch tweeters in different locations?
The multiple tweeter setup creates a wider soundstage and compensates for the luxury cabin's sound absorption. Front door tweeters handle primary high-frequency imaging. Center dash tweeters fill the middle zone between left and right channels. Rear deck tweeters provide ambient highs for rear passengers... though their effectiveness depends on seating position. Each location might use different crossover points - typically 3-5 kHz range. When upgrading, maintaining similar frequency response prevents tonal imbalances across the BMW Alpina B7 xDrive cabin.