BMW 750iL Speaker Size

Front Door Panel Speaker

Rear Door Panel Speaker

Rear Deck Lid Speaker

BMW 750iL Speaker FAQ

What speakers should I upgrade first in my BMW 750iL?

Start with the front door panel speakers - they handle most of your music's detail. The 5.25 inch midrange drivers carry vocals and instruments from roughly 200Hz to 4kHz. Your 750iL likely has 1 inch tweeters handling everything above that. Replace the 5.25s first since they work hardest. Look for speakers with 4-ohm impedance and 50-75 watts RMS power handling. The tweeters can wait unless they're blown or sound harsh.

Can I install component speakers in my BMW 750iL door panels?

Yes, most 750iL configurations support component speakers in both front and rear doors. Component systems separate the tweeter from the midrange driver - usually improving soundstage width. The front doors often have dedicated tweeter locations plus the main 5.25 inch or 6x8 inch opening. Mount the crossover networks somewhere accessible but protected from moisture. You might need to run new speaker wire depending on your factory setup. Component speakers typically need 30-60 watts per channel to perform well.

What's the difference between the 6x8 and 5.25 inch speakers in my BMW 750iL?

The 6x8 speakers appeared in earlier 750iL models and provide more cone area - roughly 30 square inches versus 22 for a 5.25 inch round speaker. More cone area usually means better bass response down to around 60-80Hz. But the 5.25 inch speakers might fit better and offer more upgrade options. Check your door panel carefully since some years mixed different sizes. The 6x8 format isn't as common in aftermarket speakers, so you'll have fewer choices.

Should I use the rear deck speakers in my BMW 750iL?

The rear deck 5.25 inch speakers mainly add ambiance and rear passenger coverage. They're not critical for front seat listening. If you're installing a subwoofer, you might disconnect these entirely to avoid phase cancellation. The rear deck location can create weird reflections off the rear window. Some people prefer using them for high-pass filtered content only - maybe above 150Hz. Test with and without them connected to see what sounds better in your specific 750iL.

Why does my BMW 750iL have so many small speakers instead of larger ones?

BMW's approach splits frequency ranges across multiple specialized drivers. The 1 inch tweeters handle treble above 3-4kHz. The 2 inch midrange covers upper midrange frequencies. The main 5.25 or 6x8 drivers handle everything else down to maybe 80Hz. This design can sound more detailed than single full-range speakers, but it depends on proper crossover tuning. Each speaker operates in its optimal frequency range instead of trying to do everything. The downside? More complexity and potential points of failure.