BMW 528e Speaker Size
Speaker size, type, and location chart for BMW 528e models from 1982 to 1988 production years.
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Front Kick Panel Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 1982 - 1988 | Full-Range | 4x6 |
Rear Deck Lid Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 1982 - 1988 | Full-Range | 4x6 |
BMW 528e Speaker FAQ
What speakers should I replace first in my BMW 528e?
Replace the front kick panel speakers first. These 4 x 6 inch coaxials handle most of your stereo imaging and vocal clarity. The front location gives you better soundstage control than the rear deck speakers. You'll notice immediate improvement in dialogue and instrument separation. Rear deck speakers can wait - they mostly fill in ambient sound anyway.
Can I upgrade from coaxial to component speakers in my BMW 528e?
The 4 x 6 inch openings limit your component options significantly. Most component systems use round drivers. You'd need custom mounting adapters or door modifications. Coaxial speakers actually work better here - the full-range design handles the odd mounting angles in kick panels and rear deck better than separate tweeters would. Stick with quality coaxials around 50-80 watts RMS.
Why does my BMW 528e have the same speaker size front and rear?
BMW used 4 x 6 inch speakers throughout for cost efficiency and uniform sound dispersion. The kick panel placement gives you near-field listening while rear deck provides cabin fill. Same impedance too - likely 4 ohms. This setup actually balances well if you choose speakers with similar frequency response curves. The rear position naturally rolls off highs due to distance and angle.
What power handling should I look for in BMW 528e replacement speakers?
Target 40-75 watts RMS for both locations. The kick panels can handle slightly more power since they're closer to your ears - maybe 60-80 watts. Rear deck speakers don't need as much since they're mainly for ambience. Keep sensitivity ratings similar between front and rear, probably 87-91 dB. Higher sensitivity helps with the limited amplifier power in older head units.
Do 4 x 6 inch speakers in the BMW 528e produce enough bass?
Not really. The small driver area limits low-end output significantly. You'll get decent mid-bass around 80-120 Hz but nothing below that. Consider adding a small subwoofer if you want real bass extension. The coaxial design helps somewhat - the tweeter doesn't steal cone area like in some cheaper speakers. But physics is physics. 4 x 6 inch just can't move enough air for true bass response.