2017 BMW M4 Speaker Sizes

The 2017 BMW M4 factory audio system features specific location dimensions where center dash, front door panel, rear, and rear side panel locations accommodate 1 inch speakers and 4 inch units, while below seats locations support an 8 inch speaker size. Available compatible speaker types for replacement and upgrade projects include tweeters, midrange units, and subwoofers.

Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.

Speaker Details by Location
Location	Size	Type	Notes
Below Seats	8	Subwoofer	Very limited height clearance Medium replacement priority Replacement difficulty: medium
Center Dash	1	Tweeter	Requires dashboard disassembly Medium replacement priority Replacement difficulty: medium
Center Dash	4	Midrange	Requires dashboard disassembly Medium replacement priority Replacement difficulty: medium
Front Door Panel	1	Tweeter	Standard installation High replacement priority Replacement difficulty: low
Front Door Panel	4	Midrange	Standard installation High replacement priority Replacement difficulty: low
Rear	1	Tweeter	Secondary sound location Medium replacement priority Replacement difficulty: medium
Rear	4	Midrange	Secondary sound location Medium replacement priority Replacement difficulty: medium
Rear Side Panel	1	Tweeter	Requires trim removal Medium replacement priority Replacement difficulty: medium
Rear Side Panel	4	Midrange	Requires trim removal Medium replacement priority Replacement difficulty: medium

2017 BMW M4 Speaker Replacement Summary

9 total positions

2 easy to replace

2 high priority

0 professional only

Replacement difficulty:

Low: 2 Medium: 7 High: 0

Replacement priority:

High: 2 Medium: 5 Low: 2

Additional Notes

The 2017 BMW M4 factory audio system utilizes a multi-driver configuration with dedicated tweeters, midrange speakers, and subwoofers distributed across multiple locations throughout the cabin.
Tweeters measuring 1 inch are positioned in four distinct locations: the center dash, front door panels, rear area, and rear side panels, suggesting a focus on high-frequency dispersion.
Midrange drivers at 4 inches occupy the same four locations as the tweeters, indicating a component-style setup rather than full-range coaxial speakers.
The subwoofer installation below the seats consists of an 8 inch driver, which may provide bass reinforcement without consuming trunk space.
Replacing the tweeters and midrange speakers with aftermarket component sets could potentially enhance clarity and staging, though matching impedance and sensitivity ratings would be advisable.
The separate tweeter and midrange configuration allows for frequency-specific upgrades, where one could address high-frequency detail independently from midrange warmth and presence.
Aftermarket subwoofer options in the 8 inch category might offer improved low-frequency extension and impact compared to the factory unit, particularly shallow-mount designs suited for under-seat placement.
The multiple midrange locations throughout the cabin suggest that sound staging and rear passenger audio quality were considerations in the original system design.