2013 BMW 550i GT Speaker Sizes

The 2013 BMW 550i GT factory audio system includes specific locations configured for various components. C-pillar, center dash, front door panel, and rear door panel locations accept a 1 inch speaker size, while c-pillar, center dash, front door panel, and rear door panel locations accommodate 4 inch units. Below seats locations support 8 inch units. Compatible speaker types for replacement and upgrade include tweeter, midrange, and subwoofer.

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
C-Pillar	1	Tweeter	Complex interior disassembly Professional installation recommended Low replacement priority Replacement difficulty: high
C-Pillar	4	Midrange	Complex interior disassembly Professional installation recommended Low replacement priority Replacement difficulty: high
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 Door Panel	1	Tweeter	Standard installation Medium replacement priority Replacement difficulty: low
Rear Door Panel	4	Midrange	Standard installation Medium replacement priority Replacement difficulty: low

2013 BMW 550i GT Speaker Replacement Summary

9 total positions

4 easy to replace

2 high priority

2 professional only

Replacement difficulty:

Low: 4 Medium: 3 High: 2

Replacement priority:

High: 2 Medium: 5 Low: 2

2013 BMW 550i GT Radio Slot Size (DIN)

DIN Type	Size (inch)	Size (mm)	Notes
Single DIN	7"×2"	180×50	Standard size for basic car radios with small display or no display

Always measure the slot before purchasing a new radio
Check slot depth - it may vary

Additional Notes

The 2013 BMW 550i GT appears to utilize a component speaker system design with dedicated tweeters and midrange drivers distributed across multiple cabin locations rather than conventional full-range coaxial speakers.
Tweeter positions include the C-pillar, center dash, front door panel, and rear door panel, all accommodating 1-inch units, suggesting a focus on high-frequency dispersion throughout the listening environment.
Midrange drivers occupy the same four locations as the tweeters but at 4-inch sizing, which may provide dedicated mid-frequency reproduction separate from the tweeter elements.
The below-seats location houses 8-inch subwoofer units, positioning low-frequency drivers in a less intrusive area while potentially maintaining bass output for rear seat occupants.
Replacement of the factory tweeters might offer noticeable improvements in vocal clarity and high-frequency detail, particularly for listeners in both front and rear seating positions.
Upgrading the 4-inch midrange speakers could enhance instrument separation and midrange warmth, as these drivers likely handle the critical frequency range where most musical content resides.
The factory Single DIN radio configuration may limit aftermarket head unit options compared to Double DIN openings, though adapter solutions sometimes exist for specific installations.
Component speaker upgrades typically require attention to impedance matching and power handling to maintain compatibility with factory amplification systems if present.
The distribution of tweeters across four distinct zones suggests the factory system may have been designed with surround-sound or immersive audio characteristics in mind.
Subwoofer replacement in the below-seats location might require consideration of mounting depth and enclosure volume to ensure proper fitment without interfering with seat adjustment mechanisms.