2018 Mazda 3 Speaker Sizes

The 2018 Mazda 3 speaker size chart details factory audio specifications and locations for replacement or aftermarket upgrade installations. Information covers speakers in front door panel, center dash, dashboard, rear deck lid, cargo area, and rear door panel positions. Data includes specifications for factory system components to assist with aftermarket audio upgrades.

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Speaker Details by Location
Location Size Type Notes
Cargo Area 6.75 Midbass / Full-Range
  • Ample working space
  • Medium replacement priority
  • Replacement difficulty: low
Center Dash 3.5 Full-Range
  • Requires dashboard disassembly
  • Medium replacement priority
  • Replacement difficulty: medium
Dashboard 3.5 Full-Range
  • Requires panel disassembly
  • Medium replacement priority
  • Replacement difficulty: medium
Front Door Panel 6.75 Midbass / Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Front Door Panel 1 Tweeter
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Front Door Panel 5.25 Midbass / Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Rear Deck Lid 3.5 Full-Range
  • Access through trunk
  • Medium replacement priority
  • Replacement difficulty: low
Rear Door Panel 6.75 Midbass / Full-Range
  • Standard installation
  • Medium replacement priority
  • Replacement difficulty: low
Rear Door Panel 6x8 Full-Range
  • Standard installation
  • Medium replacement priority
  • Replacement difficulty: low

2018 Mazda 3 Speaker Replacement Summary

9 total positions
7 easy to replace
4 high priority
0 professional only

Replacement difficulty:

Low: 7 Medium: 2 High: 0

Replacement priority:

High: 4 Medium: 5 Low: 0

Additional Notes

  • The front door panels in the 2018 Mazda 3 accommodate multiple speaker sizes, including 1-inch tweeters, 5.25-inch components, and 6.75-inch drivers, suggesting a factory component system configuration that separates high and mid-range frequencies.
  • Replacement priorities may differ based on listening preferences, as the 6.75-inch front door speakers handle midbass and full-range duties while the dedicated 1-inch tweeters manage higher frequencies.
  • The rear door panels feature both 6.75-inch and 6x8-inch mounting options, indicating possible variations in factory configurations or aftermarket flexibility for oval-shaped drivers.
  • Full-range speakers at 3.5 inches occupy the center dash, dashboard, and rear deck lid positions, potentially contributing to soundstage width and rear fill rather than primary audio output.
  • Component speaker systems with separate tweeters and midbass drivers could maintain the factory's frequency separation approach in the front doors, while coaxial full-range units might simplify rear door installations.
  • The cargo area 6.75-inch location offers midbass or full-range compatibility, which may serve as supplemental low-frequency reinforcement depending on the factory audio package.
  • Sound quality improvements might be more noticeable when replacing the larger 5.25-inch or 6.75-inch front door speakers compared to the smaller 3.5-inch units, given their greater cone area and frequency range capabilities.
  • Tweeter replacement at the 1-inch front door location could enhance high-frequency clarity without requiring modifications to midbass components, allowing for incremental system upgrades.