2018 Nissan Altima Speaker Sizes

The 2018 Nissan Altima speaker size chart provides factory audio specifications for all speaker locations throughout the vehicle. Information includes speaker sizes and placement details for dashboard, front door panel, rear door panel, and rear deck lid positions. These specifications assist with aftermarket replacement and upgrade planning for the factory audio system.

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Speaker Details by Location
Location Size Type Notes
Dashboard 3.5 Full-Range
  • Requires panel disassembly
  • Medium replacement priority
  • Replacement difficulty: medium
Front Door Panel 6.5 Midbass / Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Rear Deck Lid 6x9 Full-Range
  • Access through trunk
  • Medium replacement priority
  • Replacement difficulty: low
Rear Door Panel 6.5 Midbass / Full-Range
  • Standard installation
  • Medium replacement priority
  • Replacement difficulty: low

2018 Nissan Altima Speaker Replacement Summary

4 total positions
3 easy to replace
1 high priority
0 professional only

Replacement difficulty:

Low: 3 Medium: 1 High: 0

Replacement priority:

High: 1 Medium: 3 Low: 0

Additional Notes

  • The 2018 Nissan Altima features four distinct speaker locations with varying sizes and compatible driver types throughout the cabin.
  • Dashboard positions accommodate 3.5 inch full-range drivers, which typically handle mid and high frequencies from a forward-facing location.
  • Both front and rear door panels share 6.5 inch mounting provisions that accept either midbass or full-range speakers, offering flexibility in component selection.
  • The rear deck lid contains 6x9 inch openings designed for full-range drivers, a common oval format often associated with higher output potential compared to round speakers of similar surface area.
  • Door panel speakers may represent the primary replacement priority given their versatile compatibility with both midbass and full-range configurations.
  • A component speaker system could utilize the 6.5 inch door locations for dedicated midbass drivers while the dashboard positions handle tweeter duties separately.
  • The rear deck full-range speakers might contribute to overall soundstage depth when positioned behind the listener.
  • Upgrading from factory full-range speakers to dedicated midbass drivers in the door panels could potentially improve low-frequency response and reduce distortion.
  • The specification pattern suggests a conventional four-way configuration with smaller drivers supplementing larger ones across the frequency spectrum.
  • Speaker replacements would likely need to match the specified sizes precisely to fit existing mounting brackets and grilles without modification.