2018 Nissan Altima Speaker Sizes

The 2018 Nissan Altima factory audio system includes specific mounting locations. The dashboard accommodates a 3.5 inch speaker size, while the front door panel and rear door panel accept 6.5 inch units. The rear deck lid accommodates 6x9 inch units. Compatible speaker types for a replacement or upgrade consist of full-range and midbass drivers.

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

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.