2004 Nissan Altima Speaker Sizes

The 2004 Nissan Altima factory audio system includes specific mounting locations, where the a-pillar accommodates a 1 inch speaker size, while the front door panel and rear door panel support 6.5 inch speakers, and the rear deck lid accepts 6x9 inch units. Compatible speaker types for a replacement upgrade project consist of tweeters, midbass drivers, and full-range units.

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

Speaker Details by Location
Location Size Type Notes
A-Pillar 1 Tweeter
  • Requires panel disassembly
  • Professional installation recommended
  • Low replacement priority
  • Replacement difficulty: high
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

2004 Nissan Altima Speaker Replacement Summary

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

Replacement difficulty:

Low: 3 Medium: 0 High: 1

Replacement priority:

High: 1 Medium: 2 Low: 1

2004 Nissan Altima Radio Slot Size (DIN)

DIN Type Size (inch) Size (mm) Notes
Single DIN or Double DIN 7"×2" or 7"×4" 180×50 or 180×100 Vehicle supports both radio sizes
  • Always measure the slot before purchasing a new radio
  • Check slot depth - it may vary

Additional Notes

  • The 2004 Nissan Altima factory audio system includes four distinct speaker locations with varying size requirements and functional capabilities.
  • A-pillar positions accommodate 1-inch tweeters, which suggests the factory configuration may have included dedicated high-frequency drivers for enhanced treble reproduction.
  • Both front and rear door panels accept 6.5-inch speakers that can function as either midbass drivers or full-range units, providing flexibility in system design approaches.
  • The rear deck lid location accepts 6x9-inch speakers designated for full-range operation, offering a larger cone area than the door-mounted units.
  • Door panel speakers might be considered a primary upgrade path given their mid-range sizing and dual compatibility with midbass or full-range configurations.
  • The presence of dedicated tweeter locations indicates the possibility of building a component speaker system rather than relying solely on coaxial designs.
  • Rear deck speakers with 6x9-inch dimensions typically provide enhanced bass response compared to smaller round speakers due to increased surface area.
  • The radio cavity supports both single DIN and double DIN head units, allowing for various aftermarket receiver installation options.
  • Upgrading to component speakers in the doors while utilizing the factory tweeter locations could maintain the original aesthetic while improving sound staging.
  • The combination of tweeter positions and multiple full-range locations suggests the factory system was designed with multi-driver coverage across the cabin.