2004 Pontiac GTO Speaker Sizes

A speaker size chart for the 2004 Pontiac GTO displays factory audio system specifications and locations for replacement or aftermarket upgrade purposes. Information covers speakers in the front door panel, rear, and rear deck lid positions. Data includes specifications to assist with identifying compatible aftermarket speakers for the factory audio system.

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Speaker Details by Location
Location Size Type Notes
Front Door Panel 6.5 Midbass / Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Rear 6.5 Midbass / Full-Range
  • Secondary sound location
  • Medium replacement priority
  • Replacement difficulty: medium
Rear Deck Lid 6.5 Midbass / Full-Range
  • Access through trunk
  • Medium replacement priority
  • Replacement difficulty: low

2004 Pontiac GTO Speaker Replacement Summary

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

Replacement difficulty:

Low: 2 Medium: 1 High: 0

Replacement priority:

High: 1 Medium: 2 Low: 0

2004 Pontiac GTO 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 Pontiac GTO uses a uniform 6.5 inch speaker size across all factory locations, which simplifies the replacement process when upgrading multiple positions simultaneously.
  • Both midbass and full-range speaker types are compatible with each position, allowing for flexibility in choosing between dedicated frequency-specific drivers or broader-range alternatives depending on the audio system configuration.
  • The front door panels typically receive priority during speaker upgrades since they position closest to occupants and contribute most directly to soundstage imaging and vocal clarity in the listening environment.
  • Midbass speakers focus on reproducing lower midrange and upper bass frequencies, which may complement a system with separate tweeters and subwoofers, while full-range speakers attempt to cover a wider frequency spectrum in a single driver.
  • The rear deck lid location often provides acoustic benefits for bass response due to the solid mounting surface and the coupling effect with the trunk cavity, though this varies with installation technique.
  • Sound improvement potential depends partly on the power handling and sensitivity ratings of replacement speakers compared to factory units, as higher sensitivity models can produce greater output with the same amplifier power.
  • The 2004 Pontiac GTO radio opening accommodates both single DIN and double DIN head units, which affects the potential for integrating aftermarket processors or amplifiers with more sophisticated crossover controls for the speaker system.
  • Component speaker systems with separate woofers and tweeters might utilize the existing 6.5 inch locations for woofer installation while requiring additional mounting solutions for the tweeter elements in the front stage.