2018 Ford Flex Speaker Sizes

The 2018 Ford Flex factory audio system features specific mounting locations that accommodate designated drivers, where the a-pillar accepts a 1 inch speaker size, while the center dash and d-pillar accommodate 3.5 inch speakers, and the front door panel and rear door panel support 6x8 inch units, and the rear side panel accommodates an 8 inch unit. These positions permit a functional replacement and upgrade using compatible speaker types such as tweeters, full-range drivers, midrange units, and woofers.

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
Center Dash 3.5 Full-Range
  • Requires dashboard disassembly
  • Medium replacement priority
  • Replacement difficulty: medium
D-Pillar 3.5 Midrange
  • Extremely difficult access
  • Professional service only
  • Low replacement priority
  • Replacement difficulty: high
Front Door Panel 6x8 Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Rear Door Panel 6x8 Full-Range
  • Standard installation
  • Medium replacement priority
  • Replacement difficulty: low
Rear Side Panel 8 Woofer
  • Requires trim removal
  • Medium replacement priority
  • Replacement difficulty: medium

2018 Ford Flex Speaker Replacement Summary

6 total positions
2 easy to replace
1 high priority
2 professional only

Replacement difficulty:

Low: 2 Medium: 2 High: 2

Replacement priority:

High: 1 Medium: 2 Low: 3

Additional Notes

  • The 2018 Ford Flex factory audio system separates frequencies across multiple locations, with 1-inch tweeters in the A-pillars handling high frequencies, while larger drivers manage mid and low ranges throughout the cabin.
  • Front and rear door panels both utilize 6x8-inch full-range speakers, suggesting a parallel approach to sound staging between front and rear seating areas rather than a front-biased configuration.
  • The D-pillar location houses 3.5-inch midrange drivers rather than full-range units, indicating these may be dedicated to specific frequency bands in a more complex factory sound system design.
  • An 8-inch woofer in the rear side panel position likely provides bass reinforcement, though its single-location specification suggests mono bass reproduction rather than stereo subwoofer implementation.
  • The center dash 3.5-inch full-range speaker may serve as a center channel in certain audio configurations or provide supplemental fill for the soundstage across the width of the dashboard.
  • Aftermarket upgrades to the front door 6x8-inch positions would potentially yield the most noticeable improvement in overall sound quality, given their role as primary full-range drivers and typical proximity to front seat occupants.
  • The specialized tweeter and midrange placements in the pillars suggest that replacing these components might require attention to crossover frequencies and power handling to maintain proper integration with remaining factory speakers.