1999 Ford Expedition Speaker Sizes and Audio System Guide
1999 Ford Expedition Speaker Sizes and Audio System Guide
This page covers the factory speaker layout for the 1999 Ford Expedition and the key details you need before planning an audio upgrade. Equipment can vary by trim, body style, or audio package, so speaker count and optional components may differ from one vehicle to another. Factory amplifier details should be verified by trim and audio package, and selected audio systems may also include a rear subwoofer if equipped.
Data verified by Nick Marchenko, PhD
Speaker Size Chart – 1999 Ford Expedition
Use this table as the main reference. Fitment depends on trim, factory audio package, mounting depth, and adapter availability.
| Location | Type | Factory Size | Note |
|---|---|---|---|
| Front Door | Full-Range | 6 x 8 inch | |
| Rear Door | Full-Range | 6 x 8 inch | |
| Far-Rear Side Panels | Subwoofer | 8 inch | if equipped |
Generic speaker location diagram. The table above shows the specific factory sizes for this vehicle. Exact location details may vary by body style and trim.
Speaker Count by Trim – 1999 Ford Expedition
Speaker count and audio equipment vary by trim and factory audio package. This table lists known configurations from our database.
| Trim | Speakers | Amplifier | Radio | Navigation |
|---|---|---|---|---|
| Eddie Bauer 4dr 4x2 | 7 | – | – | – |
| Eddie Bauer 4dr 4x4 | 7 | – | – | – |
| XLT 4dr 4x2 | 4 | – | – | – |
| XLT 4dr 4x4 | 4 | – | – | – |
Data sourced from manufacturer specifications. Verify with the window sticker or dealer before ordering audio components.
Vehicle and Audio System Specifications
This block helps identify the vehicle and its audio system configuration for fitment decisions.
What Speakers Fit the 1999 Ford Expedition?
Aftermarket fitment should start with the factory speaker locations listed above, but diameter alone is not enough. Check mounting depth, bracket fit, connector type, and whether the vehicle has a premium or factory-amplified audio system. On this 1999 Ford Expedition, the listed front and rear door speakers are 6 x 8 inch full-range units, and the far-rear side panel 8 inch subwoofer may be present if equipped. Factory speaker size gives you a starting point, but the final match depends on the exact opening and audio package.
Usually Safe Upgrades
- If your vehicle uses the front door 6 x 8 inch location, look for replacement full-range speakers in that size and confirm the mounting depth before ordering.
- If your vehicle uses the rear door 6 x 8 inch location, choose speakers that match the factory opening and verify the connector style used in your trim.
- If your vehicle has the far-rear side panel 8 inch subwoofer location, only consider an 8 inch replacement if that speaker is equipped in your audio system.
- If your trim uses a 4-speaker setup, focus on the door locations first and confirm whether the rear side panel subwoofer is present before buying extra parts.
Check Before Buying
- Confirm the speaker location in your vehicle before ordering, since the factory setup can vary by audio package.
- Measure mounting depth and opening clearance so the replacement speaker will sit correctly behind the grille or panel.
- Check whether your system uses a factory amplifier, since amplifier details should be verified by trim and audio package.
- If you are replacing the optional subwoofer location, verify that the 8 inch opening is actually equipped in your vehicle.
Installation Notes
The 1999 Ford Expedition uses 6 x 8 inch full-range speakers in the front and rear doors, and some vehicles may also have an 8 inch rear side-panel subwoofer if equipped. Start by carefully removing the door panels and any rear trim panels, since clips and fasteners can be easy to damage if forced. Before ordering parts, verify speaker depth and mounting space, especially if you are upgrading to a larger magnet or aftermarket basket. Speaker mounting adapters may be needed to match the factory openings, and a harness adapter can help keep the factory wiring intact. If your vehicle has the factory subwoofer, confirm the enclosure and wiring before replacing it. Factory amplifier details should be verified by trim and audio package, since equipment can vary. After installation, test each speaker location for balance, polarity, and proper operation before reinstalling every panel.
Moderate difficulty, since panel removal, fitment checks, and wiring verification are important.
Common Mistakes When Replacing Speakers
The biggest audio upgrade mistakes on this 1999 Ford Expedition usually happen when buyers assume every trim uses the same speaker setup or skip basic fitment checks before ordering parts.
- Buying based only on the body-style label instead of checking actual speaker locations on the vehicle. This Expedition uses 6 x 8 inch full-range speakers in the front and rear doors, while the far-rear side panel 8 inch subwoofer is only listed if equipped, so the actual audio layout should be confirmed on the vehicle.
- Ignoring trim and audio package differences. The trim audio data shows speaker count can range from 4 to 7, so factory amplifier details should be verified by trim and audio package before choosing replacement parts.
- Ordering speakers without checking mounting depth and basket clearance. Even when the size matches, the door and rear-panel openings still need enough room behind the speaker for safe installation.
- Overlooking connector style and wiring condition. The factory plug shape, adapter needs, and any previous repairs should be checked before installation so the new speakers can be connected correctly.
- Assuming the rear subwoofer is always present or treating it like a standard part of every setup. The 8 inch far-rear side panel subwoofer is listed as if equipped, so it should only be planned for when the vehicle actually has that option.
- Reassembling the panels before testing the system. Each speaker should be checked for sound, balance, and polarity first so any wiring or fitment issue can be corrected before everything is put back together.
Generation & Model Family
The 1999 Ford Expedition belongs to the First generation (UN93) - Facelift (1999–2002) family. Nearby model years often share similar speaker locations and audio layouts, but exact fitment can vary by trim and audio package – verify before ordering.
Recommended Upgrade Path
This 1999 Ford Expedition uses a speaker layout that can vary by trim and audio package, so it helps to plan upgrades around the equipment in your specific vehicle. Front and rear full-range speakers are the main starting point, while some setups may also include a rear subwoofer. A smart upgrade path depends on whether you want cleaner sound, more bass, or a factory-style result.
| Goal | Best Upgrade Path | Why |
|---|---|---|
| Better clarity | Upgrade the front door speakers first, and add tweeters if your audio setup includes them or if you are building a front-stage-focused system. Prioritizing the front stage usually gives the biggest improvement in vocals, detail, and overall balance. | The front speakers do the most work for music clarity, so improving them first gives the cleanest mids and highs. If tweeters are part of your setup, they can further sharpen the front sound image. |
| More bass | If your Expedition is equipped with the factory rear subwoofer, treat it as a starting point and consider an aftermarket subwoofer upgrade for stronger low-end output. If it is not equipped, adding a subwoofer is the most effective way to add bass without overworking the door speakers. | A dedicated subwoofer handles low frequencies better than full-range speakers alone. Factory subwoofer details should be verified by trim and audio package before planning the upgrade. |
| Louder sound | Properly matched speakers and amplifier integration can improve volume and reduce distortion. Verify factory amp and premium-system integration before adding aftermarket amplifiers, then build around speakers that can handle the added power cleanly. | Higher output only helps when the speakers and signal path are matched correctly. Checking the existing audio setup first helps avoid noise, clipping, or compatibility issues. |
| Budget improvement | Replace the front door speakers first with same-size replacement speakers and the correct mounting brackets. This gives the best value because the front speakers usually have the biggest impact on everyday listening. | A front-speaker-first approach improves the sound you hear most often without requiring a full system overhaul. It is the most cost-effective way to make the cabin sound better quickly. |
| Factory look | Use same-size replacement speakers with the correct mounting brackets and harness adapters for a clean install that preserves the factory wiring and appearance. | This approach keeps the interior looking original while still improving sound quality. It also helps maintain a neat installation with less modification to the vehicle. |
Mounting Adapters and Wiring
The same nominal diameter does not guarantee a direct mount. Before ordering, confirm:
- Speaker depth: Aftermarket speakers often have larger magnets – measure available depth at each location.
- Mounting brackets: Door locations typically need a bracket or spacer to clear the window regulator and achieve correct mounting depth.
- Wiring harness adapters: Use a plug-and-play harness adapter to preserve factory wiring.
- Tweeter mounting cups: Replacing OEM tweeters may require surface-mount cups or brackets depending on the location.
- Factory or premium amplified systems: If the vehicle has a premium or factory-amplified audio system, confirm how the factory radio, amplifier, and speakers are connected before adding aftermarket amplifiers. Depending on the setup, a line output converter, DSP, integration harness, or professional installation may be needed.
- Connector type: Factory connectors vary by trim and model year – confirm compatibility before splicing or using an adapter.
Frequently Asked Questions
What size are the front door speakers in a 1999 Ford Expedition?
The front door speakers are 6 x 8 inch full-range units. This size is listed directly for the 1999 Expedition and applies to the front door locations.
What size are the rear door speakers?
The rear door speakers are also 6 x 8 inch full-range units. That matches the direct speaker data for this model year.
Does the 1999 Ford Expedition have a factory subwoofer?
A factory subwoofer is listed and may be trim-dependent, so it should be checked by audio package. If equipped, it is shown in the far-rear side panels as an 8 inch subwoofer.
Can I replace the speakers without replacing the radio?
Yes, speaker replacement can be done without replacing the radio. The factory radio may vary by trim, but the speaker locations and sizes are listed separately for this model year.
Do I need mounting adapters for speaker replacement?
Mounting adapters may be needed depending on the replacement speaker design. The factory speaker sizes are 6 x 8 inch in the front and rear doors, so matching the opening is important.
Does the 1999 Ford Expedition have a factory amplifier?
Factory amplifier details should be verified by trim and audio package. The trim data lists amplifier information as N/A, so it is best to confirm the exact setup before ordering parts.