1999 Lincoln Navigator Speaker Sizes and Audio System Guide
1999 Lincoln Navigator Speaker Sizes and Audio System Guide
This page covers the factory speaker locations, original speaker sizes, and key upgrade notes for the 1999 Lincoln Navigator. Equipment can vary by trim, body style, or audio package, so factory amplifier details should be verified by trim and audio package. The information here is based on direct model-year data and is meant to help you identify what your vehicle may have before choosing replacement speakers or planning an audio upgrade.
Data verified by Nick Marchenko, PhD
Speaker Size Chart – 1999 Lincoln Navigator
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 |
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 Lincoln Navigator
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 |
|---|---|---|---|---|
| Base 4dr 4x2 | 4 | premium | – | – |
| Base 4dr 4x4 | 4 | premium | – | – |
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 Lincoln Navigator?
Aftermarket fitment should start with the factory speaker locations listed above, but diameter alone is not enough. For this 1999 Lincoln Navigator, the listed front and rear door speakers are 6 x 8 inch full-range units, and matching the size is only part of the job. Check mounting depth, bracket shape, and connector type before buying. Factory amplifier details should be verified by trim and audio package, since premium audio is listed on some trims. A factory subwoofer is not listed for this model year.
Usually Safe Upgrades
- If your vehicle uses the front door location, a 6 x 8 inch full-range speaker is the factory size to match.
- If your vehicle uses the rear door location, a 6 x 8 inch full-range speaker is the factory size to match.
- If your vehicle has a premium or factory-amplified audio system, choose speakers that are compatible with that setup.
- If your vehicle uses the factory locations above, aftermarket speakers with the same size can be a practical starting point.
Check Before Buying
- Confirm the front and rear door speaker size before ordering, since the listed fitment is 6 x 8 inch for both locations.
- Check mounting depth and speaker frame clearance so the new speaker will sit correctly in the door.
- Verify the connector type and whether any adapter is needed for your vehicle.
- Review trim and audio package details if your Navigator has premium audio, since amplifier presence is not universal.
Installation Notes
The 1999 Lincoln Navigator uses 6 x 8 inch full-range speakers in the front and rear doors, with a 4-speaker layout on the listed trims. Panel removal is the first step, and trim pieces should be handled carefully to avoid breaking clips or marring the door panels. Before disconnecting anything, verify the speaker wiring and confirm whether your vehicle has the factory amplifier, since amplifier details vary by trim and audio package. A speaker harness adapter is recommended to help keep the factory wiring intact, and a mounting adapter may be needed depending on the replacement speaker design. Check speaker depth before installation so the new speakers clear the window glass and door structure. If you are adding aftermarket speakers, test polarity and audio output before reinstalling the door panels. If your vehicle has the factory subwoofer, match the replacement plan to the existing system so the bass output stays balanced with the rest of the audio setup.
Moderate difficulty, since door panel removal, wiring verification, and speaker fitment checks all matter before reassembly.
Common Mistakes When Replacing Speakers
When shopping for speakers or audio upgrades for the 1999 Lincoln Navigator, the biggest problems usually come from assuming the factory setup instead of verifying the actual equipment on the vehicle.
- Buying based only on the body-style label instead of checking actual speaker locations on the vehicle.
- Skipping trim and audio package checks even though factory amplifier details should be verified by trim and audio package.
- Choosing speakers without confirming mounting depth and connector style, which can cause fitment and wiring problems.
- Assuming tweeters are part of the factory setup when they are not listed for this model year; if equipped, they should be verified before ordering.
- Overlooking the 4-speaker trim audio layout and assuming every Navigator uses the same radio or amplifier setup.
- Reassembling the door panels before testing each speaker and channel, which can hide wiring or polarity issues until later.
Generation & Model Family
The 1999 Lincoln Navigator belongs to the First generation (UN173) (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
The 1999 Lincoln Navigator uses a simple factory speaker layout, so upgrade planning is straightforward. Equipment can vary by trim, and factory amplifier details should be verified by trim and audio package before buying parts. Most buyers will get the best results by starting with the front stage, then adding bass or power if the system needs more output.
| Goal | Best Upgrade Path | Why |
|---|---|---|
| Better clarity | Upgrade the front door speakers first, then add front tweeters if your audio setup includes them or if you are building a stronger front stage. | Cleaner front-stage speakers do the most work for vocals and detail, so this is the best place to improve mids and highs without changing the whole system at once. |
| More bass | Add an aftermarket subwoofer and match it with the rest of the system so the factory speakers can handle mids and highs while the sub handles low-end output. | A dedicated subwoofer is the most effective way to add low-frequency impact and keep the main speakers from working too hard on bass-heavy music. |
| Louder sound | Properly matched speakers and amplifier integration can improve volume and reduce distortion. Verify factory amp or premium system integration before adding aftermarket amplifiers. | More output usually comes from better power matching, and checking the existing audio package first helps avoid integration problems and uneven sound. |
| Budget improvement | Replace the front door speakers first with same-size replacement speakers with correct mounting brackets. | The front doors carry the most important listening duties, so this gives the most noticeable improvement for the money while keeping the install simple. |
| 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, and it avoids unnecessary changes to the vehicle’s wiring and trim. |
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 Lincoln Navigator?
The front door speakers are 6 x 8 inch full-range units. This model year data lists them as standard front door locations for the Navigator.
What size are the rear door speakers in a 1999 Lincoln Navigator?
The rear door speakers are also 6 x 8 inch full-range units. The speaker layout for this model year shows matching front and rear door sizes.
Does the 1999 Lincoln Navigator have a factory subwoofer?
A factory subwoofer is not listed for this model year. If your vehicle has one, it should be verified by trim and audio package.
Do I need mounting adapters for speaker replacement?
Mounting adapters may be needed depending on the speaker design and the vehicle’s existing openings. The factory speaker size is 6 x 8 inch in both front and rear doors.
Can I replace the speakers without replacing the radio?
Yes, speaker replacement can be done without replacing the radio. The factory radio setup varies by trim, so matching the new speakers to the existing system is important.
Should I verify the factory amplifier before upgrading?
Yes, factory amplifier details should be verified by trim and audio package. Some trims list a premium amplifier, while others may differ.