2018 Jeep Grand Cherokee Speaker Sizes and Audio System Guide
2018 Jeep Grand Cherokee Speaker Sizes and Audio System Guide
This page outlines the factory speaker layout for the 2018 Jeep Grand Cherokee and highlights the upgrade considerations that matter before you shop. Equipment can vary by trim, body style, or audio package, so the speaker count and audio hardware may differ from one vehicle to another. Use the fitment details here as a starting point, then verify your exact setup before ordering replacement speakers or planning an upgrade.
Data verified by Nick Marchenko, PhD
Speaker Size Chart – 2018 Jeep Grand Cherokee
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 | Mid-Range | 3.5 inch | |
| Front Door | Tweeter | 1 inch | if equipped |
| Front Door | Full-Range | 6 x 9 inch | |
| Dash Corner | Center Channel | 3.5 inch | if equipped |
| Rear Door | Full-Range | 6.75 inch | |
| Rear Door | Tweeter | 1 inch | if equipped |
| Far-Rear Side Panels | Subwoofer | 8 inch | if equipped |
| Rear Pillar | Tweeter | 2.5 inch | if equipped |
| Rear Pillar | Tweeter | 3.5 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.
Recommended Speakers for the 2018 Jeep Grand Cherokee
Selected aftermarket speakers that match the factory sizes for this vehicle. Always verify mounting depth, connector type, and audio package before ordering.
3.5" Speakers
6.75" Speakers
8" Speakers
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Speaker Count by Trim – 2018 Jeep Grand Cherokee
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 |
|---|---|---|---|---|
| Summit 4dr 4x2 | 19 | 825W premium | SiriusXM AM/FM/HD/Satellite, seek-scan | ✓ |
| Summit 4dr 4x4 | 19 | 825W premium | SiriusXM AM/FM/HD/Satellite, seek-scan | ✓ |
| Overland 4dr 4x2 | 10 | 506W | SiriusXM AM/FM/HD/Satellite, seek-scan | ✓ |
| Overland 4dr 4x4 | 10 | 506W | SiriusXM AM/FM/HD/Satellite, seek-scan | ✓ |
| SRT 4dr 4x4 | 10 | 506W | SiriusXM AM/FM/HD/Satellite, seek-scan | ✓ |
| Trailhawk 4dr 4x4 | 10 | 506W | SiriusXM AM/FM/HD/Satellite, seek-scan | ✓ |
| Laredo 4dr 4x2 | 6 | 506W premium | SiriusXM AM/FM/Satellite, seek-scan | ✓ |
| Laredo 4dr 4x4 | 6 | 506W premium | SiriusXM AM/FM/Satellite, seek-scan | ✓ |
| Limited 4dr 4x2 | 6 | 506W premium | SiriusXM AM/FM/Satellite, seek-scan | ✓ |
| Limited 4dr 4x4 | 6 | 506W premium | SiriusXM AM/FM/Satellite, seek-scan | ✓ |
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 2018 Jeep Grand Cherokee?
Aftermarket fitment should start with the factory speaker locations listed for this 2018 Jeep Grand Cherokee, but diameter alone is not enough. Check mounting depth, bracket fit, connector type, and whether the vehicle uses a premium or factory-amplified audio system. Based on generation data for the WK2 platform, speaker locations can vary by audio package, so verify the exact setup before ordering. Selected audio systems may also include an optional subwoofer, which should be confirmed by trim and equipment.
Usually Safe Upgrades
- If your vehicle uses the front door 3.5 inch mid-range location, that size is the first place to match when shopping for replacements.
- If your vehicle uses the front door 6 x 9 inch full-range location, look for speakers that match the factory opening and mounting depth.
- If your vehicle uses the rear door 6.75 inch full-range location, that is another common replacement point to verify first.
- If your vehicle uses the optional 1 inch front door tweeter or rear door tweeter locations, match the opening carefully because tweeter fit can vary by audio package.
- If your vehicle uses the optional 8 inch far-rear side panel subwoofer, confirm the enclosure and trim-specific audio setup before buying a replacement.
Check Before Buying
- Confirm the trim and audio package, since speaker count ranges from 6 to 19 and equipment can vary.
- Measure mounting depth and grille clearance before ordering, especially for the front door 6 x 9 inch and rear door 6.75 inch locations.
- Verify connector style and factory bracket shape so the new speaker matches the vehicle’s existing hardware.
- Check whether the vehicle has the optional center channel, tweeters, or subwoofer if you are replacing more than the main door speakers.
- Use the factory speaker location data as a guide, but verify the exact vehicle before purchase because the 2018 listing is based on generation data.
Installation Notes
The 2018 Jeep Grand Cherokee uses generation-based speaker data, so verify the exact audio package before ordering parts. Speaker layouts can vary from 6 to 19 speakers depending on trim, and factory amplifier details should be confirmed by trim and audio package. During installation, remove panels carefully to avoid breaking clips and watch for wiring behind the door and dash areas. Check speaker depth before buying replacements, especially for the front door and rear door locations, since clearance can affect fitment. Mounting adapters may be needed to secure aftermarket speakers in the factory openings, and harness adapters can help keep the wiring clean and reversible. If your vehicle has the factory subwoofer, confirm enclosure access and speaker size before starting work. Selected audio systems may also include tweeters, a center channel, or rear pillar speakers if equipped, so match the parts to the exact system. Test every speaker after installation to confirm polarity, balance, and full-range output before reinstalling all panels.
Moderate difficulty, because trim-dependent audio equipment and panel removal require careful verification before installation.
Common Mistakes When Replacing Speakers
The 2018 Jeep Grand Cherokee can range from a basic 6-speaker setup to a 19-speaker premium system, so the safest upgrades come from verifying the exact audio package before ordering parts.
- Buying based only on the body-style label instead of checking actual speaker locations on the vehicle.
- Skipping trim and audio package verification even though speaker count, amplifier output, and radio setup vary from 6 to 19 speakers across the lineup.
- Ordering speakers by size alone without confirming mounting depth, basket clearance, and connector style at each location.
- Assuming tweeters are present everywhere instead of checking whether the front door, rear door, rear pillar, or center channel speakers are equipped on the specific vehicle.
- Treating the factory amplifier as the same on every Grand Cherokee when amplifier details should be verified by trim and audio package.
- Reassembling the doors or panels before testing every speaker, including any if equipped tweeters or subwoofer, to confirm polarity, balance, and channel operation.
Generation & Model Family
The 2018 Jeep Grand Cherokee belongs to the Fourth generation (WK2) - Second Facelift (2017–2021) 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 2018 Jeep Grand Cherokee uses speaker equipment that can vary by trim and audio package, so the best upgrade path depends on what is already installed. Based on generation data, the front stage is the best place to start for most buyers, followed by bass support or amplifier integration if you want a bigger system change.
| Goal | Best Upgrade Path | Why |
|---|---|---|
| Better clarity | Upgrade the front door speakers first, then add or replace the front tweeters if equipped. A stronger front stage usually gives the biggest improvement in vocals, detail, and overall balance. | Clarity comes from cleaner mids and highs, and the front of the cabin does most of the work. Since tweeters are listed as optional, verify the exact audio package before ordering parts. |
| More bass | If a factory subwoofer is equipped, confirm its location and system type before planning changes. For a stronger low-end result, add an aftermarket subwoofer and match it to the rest of the system. | The vehicle data shows an optional factory subwoofer, so bass upgrades should be planned around the existing setup. A dedicated subwoofer is the most effective way to add low-frequency output without stressing the main speakers. |
| Louder sound | Properly matched speakers and amplifier integration can improve volume and reduce distortion. Verify factory amp and premium system details before adding aftermarket amplifiers, especially on trims with higher speaker counts. | Loudness depends on both speaker efficiency and system integration. The trim data shows different audio packages, so confirming the installed amplifier setup helps avoid mismatches and keeps the upgrade path controlled. |
| Budget improvement | Replace the most-used front door speakers first, then expand the upgrade later if needed. Use same-size replacement speakers with correct mounting brackets. | This gives the most noticeable improvement for the least money because the front speakers carry the main music content. It is a practical first step when you want better sound without rebuilding the whole system. |
| 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 cabin looking original while improving sound. It also makes the upgrade easier to reverse later and helps maintain a tidy installation. |
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 2018 Jeep Grand Cherokee?
Based on generation data, the front door setup includes a 3.5-inch mid-range and a 6 x 9-inch full-range speaker. A 1-inch tweeter may also be present if equipped. Verify the exact audio package before ordering parts.
What size are the rear speakers in a 2018 Jeep Grand Cherokee?
Based on generation data, the rear door speakers are 6.75-inch full-range units. A 1-inch tweeter may also be included if equipped. Speaker layout can vary by audio package, so it is best to verify before buying replacements.
Does the 2018 Jeep Grand Cherokee have a factory subwoofer?
A factory 8-inch subwoofer is listed for some audio systems if equipped. It appears to be trim-dependent, so the exact setup should be confirmed by trim and audio package before planning an upgrade.
Can I replace the speakers without replacing the radio?
Yes, speaker replacement can be done while keeping the factory radio in place. The best results depend on the trim and audio system, and some setups may also include a factory amplifier. Verify the system before choosing new speakers.
Do I need mounting adapters for speaker upgrades?
Mounting adapters may be needed depending on the speaker location and the replacement speaker size. The Grand Cherokee uses multiple sizes across the cabin, so it is smart to confirm the exact location and fitment before ordering.
How do I know if my Grand Cherokee has a factory amplifier?
Factory amplifier details should be verified by trim and audio package. The 2018 Grand Cherokee includes different audio systems, with speaker counts ranging from 6 to 19 and amplifier output varying by trim.