2011 Subaru Legacy Speaker Sizes and Audio System Guide
2011 Subaru Legacy Speaker Sizes and Audio System Guide
This page covers the factory speaker locations, original speaker layout, and upgrade considerations for the 2011 Subaru Legacy. Equipment can vary by trim, body style, and audio package, so the audio setup is not the same across every version. Factory amplifier details should be verified by trim and audio package, and selected audio systems may also include additional components. Use the trim table below to match your vehicle before choosing upgrades.
Data verified by Nick Marchenko, PhD
Speaker Size Chart – 2011 Subaru Legacy
Use this table as the main reference. Fitment depends on trim, factory audio package, mounting depth, and adapter availability.
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 2011 Subaru Legacy
Selected aftermarket speakers that match the factory sizes for this vehicle. Always verify mounting depth, connector type, and audio package before ordering.
6.5" Speakers
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Speaker Count by Trim – 2011 Subaru Legacy
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 |
|---|---|---|---|---|
| 2.5GT Limited 4dr Sedan | 9 | 440W | – | – |
| 2.5i Limited 4dr Sedan | 9 | 440W | – | – |
| 3.6R Limited 4dr Sedan | 9 | 440W | – | – |
| 2.5i 4dr Sedan | 4 | opt | – | – |
| 2.5i Premium 4dr Sedan | 4 | 440W | – | – |
| 3.6R 4dr Sedan | 4 | opt | – | – |
| 3.6R Premium 4dr Sedan | 4 | 440W | – | – |
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.
Body Style Audio Differences
Different body styles of the 2011 Subaru Legacy may vary in rear speaker placement and factory audio packages, so audio equipment should be verified by the exact vehicle configuration. The listed speaker data shows 6.5-inch full-range front and rear door speakers, while trim-level systems can range from 4 to 9 speakers.
What Speakers Fit the 2011 Subaru Legacy?
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 2011 Subaru Legacy, the listed factory locations are 6.5 inch full-range speakers in the front and rear doors, while trim and audio package details can change the speaker count and amplification setup. Selected audio systems may also include a factory subwoofer if equipped.
Usually Safe Upgrades
- If your vehicle uses the front door location, a 6.5 inch full-range speaker is the factory size to compare against when shopping for replacements.
- If your vehicle uses the rear door location, a 6.5 inch full-range speaker is the factory size to compare against when shopping for replacements.
- If your vehicle has a premium or factory-amplified audio system, verify compatibility before buying because speaker count and amplifier setup can vary by trim.
- If equipped, a factory subwoofer should be checked separately from the door speaker locations listed here.
Check Before Buying
- Confirm the exact trim and audio package, since speaker count ranges from 4 to 9 and amplifier details vary by trim.
- Measure mounting depth and compare the speaker frame shape before ordering, not just the diameter.
- Check the factory connector style and whether any adapter or harness is needed for your chosen speaker.
- Verify whether your vehicle has the premium audio setup, because factory amplifier details should be verified by trim and audio package.
Installation Notes
On the 2011 Subaru Legacy, front and rear door speakers are listed as 6.5-inch full-range units, so installation usually starts with careful panel removal and a close check of speaker depth before ordering parts. Because trim and audio equipment can vary, verify your exact setup before you begin, especially if your car has the factory amplifier or a higher audio package. Use the correct wiring harness adapters to avoid cutting factory wiring, and confirm polarity at each speaker location during reassembly. Mounting adapters may be needed to secure aftermarket speakers properly in the door openings, and shallow-depth models can help avoid interference with the window mechanism or inner door structure. If your vehicle has the factory subwoofer, plan the system around that component as well. After everything is installed, test balance, fade, and all speaker locations before fully tightening the door panels.
Moderate difficulty, since door-panel removal, wiring verification, and speaker depth checks require care.
Common Mistakes When Replacing Speakers
The 2011 Subaru Legacy can vary a lot by trim and audio package, so the safest upgrade plan starts with verifying the exact system in 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 speaker count and amplifier setup can change from 4 to 9 speakers and factory amplifier details should be verified by trim.
- Choosing replacement speakers without confirming mounting depth and connector style, which can cause fitment problems even when the size matches.
- Assuming tweeters or a factory subwoofer are present on every model; if equipped, those parts should be identified before ordering parts or adapters.
- Ignoring the factory amplifier on trims that use one, since amplified systems may need different speaker choices and wiring considerations.
- Reassembling the door panels before testing the new speakers, which can turn a simple install into extra labor if a connection or polarity issue shows up.
Generation & Model Family
The 2011 Subaru Legacy belongs to the Fifth generation (BM) (2010–2012) 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 2011 Subaru Legacy uses a simple factory speaker layout, but equipment can vary by trim and audio package. Some versions also include a factory amplifier, so it is worth verifying the system before planning upgrades. The best path depends on whether you want cleaner detail, more output, stronger bass, or a subtle factory-style refresh.
| Goal | Best Upgrade Path | Why |
|---|---|---|
| Better clarity | Start with the front door speakers and, if equipped, upgrade the front stage with better tweeters or a component-style setup for cleaner mids and highs. | Front-stage upgrades usually make the biggest difference in detail and vocal clarity, especially when the goal is cleaner sound without changing the whole system. |
| More bass | Add an aftermarket subwoofer to complement the factory speakers and give the system more low-end impact. | The factory speaker layout is not designed for strong bass output, so adding a subwoofer is the most effective way to fill out the low end. |
| 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. | Higher output depends on both speaker choice and system matching, and factory audio package details should be checked first so the upgrade works correctly with the existing setup. |
| Budget improvement | Replace the front door speakers first with same-size replacement speakers and correct mounting brackets. | The front doors handle the most important everyday sound, so upgrading them first gives the best improvement for the money. |
| 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 and making the installation easier to manage. |
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 2011 Subaru Legacy?
The front door speakers are 6.5-inch full-range units. This applies to the model data provided for the 2011 Legacy.
What size are the rear door speakers in a 2011 Subaru Legacy?
The rear door speakers are 6.5-inch full-range units. This matches the direct speaker data for this model year.
Does the 2011 Subaru Legacy have a factory subwoofer if equipped?
A factory subwoofer is not listed in the provided data. If your vehicle has one, it would depend on the audio package or trim.
Do I need mounting adapters for speaker replacement?
Mounting adapters may be needed depending on the speaker brand and installation depth. The factory locations are 6.5-inch front and rear door positions.
Can I replace the speakers without replacing the radio?
Yes, speaker replacement can be done without changing the radio. Factory radio and navigation details vary by trim, so compatibility should be checked before choosing upgrades.
Does the 2011 Subaru Legacy have a factory amplifier?
Factory amplifier details should be verified by trim and audio package. Some trims list a 440W amplifier, while others show optional amplifier equipment.