Can Speakers Along Improve Sound of Stock Outback Radio?

Why Replacing Speakers is the First Step for Better Subaru Audio

Yes, you can speakers along improve sound of stock outback radio significantly, provided you select the right components. Replacing the thin, factory paper-cone speakers with high-quality aftermarket units immediately enhances clarity, frequency response, and mid-bass punch.

However, the “stock” head unit in most Subaru Outbacks (especially the Starlink system) has limited power output. To truly see an improvement without adding an external amplifier, you must choose high-sensitivity speakers (rated 90dB or higher) that can operate efficiently on low wattage.

TL;DR: Key Takeaways for Outback Owners

• Immediate Impact: Better speakers fix the “muddy” mids and “shrill” highs common in stock systems.
• Sensitivity Matters: Look for speakers with a sensitivity rating of 92dB+ to work with the low-power factory radio.
• Plug-and-Play: Using Metra wiring harnesses and bracket adapters makes this a DIY-friendly project.
• Component vs. Coaxial: Use component speakers (separate tweeter) for the front dash and doors to elevate the soundstage.
• The “Bass” Reality: New speakers improve punch, but for “rumble,” you will eventually need a compact powered subwoofer.

How Can Speakers Along Improve Sound of Stock Outback Radio Performance?

The factory speakers in a standard Subaru Outback are built for cost and weight, not acoustic fidelity. When we pull these out in our shop, the first thing customers notice is that the magnets are roughly the size of a quarter. These tiny magnets cannot move the speaker cone with enough precision to create high-fidelity sound.

When you ask if can speakers along improve sound of stock outback radio setups, you are really asking about efficiency. Most aftermarket speakers from brands like Focal, Morel, or Hertz use high-grade materials like polypropylene cones and silk dome tweeters. These materials respond faster to the electrical signals from your radio, resulting in much crisper audio.

The Role of the Factory EQ Curve

It is important to understand that Subaru programs a specific Equalization (EQ) curve into the head unit. This curve often boosts the bass at low volumes and cuts it at high volumes to prevent the cheap factory speakers from blowing.

By installing better speakers, you allow the system to handle that “boosted” signal without the distortion and clipping that plagues the stock units. While the “curve” remains the same, the output is significantly cleaner.

Why Your Factory Subaru Speakers Sound Muffled

We have tested the frequency response of the stock Outback drivers, and the results are often disappointing. The factory speakers lack a dedicated crossover network. This means the door speakers are trying to play high notes they weren’t designed for, and the dash speakers are struggling with mid-range frequencies.

Common Issues with Stock Outback Audio:

1. Paper Cone Degradation: Moisture in the door panels causes the paper cones to soften over time, leading to “floppy” bass.
2. Whizzler Cones: Instead of real tweeters, many base-model Outbacks use a small “whizzler” cone attached to the main woofer, which produces “tinny” high frequencies.
3. Lack of Power Handling: The stock speakers are often rated for only 15-20 Watts RMS. If you turn the volume up past 30, they begin to distort mechanically.

By upgrading, you move to butyl rubber surrounds and voice coils that can handle heat and vibration much better. This durability is why we always recommend speakers as the first “mod” for any new Subaru owner.

The Critical Factor: Speaker Sensitivity and Impedance

The biggest mistake Outback owners make is buying the most expensive, power-hungry speakers they can find. If you buy a speaker that requires 100 Watts RMS to “wake up,” and you hook it to a 15-Watt Starlink radio, it will actually sound worse than the stock speakers.

To ensure that can speakers along improve sound of stock outback radio units effectively, you must focus on two technical specs:

Sensitivity (Efficiency)

Sensitivity measures how loud a speaker plays with 1 watt of power.

• Bad Choice: 85dB – 88dB (Requires an external amp).


• Good Choice: 90dB – 92dB (Works okay with stock radio).


• Best Choice: 93dB+ (Will sound significantly louder and clearer on stock power).

Impedance (Ohms)

Most car audio speakers are 4-Ohm. However, some brands like JBL and Infinity offer 3-Ohm or 2.5-Ohm speakers (often marketed as True 4-Ohm Technology). These allow the head unit to “see” less resistance, effectively pulling a bit more power from the built-in chip.

Step-by-Step: Installing New Speakers in Your Outback

If you’ve decided that can speakers along improve sound of stock outback radio quality for your needs, here is how you perform the swap. Most Subaru Outbacks (2015-2024) use a 6×9-inch speaker in the front doors and a 6.5-inch speaker in the rear doors.

Tools Needed:

• Plastic Trim Removal Tools (To avoid scratching the door panels).
• Phillips Head Screwdriver.
• 10mm Socket/Wrench.
• Metra 72-8104 Wiring Adapters (No cutting required!).

The Installation Process:

1. Remove the Door Panel: Pop the small plastic cover behind the door handle and the one in the armrest pull-cup. Remove the screws hidden behind them.
2. Pop the Clips: Use your trim tool to start at the bottom of the door and pull outward to release the plastic clips.
3. Disconnect Cables: Carefully unhook the door latch cables and the power window harness.
4. Unbolt the Factory Speaker: Remove the four screws holding the speaker in place.
5. Install the Adapter Bracket: Stock Subaru speakers have a unique “integrated” bracket. You will need a Metra or Scosche 6×9 bracket to mount your new aftermarket speaker.
6. Connect and Test: Use the wiring harness to plug into the factory clip. Always test the sound before putting the door panel back on.
7. Reassemble: Snap the panel back into place and replace the screws.

Maximizing Your Investment: Sound Deadening and Fast Rings

If you want to prove that can speakers along improve sound of stock outback radio systems to a high degree, you cannot skip acoustic treatment. A car door is essentially a thin metal box; it vibrates and leaks sound energy.

The “Big Three” Improvements:

• Butyl Rubber Mats (Sound Deadening): Apply sheets of Dynamat or Noico to the inner metal skin of the door. This stops the “tinny” vibration and makes your mid-bass feel much “tighter.”
• Fast Rings (Foam Gaskets): These are foam circles that go around the speaker. They seal the speaker against the door panel, forcing all the sound through the grille and into your ears, rather than letting it “leak” inside the door cavity.
• Closed Cell Foam: Placing a small square of foam directly behind the speaker on the outer door skin helps absorb “back waves” that cause cancellation.

In our experience, a $100 set of speakers with $50 worth of sound deadening will almost always outperform a $300 set of speakers installed into a bare, vibrating door.

Choosing Between Coaxial and Component Speakers

When upgrading your Outback, you will encounter two types of speaker designs. Choosing the right one is vital for your “front stage” (the sound in the driver’s seat).

Component Speakers (The Professional Choice)

These consist of a separate woofer for the door and a tweeter for the dash.

• Pros: Elevates the sound so it feels like the singer is on your dashboard. Better clarity.


• Cons: Harder to install because you have to mount the tweeter in the dash and the woofer in the door.

Coaxial Speakers (The Easy Choice)

These have the tweeter built into the center of the woofer.

• Pros: Very easy to install; just “drop in.”


• Cons: Since they sit at the bottom of the door, the high-frequency sounds get absorbed by your legs and the carpet.

Expert Recommendation: Always go with a Component Set for the front of your Subaru. The Outback already has factory tweeter locations in the dash, making it easy to wire a component system.

Will Speakers Along Improve Sound of Stock Outback Radio Systems Enough for Audiophiles?

We must be realistic. While can speakers along improve sound of stock outback radio setups dramatically, there are two “ceiling” factors:

1. The Sub-Bass Gap: Even the best 6×9 speakers cannot produce the “thump” of a dedicated subwoofer. If you listen to Hip-Hop or EDM, you will likely still find the system lacking in the very low frequencies.
2. DSP Processing: The Subaru Starlink radio has a heavy built-in “Loudness” curve. At high volumes, the radio automatically turns down the bass to protect the system. The only way to fix this is with a Digital Signal Processor (DSP) or an Active Line Output Converter (LOC) like the AudioControl LC2i.

However, for 80% of listeners, simply swapping the four door speakers and the two dash tweeters provides a “night and day” difference that makes the daily commute much more enjoyable.

FAQ: Improving Your Subaru Outback Audio

Do I need to cut any wires to install new speakers?

No. If you purchase Metra 72-8104 (for doors) and Metra 72-8110 (for dash) wiring harnesses, the new speakers will plug directly into the factory Subaru clips. This is highly recommended for leased vehicles or to maintain resale value.

Will upgrading speakers void my Subaru warranty?

Generally, no. Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your entire vehicle warranty because you installed aftermarket speakers. However, if you cause a short circuit by improper wiring, that specific repair won’t be covered.

Can I keep my factory dash tweeters with new door speakers?

You can, but we don’t recommend it. Factory tweeters are often the weakest link. Most “component sets” come with a matching tweeter and woofer. Installing the matching tweeter will ensure the “tonal balance” is correct across the entire frequency range.

Why does the bass seem lower after I installed new speakers?

This is a common “break-in” issue. New speakers have stiff butyl rubber surrounds that need about 20-40 hours of play time to loosen up. Additionally, ensure your speakers are in-phase (positive to positive). If one speaker is wired backward, the bass waves will cancel each other out.

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