2004 Subaru Impreza Speaker Sizes and Audio System Guide
2004 Subaru Impreza Speaker Sizes and Audio System Guide
This page covers the factory speaker layout for the 2004 Subaru Impreza, including speaker locations and upgrade notes for the second-generation facelift models. Equipment can vary by trim, body style, or audio package, so speaker count and audio hardware are 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 equipment if equipped.
Data verified by Nick Marchenko, PhD
Speaker Size Chart – 2004 Subaru Impreza
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 2004 Subaru Impreza
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
Disclosure: Product links are affiliate links. We may earn a commission at no extra cost to you.
Speaker Count by Trim – 2004 Subaru Impreza
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 |
|---|---|---|---|---|
| WRX 4dr All-wheel Drive Sedan | 6 | opt | – | – |
| WRX 4dr All-wheel Drive Wagon | 6 | opt | – | – |
| 2.5RS 4dr All-wheel Drive Sedan | 4 | opt | – | – |
| 2.5TS 4dr All-wheel Drive Wagon | 4 | opt | – | – |
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
This 2004 Subaru Impreza uses the same core speaker layout across the model, with 6.5-inch full-range speakers in the front and rear doors. Body style can still affect factory audio packages and speaker count, so equipment should be checked by trim. Factory amplifier details should be verified by trim and audio package.
What Speakers Fit the 2004 Subaru Impreza?
Aftermarket fitment should start with the factory speaker locations listed for this 2004 Subaru Impreza, but diameter alone is not enough. The front and rear door openings are listed as 6.5 inch full-range speakers, while speaker count can vary by trim. Factory amplifier details should be verified by trim and audio package, and selected audio systems may also include additional equipment if equipped. Always confirm mounting depth, bracket style, and connector type before buying.
Usually Safe Upgrades
- If your vehicle uses the front door location, a 6.5 inch full-range speaker is the starting point for fitment.
- If your vehicle uses the rear door location, a 6.5 inch full-range speaker is the starting point for fitment.
- If your trim is one of the higher-output audio packages, speaker count and wiring may differ from the base setup.
- If equipped with additional factory audio equipment, match the replacement to the existing system layout before ordering.
Check Before Buying
- Measure the mounting depth at each door location, not just the speaker diameter.
- Confirm whether your trim uses a 4-speaker or 6-speaker setup before selecting replacements.
- Check the factory connector style so you know whether any adapter is needed.
- Verify whether your vehicle has factory audio equipment that changes wiring or speaker placement.
- Compare the replacement speaker’s frame size and mounting pattern against the original opening.
Installation Notes
The 2004 Subaru Impreza uses 6.5-inch full-range speakers in the front and rear doors, and trim equipment can vary from 4 to 6 speakers. Before starting, remove the door panels carefully and keep track of clips and fasteners so the trim goes back together cleanly. Check speaker depth and mounting depth before ordering parts, since clearance can vary by trim and audio package. Speaker mounting adapters may be needed to match the factory openings, and harness adapters can help avoid cutting the original wiring. If your vehicle has the factory amplifier, verify the audio package before choosing replacement speakers or an interface. There are no factory tweeters listed, and a factory subwoofer is not listed for this model. After installation, test each speaker for balance, polarity, and proper operation before reinstalling all panels. If you are upgrading the system, confirm radio and navigation compatibility by trim because equipment can vary.
Moderate difficulty, since door panel removal, wiring checks, and fitment verification are important for a clean installation.
Common Mistakes When Replacing Speakers
When shopping for audio upgrades on the 2004 Subaru Impreza, the biggest problems usually come from assuming every trim is wired the same and skipping a few basic fitment checks.
- Buying based only on the body-style label instead of checking actual speaker locations on the vehicle.
- Assuming every trim has the same speaker count; this Impreza can be 4 or 6 speakers depending on trim and audio package.
- Ignoring factory amplifier differences; amplifier details should be verified by trim and audio package because it is listed as optional on some trims.
- Skipping connector and wiring checks before ordering parts, since radio and navigation equipment can vary by trim.
- Not confirming mounting depth and speaker size at the vehicle before installation, even though the listed front and rear door speakers are 6.5 inch full-range units.
- If equipped, overlooking tweeter or subwoofer-related wiring and locations during planning, which can lead to incomplete upgrades or missing channels.
Generation & Model Family
The 2004 Subaru Impreza belongs to the Second generation (GD) - Facelift (2004–2005) 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 2004 Subaru Impreza uses a simple speaker layout, but equipment can vary by trim and audio package. Some versions also include an optional factory amplifier, so it is worth confirming the system before choosing upgrades. The best path depends on whether you want cleaner sound, more output, stronger bass, or a low-cost refresh that keeps the cabin looking original.
| Goal | Best Upgrade Path | Why |
|---|---|---|
| Better clarity | Start with the front door speakers and add front-stage tweeter upgrades if equipped or supported by the chosen system. Focus on higher-quality speakers that improve midrange detail and high-frequency clarity. | The front stage has the biggest impact on vocals, instruments, and overall sound separation, so improving it first gives the clearest audible change. |
| More bass | Add an aftermarket subwoofer to complement the factory speakers and relieve the door speakers from trying to handle deep bass. If the vehicle has a factory bass-heavy setup or optional audio package, verify how it is integrated before adding new low-frequency gear. | A dedicated subwoofer is the most effective way to add low-end impact without pushing the door speakers beyond their comfort range. |
| Louder sound | Use properly matched speakers and amplifier integration to improve volume and reduce distortion. Verify factory amp or premium system integration before adding aftermarket amplifiers so the upgrade works cleanly with the existing audio setup. | Higher output needs the right speaker and amplifier pairing, and checking the existing system first helps avoid integration problems and uneven sound. |
| 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 handle the most important listening position. | A front-speaker-first approach delivers the biggest improvement per dollar and keeps the upgrade 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 quality and making future service easier. |
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 2004 Subaru Impreza?
The front door speakers are 6.5-inch full-range units. This applies to the model data provided for the 2004 Impreza.
What size are the rear door speakers?
The rear door speakers are also 6.5-inch full-range speakers. Speaker layouts can vary by trim, so it is still worth confirming the exact setup before ordering parts.
Does the 2004 Subaru Impreza have a factory subwoofer?
A factory subwoofer is not listed in the provided data. If equipped on a specific audio package, it should be verified by trim and radio setup before choosing upgrade parts.
Do I need mounting adapters for speaker replacement?
Mounting adapters may be needed depending on the speaker brand and installation depth. The factory speaker sizes are known, but fitment details can still vary with the replacement hardware.
Can I replace the speakers without replacing the radio?
Yes, speaker replacement can be done while keeping the factory radio. The best results depend on speaker choice, vehicle wiring, and whether the system has any trim-specific audio equipment.
Does the 2004 Subaru Impreza have a factory amplifier?
Factory amplifier details should be verified by trim and audio package. The provided data shows an amplifier on some trims, but it is not universal across the model.