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Alpine Digital Precision Series
The Alpine DP2-45C-B is a vehicle-specific 12cm component speaker upgrade for selected BMW 3 Series, 4 Series, M3 and M4 models. Advanced cone materials, separate soft-dome tweeters and BMW-specific integration deliver clearer vocals, improved detail and more controlled mid-bass.
Product Overview
The Alpine DP2-45C-B is a premium 2-way component speaker system developed specifically for selected BMW vehicles. The speakers fit into compatible original door locations while retaining the vehicle’s factory interior appearance.
Separate 12cm midrange drivers and 2.5cm tweeters improve clarity across the front soundstage. Vocals sound more natural, instruments are easier to distinguish and high-frequency detail is reproduced with greater precision than conventional factory speakers.
As part of Alpine’s Digital Precision Series, the DP2-45C-B combines lightweight materials, powerful neodymium magnets and carefully controlled cone movement to deliver accurate, dynamic sound from a discreet vehicle-specific installation.
Key Benefits
Dedicated mounting and connections allow the speakers to integrate neatly into compatible BMW factory door locations.
Lightweight, rigid hybrid diaphragms support accurate cone movement, natural vocals and reduced unwanted distortion.
Separate 2.5cm tweeters reproduce high-frequency detail with a smooth, clear and dynamic sound.
High Amplitude Multi-Roll technology supports greater linear cone movement for controlled output and stronger mid-bass.
Factory-Style Installation
The DP2-45C-B fits behind compatible original BMW door grilles, maintaining the vehicle’s standard interior appearance. Its compact neodymium motor structure and vehicle-specific design make it ideal for owners who want improved sound without visible aftermarket speaker pods, drilling or extensive permanent modifications.
Digital Precision Technology
Every part of the DP2-45C-B has been selected to improve control, clarity and durability while working within the limited space available behind BMW door trim.
High rigidity and low moving mass help the speaker respond quickly and reproduce natural, revealing midrange detail.
Maintains control over the cone as cone as it moves, supporting clean output and improved mid-bass performance.
Compact and powerful magnet structures provide efficient performance while keeping the speaker installation depth practical.
Dedicated high-frequency drivers support improved stereo imaging and more detailed sound across the dashboard.
Check Your Vehicle
Alpine officially lists the following BMW vehicles for the DP2-45C-B:
| BMW Series | Model | Body Style | Production Dates |
|---|---|---|---|
| 3 Series | G20 | Saloon | November 2018–August 2024 |
| 3 Series | G21 | Touring | July 2019–July 2024 |
| M3 | G80 | Saloon | November 2020–July 2024 |
| M3 | G81 | Touring | November 2022–July 2024 |
| 4 Series | G22 | Coupé | July 2020–March 2024 |
| 4 Series | G23 | Convertible | November 2020–March 2024 |
| 4 Series | G26 | Gran Coupé | July 2021–July 2024 |
| M4 | G82 | Coupé | November 2020–July 2024 |
| M4 | G83 | Convertible | July 2021–March 2024 |
Further Details
| Speaker Type | 2-way component |
|---|---|
| Midrange Speaker Size | 12cm / 4.5 inches |
| Tweeter Size | 2.5cm / 1 inch |
| RMS Power Handling | 50 watts |
| Peak Power Handling | 100 watts |
| Frequency Response | 90Hz–20kHz |
| Midrange Cone | Woven carbon-fibre hybrid |
| Tweeter Dome | Tetoron soft dome |
| Surround | Alpine HAMR Multi-Roll |
| Magnet Material | Neodymium |
| Vehicle Integration | BMW-specific plug-and-play |
| Typical Installation | Compatible BMW front doors |
Alpine DP2-45C-B vehicle-specific 2-way component speaker set for compatible BMW installations.
The DP2-45C-B is designed to integrate with compatible BMW factory audio systems. The improvement achieved will depend on the vehicle’s original audio specification, amplification and speaker configuration.
Component speakers use separate midrange drivers and tweeters. This allows the high-frequency drivers to be installed closer to ear level, helping create clearer detail and improved stereo imaging. BMW models without suitable tweeter locations may require additional original-style tweeter housings.
Expert Guidance
The DP2-45C-B is an excellent choice for BMW owners who want more clarity, detail and controlled mid-bass while keeping a discreet factory-style installation. For the best overall improvement, consider the complete system rather than upgrading only the front door speakers. Matching BMW-specific under-seat subwoofers and suitable amplification can provide stronger bass, greater output and better tonal balance throughout the cabin.
Upgrade Your BMW Audio
Choose the Alpine DP2-45C-B for premium front component-speaker performance, BMW-specific integration and a discreet factory-style installation.
Brand: Alpine
Car models: The years stated refer to the model's years of manufacture, please check the item description for information about any changes there may be within these productions years.
BMW - 3 Series (G20/G21)* (2019 >)
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