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"Fit perfectly and worked exactly as expected — support was excellent."
Alpine S2-W8D4
Upgrade Your Vehicle With Confidence. This Is Built to Fit, Perform, and Last
Real installer support before and after purchase
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Full Manufacturer 2 Years Warranty
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Alpine S2-W8D4 8-Inch S-Series Subwoofer
Product Overview:
The Alpine S2-W8D4 is a redesigned, next-generation 8-inch subwoofer that brings high-end technology to a budget-friendly price point. It is specifically engineered to provide noticeable audio upgrades in vehicles where space is limited, such as hatchbacks or under-seat installations. With Dual 4-Ohm Voice Coils, this driver offers flexible wiring configurations for easy integration into various amplifier setups.
Key Features
Advanced Material Construction
The S2-W8D4 features a cone built from a lightweight yet rigid carbon fiber and polypropylene blend. This material ensures fast response and deep, low-distortion bass. To ensure long-term reliability, it includes a polypropylene and ceramic dust cap that maintains structural integrity even under high-power demands.
HAMR Surround Technology
Equipped with Alpine's proprietary High-Amplitude Multi-Roll (HAMR) rubber surround, this 8-inch driver can move a significant amount of air while staying cool and stable. This design allows for 13mm of one-way linear excursion, delivering a punchy and accurate performance that rivals larger subwoofers.
Simplified Wiring with Pro Jumpers
The dual 4-ohm voice coil design includes pre-installed configuration jumpers, allowing customers to easily switch between a 2-ohm (parallel) or 8-ohm (series) load. This feature simplifies the installation process and ensures the subwoofer can be perfectly matched to the output of a mono amplifier.
Versatile Mounting & Protection
Designed for shallow-depth applications, the S2-W8D4 has a top-mount depth of only 3-3/4 inches. It also features a unique twist-lock grille mounting system, allowing customers to add an optional protective grille without the need for extra screws, maintaining a sleek and professional appearance.
Technical Specifications
| Category | Specification |
| Performance | |
| Subwoofer Size | 8-Inch |
| Power Handling | 300W RMS / 900W Peak |
| Nominal Impedance | Dual 4-Ohm |
| Frequency Response | 23Hz – 215Hz |
| Sensitivity (1W/1m) | 82.7 dB |
| X-Max (1-Way) | 13 mm |
| Dimensions | |
| Mounting Depth | 3-3/4" |
| Cutout Diameter | 6-15/16" |
| Magnet Weight | 34 oz |
| Voice Coil Diameter | 1.4" |
| Enclosure Recs | |
| Ideal Sealed Box | 0.30 cubic feet |
| Ideal Ported Box | 0.61 cubic feet |
| Tuning Frequency | 35Hz (Ported) |
- Ships within 1–3 business days from our warehouse
- Tracking included with every order
- Free 30-day returns if it doesn’t work for your setup
- 2-year manufacturer warranty
- Authorized dealer guarantee
- Real installer-backed support before and after purchase
Alpine S2-W8D4
Sale price$209.95
Why This Upgrade Makes Daily Driving Better
Ease of Use & Safety
Hands-free control reduces distraction and frustrationwhile driving.
Expandable by Design
Add backup cameras, better speakers, amps, or subsanytime.
FITMENT & INSTALLATION MADE SIMPLE
WHAT VEHICLES IT WORKS WITH
FIND THE RIGHT PRODUCT FOR YOUR EXACT VEHICLE
We verify compatibility before you buy, no guesswork.
DIY FRIENDLY IF:
- You're comfortable with basic tools
- You follow provided instructions
PROFESSIONAL INSTALL RECOMMENDED IF:
- Your vehicle requires dash kits or wiring adapters
- You want a turnkey experience
INSTALLATION CREDIT & SUPPORT:
- $75 Installation Credit when purchased online
- Speak to real installers before you buy
- Bring it into one of our locations for install
40 Years of Installation Experience
Tens of Thousands of Installs Completed
Authorized Dealer Full Warranties
Why Buying This Here Is Safer Than Anywhere Else
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Easy Returns
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Physical stores & real installers
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FREQUENTLY ASKED QUESTIONS
FREQUENTLY ASKED QUESTIONS
How do I know this stereo or speaker will fit my car?
Select your year, make, and model using the Vehicle Fit Guide at the top of the page. You’ll only see products that are compatible with your exact vehicle setup.
What happens if I order something that doesn’t fit?
You can return or exchange it within 30 days. We’ll help you identify the correct part for your vehicle so you don’t have to guess again.
Are these products brand new and covered by warranty?
Yes — all products are brand new, authentic, and sold as an authorized dealer, which means they include a full manufacturer warranty.
Can you install this for me, or do I need to do it myself?
You can do either. Install it yourself, or use your $75 installation credit at our shop and have it professionally installed by our team.
What if I don’t know what to choose for my car?
Tell us your vehicle and what you want to improve (sound, bass, CarPlay, etc.). We’ll recommend the exact products that fit your car and your budget.
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