Modern Connectivity
Seamless Apple CarPlay® and Android Auto™ for navigation, music, and calls.
"Fit perfectly and worked exactly as expected — support was excellent."
Alpine S2-SB8
Upgrade Your Vehicle With Confidence. This Is Built to Fit, Perform, and Last
Real installer support before and after purchase
Price Match Guarantee
Full Manufacturer 2 Years Warranty
Free 30-Day Returns
Check Compatibility
Out of Stock
Ships within 1-3 days
Authorized Dealer Guaranteed
Alpine S2-SB8 8-Inch PrismaLink S-Series Subwoofer Enclosure
Product Overview:
The Alpine S2-SB8 is a compact 8-inch preloaded subwoofer enclosure that introduces the PrismaLink™ system, blending high-performance bass with customizable RGBW lighting. Despite its smaller size, this sealed wedge enclosure is engineered to deliver punchy and accurate low-end response, making it an excellent solution for vehicles where space is at a premium.
Features
Integrated RGBW Lighting
The S2-SB8 stands out with its built-in RGBW lighting bars integrated into the enclosure trim. You can choose from 12 static colors and 4 dynamic modes using the included IR remote. For advanced control, the lighting can be managed directly through the touchscreen of an Alpine iLX-W670 receiver (sold separately), allowing you to sync your audio and visual ambiance.
PrismaLink™ Multi-Link Capability
Designed for expandability, the S2-SB8 is multi-link capable. Using the optional KTX-LK8 linking bracket, you can physically connect two or more 8-inch enclosures together. This creates a unified, high-output subwoofer system with synchronized lighting that looks as professional as it sounds.
Next-Gen S-Series Performance
Inside the enclosure is the S2-W8D4 subwoofer, which features a carbon fiber and polypropylene blend cone. This material is both lightweight and rigid, allowing for high output with minimal distortion. Combined with Alpine’s High-Amplitude Multi-Roll (HAMR) surround, the driver achieves 13mm of linear excursion, providing an enhanced "punch" that is rare for an 8-inch driver.
Rugged and Versatile Design
The cabinet is constructed from 3/4" MDF and wrapped in premium black carpet to withstand the rigors of vehicle life. Its sealed wedge shape is optimized for tight, accurate bass reproduction and fits easily behind or under seats. The dual 4-ohm voice coils are pre-wired in parallel to a single terminal cup, presenting a 2-ohm final load for easy connection to your amplifier.
Full Specs:
| Category | Specification |
| General | |
| Subwoofer Size | 8-Inch |
| Power Handling | 300W RMS / 900W Peak |
| Nominal Impedance | 2-Ohm (Final) |
| Frequency Response | 35Hz – 215Hz |
| Sensitivity | 83 dB |
| Lighting | |
| Lighting Type | Integrated RGBW Trim Bars |
| Control | IR Remote (Included) or iLX-W670 |
| Lighting Modes | 12 Static, 4 Dynamic |
| Construction | |
| Enclosure Type | Sealed Wedge (3/4" MDF) |
| Cone Material | Carbon Fiber / Polypropylene |
| X-Max (1-Way) | 13mm |
| Dimensions | 12.5” W x 11” H x 9.25” D |
| Expansion | |
| Linking Kit | KTX-LK8 (Optional) |
| Optional Grille | KTE-8G.3 |
- 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-SB8
Sale price$399.95
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
 |
MARKETPLACES | |
|---|---|---|
|
Verified Vehicle Fit
|
||
|
Installer Support
|
||
|
Authorized Products
|
||
|
Easy Returns
|
||
|
Physical stores & real installers
|
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.
Free shipping
Free Shipping to the Lower 48 States
Customer service
Our Customer support and sales experts are always available to help
Secure payment
We accept Apple Pay, Paypal, and all major credit cards through our encrypted processor.