The Alpine W-SB12V combines a preloaded 12" Bass Series subwoofer with a high-output, precision-tuned vented wedge enclosure. Rated at 250 watts RMS with a 4-ohm impedance, it delivers deep, aggressive bass while fitting neatly against many rear vehicle seats.
Bring powerful, aggressive bass to your vehicle with the Alpine W-SB12V 12" Bass Series Wedg-E Vented Subwoofer Enclosure. This high-output enclosure comes preloaded with an Alpine W12S4 subwoofer and is engineered to deliver deeper bass extension and stronger low-frequency impact than many traditional compact subwoofer boxes.
Rated for 250 watts RMS and 750 watts peak, the W-SB12V provides dependable Alpine performance for cars, trucks, and SUVs. Its 4-ohm impedance works with a wide selection of mono amplifiers, while the wedge-shaped enclosure helps maximize cargo space and fit naturally against many rear seatbacks.
The Alpine W-SB12V combines a proven 12" Bass Series subwoofer with a high-output vented enclosure designed to deliver deep, aggressive bass. Its optimized design allows the system to produce strong low-frequency output while maintaining controlled performance at higher listening levels.
The larger 12" subwoofer moves more air than a comparable 10" model, making the W-SB12V an excellent choice for customers who want greater impact, stronger low-end extension, and a more physical bass experience.
The wedge shape is designed to align naturally with the angle of many rear vehicle seats. This allows the enclosure to use cargo space efficiently while directing powerful bass into the passenger compartment.
The angled cabinet also helps reduce internal sound-wave interference, contributing to tighter and more controlled low-frequency output. Its black carpet finish and embroidered Alpine logo give the enclosure a clean, professional appearance.
The W-SB12V features a precision-tuned vented design with a curved port engineered to improve airflow and enclosure efficiency. This design helps produce deeper bass extension and greater output than many similarly sized sealed enclosures.
Optimized internal volume and port tuning allow the included subwoofer to perform consistently under pressure, giving the system the authority needed for bass-heavy music without requiring a custom-built enclosure.
The included Alpine W12S4 subwoofer uses a lightweight polypropylene-mica cone designed to remain rigid during demanding bass passages. This helps reduce unwanted cone flex and supports cleaner, more controlled low-frequency reproduction.
A durable poly-foam surround allows the cone to move freely while maintaining stability. The subwoofer's single 4-ohm voice coil makes amplifier selection straightforward and compatible with many popular mono amplifiers.
The Alpine W-SB12V gives you the convenience and predictable performance of a factory-engineered loaded enclosure while still allowing you to choose the amplifier that best fits your vehicle and listening preferences.
Unlike a powered subwoofer, the W-SB12V does not contain a built-in amplifier. It requires a compatible external amplifier, properly sized wiring, audio-signal integration, and professional tuning for best performance.
| Model | Alpine W-SB12V |
| Included Subwoofer | Alpine W12S4 Bass Series |
| Subwoofer Size | 12" |
| Enclosure Type | Vented / ported wedge enclosure |
| RMS Power Handling | 250 watts RMS |
| Peak Power Handling | 750 watts peak |
| Voice Coil | Single 4-ohm voice coil |
| Final Impedance | 4 ohms |
| Frequency Response | 22 Hz–200 Hz |
| Sensitivity | 88 dB |
| Cone Material | Polypropylene-mica |
| Surround Material | Poly-foam |
| Enclosure Construction | MDF with premium black carpet finish |
| Enclosure Dimensions | 17.5" W × 20.5" D × 17.5" H |
| Enclosure Weight | 44 pounds |
| Approximate Enclosure Volume | 44 liters |
| Protective Grille Compatibility | Alpine KTE-12PG, sold separately |
| Recommended Amplifier | Alpine S2-A60M mono amplifier |
| Built-In Amplifier | No — external amplifier required |
The Alpine W-SB12V is a passive subwoofer enclosure and does not include a built-in amplifier. A compatible mono amplifier, amplifier wiring kit, audio-signal connection, mounting hardware, and installation labor are required for operation.
Alpine recommends pairing the enclosure with the S2-A60M mono amplifier. Final amplifier selection should consider the vehicle, factory or aftermarket radio, desired output level, available electrical capacity, and any future system upgrades.
The W-SB12V is compatible with the Alpine KTE-12PG protective grille, sold separately. Adding the grille is recommended for vehicles where cargo, tools, groceries, sports equipment, or other objects may come into contact with the subwoofer cone.
Professional installation helps ensure the amplifier receives properly sized power and ground wiring, appropriate circuit protection, a clean audio signal, secure enclosure mounting, and correct system tuning.
Incorrect gain, crossover, subsonic-filter, or bass-boost settings can cause distortion and potentially damage the subwoofer. Our technicians can install and tune the system for strong, clean, and dependable bass performance.
Purchase your Alpine W-SB12V from Access 1 Alarm & Audio, Cleveland, Ohio's premier mobile electronics shop. We have served Cleveland and Northeast Ohio for over 20 years with professional car audio installation, factory-radio integration, security systems, remote starters, and mobile electronics upgrades.
Amplifier, protective grille, wiring, integration components, installation materials, and labor are additional unless specifically included with your purchase.
| Subwoofers | |
|---|---|
| Subwoofer Brand | Alpine |
| Subwoofer Size | 12" |
| Power Handling RMS/MAX | 250/750 |
| Number of Voicecoils | Single |
| Final Subwoofer Impedance | 4 Ohm |
| Subwoofer Cone Material | PolyProplyne |
| Subwoofer Basket Material | Stamped Steel |
| Subwoofer Surround Material | Rubber |
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