Alpine W12S4 Subwoofer 12 Inch
- Subwoofer Diameter: 12 inches
- Audio Driver Size: 12 inches
- Woofer Diameter: 12 inches
- Speaker Size: 12 inches
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A 500 watt car audio subwoofer driver that needs a separate amplifier and enclosure to run, not a standalone, plug-in unit.
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ASIN: B06XGRK84GModel: W12S4Category: Subwoofers
Overview
The Alpine W12S4 is a 12-inch subwoofer rated at 500 watts with RCA connectivity, built for car audio systems that need low-end output.
This W-Series driver is a 12-inch subwoofer designed to be wired into an amplifier through its RCA input rather than run directly off a head unit. The listed mounting is door mount, and at roughly 13 x 14.5 x 17 inches and 10 lb it is sized for typical vehicle installs. It is the driver itself, so an enclosure and amplifier are needed to complete the setup.
- 12-inch subwoofer driver
- 500 watt power rating
- RCA connectivity
- 10 lb, car audio mounting
Who it's for
Car audio installers or enthusiasts adding low-frequency output to an existing amplified system. Not a home theater subwoofer and not a complete plug-and-play unit.
Pros and cons
- 500 watt power handling
- 12-inch driver size for strong low end
- RCA input for amplified systems
- Requires a separate amplifier and enclosure
- Not a self-contained or plug-and-play subwoofer
Performance notes
The 12-inch driver is rated for 500 watts and connects via RCA, meaning it needs an external amplifier to produce output rather than running passively off a stereo. As a bare driver it also requires an enclosure sized to the manufacturer's specification to perform as intended.
Specifications
| Brand | Alpine |
|---|---|
| Model | W12S4 |
| Dimensions & fit | |
| Subwoofer Diameter | 12 incheshigher than 63% of 28 subwoofers |
| Audio Driver Size | 12 incheshigher than 71% of 32 subwoofers |
| Woofer Diameter | 12 incheshigher than 74% of 28 subwoofers |
| Speaker Size | 12 incheshigher than 59% of 23 subwoofers |
| Weight | 10 poundslower than 85% of 56 subwoofers |
| Item Dimensions D X W X H | 13.4 × 14.5 × 17 inches |
| Tweeter Diameter | 1 inch |
| Capacity & performance | |
| Speaker Maximum Output Power | 500 wattshigher than 57% of 38 subwoofers |
| Audio Output Mode | Surround |
| Age Range Description | Adult |
| Power & efficiency | |
| Power Source | Corded Electric |
| Number Of Power Levels | 1 |
| Battery Average Life | 5 hours |
| Construction & materials | |
| Enclosure Material | Polycarbonate (PC) |
| Color | Black |
| Compatibility & installation | |
| Connectivity Technology | RCA |
| Connectivity Protocol | RCA |
| Subwoofer Connectivity Technology | Wired |
| Mounting Type | Door Mount |
| Compatible With Vehicle Type | & SUVs, Select Cars, Truck |
| Compatible Devices | Car / Truck |
| Included components | |
| Unit Count | 1 |
| Warranty & support | |
| Warranty Type | Limited |
| Warranty Description | 1 year |
| Other details | |
| Speaker Type | Subwoofer |
| Control Type | Push Button, Touch |
| Audio Driver Type | Dynamic Driver |
| Number Of Audio Channels | 2 |
| Is Waterproof | No |
| Water Resistance Level | Not Water Resistant |
| Number Of Items | 1 |
| Mp3 Player | No |
| Additional Features | Adjustable Strap |
| Antenna Location | Motorcycling |
| Builtin Media | W12S4 |
| Specific Uses For Product | For Home Audio Systems, Car Audio Systems |
| Frequency Response | 200 Hz |
| Wireless Technology | No Wireless Communication Technology |
| Impedance | 4 ohms |
Closest rivals on specs
Monoprice SW-12 12" Powered Subwoofer- Weight 10 vs 25 pounds (-60%)
- Speaker Maximum Output Power 500 vs 600 watts (-17%)
SVS SB-1000 Pro Sealed Subwoofer- Speaker Maximum Output Power 500 vs 325 watts (+54%)
Frequently asked questions
Is the Alpine W12S4 a complete subwoofer system?
No, it's a 12-inch driver that needs a separate amplifier and enclosure.
What size is the Alpine W12S4 driver?
12 inches.
How does the W12S4 connect to an amplifier?
Through an RCA input.