Alpine S2-W12D4 Sub 12" 30cm S Series Subwoofer Dual 4 Ohm Voice Coils 600w RMS

The Alpine S2-W12D4 is a 12-inch (30cm) subwoofer from Alpine's S Series range, featuring dual 4 ohm voice coils and rated at 600W RMS (1800W peak). It uses a carbon fibre and polypropylene cone with a High Amplitude Multi-Roll (HAMR) rubber surround, and suits both sealed and ported enclosures.

Key specifications

• Size: 12-inch (30cm)
• Power: 600W RMS, 1800W peak
• Impedance: dual 4 ohm voice coils
• Frequency response: 23Hz–215Hz
• Sensitivity: 86.2dB (1W/1m)
• X-Max (1-way): 15mm
• Sealed box volume: 17.3–34 litres
• Ported box volume: 30–45.3 litres
• Grille: not included

The New 2023 S-Series Subwoofers

The S2-W12D4 is part of Alpine's redesigned next-generation S-Series subwoofer line, built to deliver powerful, reliable bass at an accessible price. Alpine has applied technology from its higher-end subwoofers to bring depth and punch without the premium cost.

The S2-W12D4 handles up to 600W RMS, so you can drive it hard. The cone combines carbon fibre and polypropylene for a light yet sturdy construction, while the rubber HAMR surround enables maximum excursion. Configuration jumpers let you switch between 2 ohm and 8 ohm impedance to suit your setup. The sub works in both sealed and ported enclosures — tight and precise or big and boomy, depending on your preference.

Performance & Value

With 600W RMS and 1800W peak power handling, a frequency response of 23Hz–215Hz, and a sensitivity of 86.2dB (1W/1m), the S2-W12D4 delivers strong, accurate bass across a wide range of music genres.

HAMR Surround

Alpine's High Amplitude Multi-Roll (H.A.M.R.) surround technology uses a rubber surround that allows the cone to move air efficiently while keeping temperatures down. It provides 15mm of one-way excursion for accurate, controlled bass output.

Enhanced Punch

The lightweight carbon fibre and polypropylene cone delivers deep, low-distortion bass, adding richness and depth to your music.

Flexible Application

The Dual Voice Coil (DVC) design with easy configuration jumpers simplifies installation. A twist-lock grille mounting system allows an optional grille to be fitted and removed without screws.

Perfect Power Match

The S2-W12D4 is power-matched to Alpine's S-Series amplifiers. A single sub pairs neatly with the 600W S2-A60M mono amplifier. For a bigger setup, two or more S2-W12D4 subs can be driven by the 1200W S2-A120M amp. You can also add an Alpine RUX-KNOB2 remote bass level control for convenient level adjustment from the driver's seat.

Sizes & Variations

The S-Series subwoofer range is available in 12", 10" and 8" sizes, in both dual 2Ω and dual 4Ω impedance options. If you need more headroom, the Alpine R2-W12D2 is a 12" R Series subwoofer rated at 750W RMS with dual 2 ohm voice coils.

Made for S-Series Amps & Subs

The S-Series speakers are designed to work together with Alpine's S-Series amplifier and subwoofer line for complete system building. S-Series components are aimed at those who want a great-sounding system without overspending, with Hi-Res Audio capability included.