Free Shipping on all orders over $25!

Alpine SWA-12S4 12" Subwoofer Driver

  • 12" 4 ohm Subwoofer
  • 8 Gauge Push Terminals
  • P.W.R. Cone Design

Availability: In stock

Regular Price: $129.99

Now: $74.96


FREE Shipping on orders
over $25

30 Day No Hassle Returns*

Call 1-888-CARTOYS

Need it installed?
See our rates | Visit a store

See what gear fits your ride. 
Car Stereo Fit Guide


Alpine SWA-12S4

12" Subwoofer Driver 4 ohm

Subwoofers That Pay Homage To The Power And Energy That Bass Adds To Music

BASSLINE™ subwoofers were born from the collaboration between Alpine and Far East Movement, sharing one thing that is true to our hearts – music you can feel. Building on Alpine’s long heritage in subwoofer engineering, we assigned our best and brightest engineers to work with Far East Movement to create a subwoofer line that could spread our passion for deep, hard-hitting bass while being budget-friendly for anyone to enjoy. These subwoofers will keep your wallet light, your bass heavy and will let your music Play Strong.


  • 12” 4O Subwoofer
  • Power Handling: 250W – 750W
  • Progressive Wavelet Ribs (P.W.R.) Cone Design
  • High Strength Custom Steel Frame
  • Great complement to V-Power Mono Amplifiers

The New Standard In Its Class

These subwoofers make a statement with their bold new cosmetic look. The dust cap features a BASSLINE logo printed in matte silver, and there’s a raised Alpine logo on the trim ring.

P.W.R.™ Cone Design

The SWA’s patent-pending Progressive Wavelet Ribs (P.W.R.) cone design helps break up standing waves and cone resonances to keep distortion low and musical enjoyment high.

Leading the Class With Output

Get the bass you can not only hear, but also feel. Through its optimized suspension design and new cone materials, this subwoofer allows over 52mm peak-to-peak cone travel.

Polypropylene and Mica Damped Cone Assembly, with Poly-Foam Surround

BASSLINE subwoofers use a polypropylene and mica damped cone assembly, which keeps the cone stiff and light for great sounding bass tones. The high-excursion poly-foam surround provides high output bass.

Progressive Polyester Spider

The progressive polyester spider provides accurate control of the subwoofer cone.

Two-Piece Yoke

The two-piece yoke uses a vented pole, to provide improved air flow and help with the cooling of the voice coil.

High Strength Steel Frame

With such a highly efficient airflow system we have incorporated a custom shaped high strength steel frame to help keep woofer performance accurate.

8-Gauge Push Terminals

Keeping power consistent to your subwoofers is just as important as keeping them cool. The BASSLINE subwoofers use 8-gauge push terminals for easy connection to speaker wires.

Easy System Building with V-Power Amplifiers

BASSLINE subwoofers make a great match with V-Power amplifiers. The amplifiers are known for their reliability, small size and big power output. When used with the BASSLINE subwoofers, you get a strong sound system at a friendly price. BASSLINE subwoofers and V-Power amplifiers can even be added to a factory radio, to provide an easy and impactful bass boost to the existing sound system.

Additional Info

Name Alpine SWA-12S4 12" Subwoofer Driver
Manufacturer Alpine
Manufacture's Warranty 2 N/A
Manufacturer's Warranty 1 Year Manufacture's Warranty
upc 793276012548
Manufacturer Sku SWA-12S4
Speaker Dimensions 12 inch subwoofer
Power Handling (Watts RMS) 250 W
Power Handling (Watts Peak) 750 W
Impedance (Ohms) 4ohms
Sensitivity 87.6 dB
Woofer Composition Polypropylene and Mica
Woofer Surround Foam
Cutout Diameter (in) 10-9/16 in
Top-mount Depth (Inches) 5-1/2 in
Vas (Liters) 67.8
Fs (Hz) 30Hz
Qts 0.49
Xmax (mm) 10
Woofer Displacement (in) 0.09