About the Alpine SWA-10S4
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Alpine's BassLine subwoofers will add some serious rumble to your vehicle's sound system. You'll really feel the impact of bass lines and drum beats, so you can get into your music like you never have before. These subs also live up to Alpine's reputation for making subs that bass lovers want, but they don't cost so much that you end up actually living in your car.

The tough steel frame helps to keep your bass punchy and accurate.
Built Alpine tough
Alpine's BassLine SWA-10S4 10” sub comes equipped with a rigid polypropylene/mica cone that won't flex under high volumes and cause distortion, while its poly-foam surround will last for years to come. The tough steel frame offers the stability you need to keep the bottom tight during intense bass sessions. This sub handles up to 250 watts RMS and its 4-ohm impedance makes it a great match for most amplifiers.
Need an amp for this sub? Check out this Crutchfield-approved bass package.
To drive this single subwoofer, we recommend a mono amplifier rated between 200 and 375 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.
Product highlights:
- 10" subwoofer with 4-ohm voice coil
- polypropylene and mica cone with poly-foam surround
- frequency response: 24-200 Hz
- power handling: 50-250 watts RMS
- peak power: 750 watts
- sensitivity: 86.5 dB
- top-mount depth: 5-5/16"
- sealed box volume: 0.65-1.0 cu. ft
- ported box volume: 1.0-1.75 cu. ft.
- warranty: 1 year
- Our 60-day money-back guarantee
- MFR # SWA-10S4
What's in the box:
Alpine SWA-10S4 owner's manual
- One 10" Single voice coil subwoofer
- Adhesive backed foam gasket
- SWA Subwoofer Application Guide (English/ French)
- On-line product registration information (English/ French/ Spanish)
- Warranty information (English/ French)
- Important Notice! (English/ French)
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More details on the Alpine SWA-10S4

Features & specs
Size | 10 -inch | |
Impedance | Other | |
Cone Material | Polypropylene and Mica | |
Surround Material | Foam | |
Ideal Sealed Box Volume (cubic feet) | 0.83 | |
Ideal Ported Box Volume (cubic feet) | 1.51 | |
Port diameter (inches) | N/A | |
Port length (inches) | N/A | |
Free-Air | No | |
Dual Voice Coil | No | |
Sensitivity |
86.5 dB at 1 watt | |
Frequency Response | 24 - 200 Hz | |
Max RMS Power Handling | 250 | |
Peak Power Handling (Watts) | 750 | |
Top Mount Depth (inches) | 5 1/4 | |
Bottom Mount Depth (inches) | N/A | |
Cutout Diameter or Length (inches) | 8 15/16 | |
Vas (liters) | 41 | |
Fs (Hz) | 32 | |
Qts | 0.42 | |
Xmax (millimeters) | 10 | |
Parts Warranty | 1 Year | |
Labor Warranty | 1 Year |
Product Research
Features
Enclosure Compatibility
Features
PWR Cone Design: This BassLine subwoofer's patent-pending Progressive Wavelet Ribs (PWR) cone design helps break up standing waves and cone resonances to keep distortion low. The sub uses a polypropylene and mica damped cone assembly and a high-excursion poly-foam surround.
Progressive Polyester Spider: The progressive polyester spider provides accurate control of the subwoofer cone motion.
Two-Piece Yoke: The two-piece yoke uses a vented pole to provide improved air flow and help cool the voice coil.
Spring Terminals: The spring post terminals accept pin connectors, single or dual banana plugs, or bare wire up to 8 gauge.
Enclosure Compatibility
Sealed Box Volume: The recommended sealed box volume range is from 0.65 cubic feet to 1.0 cubic feet, with 0.83 cubic feet being the ideal size.
Ported Box Volume: The recommended ported box volume range is from 1.0 cubic feet to 1.75 cubic feet. The ideal size is 1.51 cubic feet, using a slot port measuring 10-1/2" (W) x 1" (H) x 17" (L).
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