Alpine W12S4 BassLine Series 12" 250W RMS (750W Peak Power Handling) at 4 Ohms, Single Voice Coil Component Car Subwoofer
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What's Inside?
- • 12" Single Voice Coil Component Car Subwoofer
- • Adhesive backed foam gasket
- • Application Guide (English/ French)
- • On-line product registration information (English/ French/ Spanish)
- • Warranty information (English/ French)
- • Important Notice! (English/ French)
- • Owner's Manual
Why Choose Alpine W12S4 Component Car Subwoofer?
Big Bass Without the Big Price
The Alpine W12S4 12-inch Bass Series subwoofer is a great choice if you want deeper, stronger bass without going overboard on power or budget. With 250W RMS and 750W peak power handling, this single 4-ohm voice coil subwoofer is built for everyday car audio systems that want noticeably more low-end punch. It is a solid upgrade for music lovers who want their bass to hit harder and sound fuller.
Simple Power, Serious Bass
The W12S4 keeps things simple with a single 4-ohm voice coil, making it easy to pair with a compatible mono amplifier. Match it with an amp like the Alpine S2-A60M and you have a clean, well-balanced setup that can deliver tight bass without requiring a massive electrical system. Whether you're listening to hip-hop, EDM, rock, or anything with a strong low end, this 12-inch Alpine subwoofer gives your system the extra bass impact you're looking for.
Your Everyday Alpine Bass Upgrade
If you want a reliable 12-inch car subwoofer that delivers solid bass without taking over your entire vehicle, the Alpine W12S4 is an easy choice. Its practical power rating, 4-ohm design, and Alpine build quality make it a versatile option for sealed or ported enclosure setups. Pair it with the right amplifier and enclosure, set the gain correctly, and the W12S4 can turn an ordinary factory or aftermarket system into a much more satisfying bass setup.
Alpine 12-Inch Subwoofer Comparison Chart | S2-W12 vs R2-W12 vs RS-W12 vs HDZ-W12 vs W12S4
| Ultimate Alpine 12" Subwoofer Performance Comparison |
Alpine S2-W12D4 / S2-W12D2
Next-Gen S-Series 12" Subwoofer – Powerful Bass
BEST VALUE
- • 12" S-Series Subwoofer
- • 600W RMS / 1,800W Peak
- • DVC 4Ω or DVC 2Ω options
- • 15mm X-Max
- • Excellent daily-driver bass
- • Great performance for the price
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Alpine R2-W12D4 / R2-W12D2
Next-Gen R-Series 12" Subwoofer – High-Output Bass
HIGH PERFORMANCE
- • 12" R-Series Subwoofer
- • 750W RMS / 2,250W Peak
- • DVC 4Ω or DVC 2Ω options
- • 20mm X-Max
- • High-output bass performance
- • Ideal for serious car audio builds
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Alpine RS-W12D4 / RS-W12D2
R-Series Shallow 12" Subwoofer – Powerful Bass in a Slim Design
SHALLOW PERFORMANCE
- • 12" R-Series Shallow Subwoofer
- • 600W RMS / 1,800W Peak
- • DVC 4Ω or DVC 2Ω options
- • 20mm X-Max
- • 3.25" shallow mounting depth
- • Ideal for space-limited installations
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Alpine HDZ-W12
Alpine Status 12" Subwoofer – Premium Bass & High-Power Performance
PREMIUM PICK
- • 12" Alpine Status Subwoofer
- • 800W RMS / 2,400W Peak
- • 20mm X-Max
- • Premium carbon-fiber dust cap
- • Cast-aluminum frame construction
- • Designed for premium systems
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Alpine W12S4
12" Single Voice Coil Subwoofer – Affordable Bass Upgrade for Entry-Level
BUDGET PICK
- • 12" Single Voice Coil Subwoofer
- • 250W RMS / 750W Peak
- • Single 4Ω voice coil
- • 5.31" mounting depth
- • Simple amplifier pairing
- • Great for entry-level systems
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Alpine W12S4 Highlights
POWERFUL BASS
250W RMS Power Handling
Bring deep, powerful bass to your car audio system with 250 watts RMS power handling and up to 750 watts of peak power.
12" BASS PERFORMANCE
Deep, Hard-Hitting Bass
The 12-inch woofer delivers strong low-frequency output and impactful bass that adds more excitement to your favorite music.
SINGLE VOICE COIL
Single 4-Ohm Voice Coil
The single 4-ohm voice coil provides a simple setup and makes it easy to match the subwoofer with a compatible amplifier.
DURABLE CONSTRUCTION
Mica-Injected Polypropylene Cone
The mica-injected polypropylene cone provides a strong and responsive design for clean, controlled bass performance.
FLEXIBLE SURROUND
Poly-Foam Surround
The flexible poly-foam surround supports smooth cone movement while helping deliver strong and consistent bass response.
ENCLOSURE READY
Sealed & Ported Enclosure Ready
Designed for use in both sealed and ported enclosures, giving you more flexibility when building your ideal car audio bass system.
DEEP FREQUENCY RESPONSE
22Hz–200Hz Frequency Range
A wide 22Hz–200Hz frequency response helps the W12S4 reproduce deep low bass and blend smoothly with the rest of your audio system.
Alpine W12S4 Recommended Amplifiers | Best 12" Bass Series Subwoofer Amp Pairings for Powerful Bass
Build Your Alpine Bass Series Subwoofer System
Real-world amplifier recommendations for the Alpine W12S4, with balanced power matches for strong, controlled bass
Amplifier Matching Overview
W12S4 Power Rating: 250W RMS / 750W Peak
Ideal Amp Range: Approximately 250W–350W RMS at 4Ω for a single subwoofer
W12S4: Single 4Ω voice coil configuration
Single-Sub Wiring: Connect the W12S4 directly to a mono amplifier stable at 4Ω
Best Alpine Setup: Alpine S2-A60M providing 330W RMS at 4Ω
Exact-Power Alternative: JL Audio JD500/1 providing 250W RMS at 4Ω
Best Overall Match – 330W RMS @ 4Ω
The S2-A60M is the best overall match for a single Alpine W12S4. The W12S4 has a single 4Ω voice coil, and the S2-A60M delivers 330W RMS at 4Ω. This gives the subwoofer useful amplifier headroom while staying close to its 250W RMS power rating. Proper gain adjustment helps keep the W12S4 within its recommended power range.
Exact-Power Alternative – 250W RMS @ 4Ω
The JL Audio JD500/1 is an excellent third-party match for the Alpine W12S4. It delivers 250W RMS at 4Ω, exactly matching the W12S4's 250W RMS power rating. Its mono Class-D design makes it an efficient choice for powering a single W12S4 with clean, controlled output.
Why the S2-A60M Is the Recommended Choice
Strong Power Match: The S2-A60M provides 330W RMS at 4Ω, giving the W12S4 useful amplifier headroom
250W RMS Subwoofer: The W12S4 is rated for 250W RMS, so the amplifier gain should be adjusted accordingly
Single 4Ω Voice Coil: The W12S4 connects directly to the amplifier at its 4Ω nominal impedance
S-Series Pairing: The S2-A60M keeps the amplifier within Alpine's current S-Series lineup
Class-D Design: The mono Class-D amplifier provides efficient power for a dedicated subwoofer system
Alternative Choice: The JL Audio JD500/1 provides an exact 250W RMS match at 4Ω
Recommended W12S4 Amplifier Settings
Gain Setting: Set the gain for clean output and avoid driving the W12S4 beyond its 250W RMS rating
Low-Pass Filter: Start around 80Hz and adjust according to the enclosure and front-stage response
Bass EQ: Keep bass boost moderate to avoid unnecessary stress on the subwoofer
Subsonic Filter: Use a subsonic filter with a ported enclosure, typically set below the enclosure's tuning frequency
Phase: Adjust phase for the strongest and smoothest bass integration with the vehicle's front speakers
Recommended W12S4 System Configurations
Single W12S4: Pair one W12S4 with the Alpine S2-A60M for a balanced single-subwoofer system
Best Alpine Power Match: Run the W12S4 at 4Ω with the S2-A60M producing 330W RMS
Exact-Power Alternative: Pair the W12S4 with the JL Audio JD500/1 for a 250W RMS match at 4Ω
Balanced Build: The S2-A60M provides enough power to get strong performance from the W12S4 without requiring an oversized amplifier
Third-Party Build: The JL Audio JD500/1 provides an exact RMS power match for users looking for a non-Alpine amplifier
Best Overall Build: Pair the W12S4 with the S2-A60M for a strong balance of power, efficiency and Alpine compatibility
Pro Tip: For a single Alpine W12S4, the S2-A60M is the strongest overall pairing. The W12S4 is a single 4Ω subwoofer rated at 250W RMS, while the S2-A60M delivers 330W RMS at 4Ω. If you prefer an exact-power alternative, the JL Audio JD500/1 provides 250W RMS at 4Ω. In either setup, properly set the amplifier gain for clean, controlled bass.
Frequently Asked Questions (FAQ)
- • What type of enclosure delivers the best bass performance?
The subwoofer performs well in both sealed and ported enclosures when built to the recommended internal volume. Choosing the correct enclosure design greatly improves bass response, efficiency, and overall sound quality.
- • Why does the bass sound weak even though everything is connected correctly?
Improper amplifier tuning, incorrect crossover settings, or an enclosure that is too small are common causes of reduced bass output. Adjusting the amplifier and verifying the enclosure specifications usually restores stronger low-frequency performance.
- • Can I use this with my factory stereo system?
Yes, it can be integrated into many factory audio systems when paired with a compatible amplifier and signal converter if needed. A properly installed amplifier allows the subwoofer to perform much better than relying on factory power alone.
- • Why does the subwoofer distort when I increase the volume?
Distortion is usually caused by amplifier clipping, excessive gain settings, or overpowering the subwoofer. Proper amplifier tuning and matching the amplifier's RMS output to the subwoofer help prevent distortion.
- • How much amplifier power should I pair with this?
An amplifier that closely matches the subwoofer's recommended RMS power rating will provide the best balance of output and reliability. Using the correct power level also helps prevent both underpowering and accidental speaker damage.
- • Why does the cone move very little while playing music?
This may happen if the low-pass crossover is set incorrectly or the amplifier isn't receiving a strong input signal. Reviewing the crossover settings and checking all signal connections usually restores normal cone movement.
- • Can I install two of these subwoofers in the same enclosure?
Yes, many enthusiasts install a pair to achieve greater bass output and improved low-frequency coverage. Just make sure the enclosure volume and amplifier are properly matched for the combined system.
- • Why does my trunk or vehicle interior rattle so much after adding this subwoofer?
The increased bass output can cause loose trim panels, license plates, and interior components to vibrate. Adding sound-deadening material and securing loose parts significantly reduces unwanted rattles.
- • Does this subwoofer need a break-in period before it reaches its full performance?
Yes, many users notice smoother and deeper bass after several hours of moderate listening. This allows the suspension components to loosen naturally and perform as intended.
Learn how to wire subwoofers
- Diameter : 12 Inch
- Sensitivity : 87.9 dB
- Impedance : 4 Ohm
- Frequency Response : 22-200 Hz
- Peak Power Handling : 750 Watts
- Shallow Mount : No Inch
- Number of Voice Coils : Single
- Suggested Sealed Box Volume : 1.09 Cubic ft.
- Suggested Ported Box Volume : 1.84 Cubic ft.
- RMS Power Handling : 250 Watts
Features:
- 12-inch Single 4Ω Subwoofer: Designed for powerful, deep bass performance in a range of enclosure setups.
- Polypropylene and Mica Cone with Poly-Foam Surround: Rigid and responsive cone construction for distortion-free low frequencies.
- Power Handling: Supports up to 250W RMS and 750W peak power for bold, clean bass reproduction.
- Frequency Range: Delivers rich lows from 22Hz to 200Hz, perfect for any genre of music.
- Mounting & Enclosure Compatibility: 5-5/16" mounting depth; works best in 1.09 cu. ft sealed or 1.91 cu. ft ported enclosures for versatile system design.
Specifications:
- Size: 12-inch
- Impedance (Ohms): 4
- Cone Material: Polypropylene and Mica
- Surround Material: Poly-Foam
- Basket Material: Steel
- Grille: None included
- Free-Air: No
- Dual Voice Coil: No
- Sensitivity: 87.9 dB at 1 watt
- Frequency Response: 22 – 200 Hz
- Max RMS Power Handling: 250 watts
- Peak Power Handling (Watts): 750 watts
- Top Mount Depth (inches): 5 5/16
- Bottom Mount Depth (inches): N/A
- Cutout Diameter or Length (inches): 10 9/16
- Frame Width: 12.6
- Frame Length: 12.6
- Vas (liters): 64.3
- Fs (Hz): 30
- Qts: 0.49
- Xmax (millimeters): 10
- UPC: 793276040541
- Weight: 11
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.
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Write a review!
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I have two 12s and the subs r amazing nice clean bass I give them 5 stars.
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Awesome sub. I’m a huge fan of Alpine subs now. Will probably buy more Alpine products in the next month. Maybe mids first before tweeters. But I’m really convinced that is the best brand in the market right now.
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A much cheaper sub from Alpine. No issues with the performance as its sound quality is one the best I’ve heard for some time now. I’m even shocked that its less than $100. Nice to know that you don’t have to break the bank anymore for a quality sub.
