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(2) Alpine W12S4 BassLine + MB Quart ZA2-1000.1D + Belva BAK42BK

(2) 12" BassLine Subwoofers 1000 Watt Amplifier and 4 Gauge Wiring Kit

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• 750W Max
• 250W RMS
• Polypropylene-Mica cone
• High-excursion poly-foam surround
• High-strength custom steel frame
• Progressive Wavelit Ribs (P.W.R.) cone design

Learn more about the w12s4_za210001d_pkg

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Description


MB Quart brand icon

Authorized dealer

Legendary Alpine quality at an affordable price

Car audio enthusiasts know that Alpine is the leader in technology and innovation. Their reputation for developing the most reliable products is legendary. The BassLine product line is a their quest to give customers a quality product that won't break the bank.

Surround and wattage match made in heaven

The 250 watts of continuous power that the W12S4 handles complements the poly-foam surround that Alpine went with. It provides the best sound quality money can buy at this price point.

General Features:

  • 12" Single 4 ohm BassLine (Bass) Series Subwoofer
  • Power Handling:
    • Peak: 750 watts
    • RMS: 250 watts
  • Recommended power range: 50W - 250W RMS
  • Polypropylene-Mica cone
  • High-excursion poly-foam surround
  • Progressive Wavelit Ribs (P.W.R.) cone design
  • Optional Alpine KTE-12PG subwoofer grill is available and is a wonderful complement to the trim ring with Alpine logo
  • High-strength custom steel frame
  • 8AWG push terminals
  • 2" voice coil
  • 52oz. magnet
  • Top-mount depth: 5-5/16"
  • Cutout diameter: 10-5/8"
  • Frequency Response: 22 - 200Hz
  • Sensitivity: 87.9dB
  • Resonance Frequency (Fs): 30
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
  • Priced Individually

Product history:

(newest, current model)
Alpine SWA-12S4 thumbnail
(previous model, replaced by (2) Alpine W12S4 BassLine + MB Quart ZA2-1000.1D + Belva BAK42BK)

Subwoofer Wiring Guide


Wiring Guide to Wire 1 (2) Alpine W12S4 BassLine + MB Quart ZA2-1000.1D + Belva BAK42BK Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 (2) Alpine W12S4 BassLine + MB Quart ZA2-1000.1D + Belva BAK42BK Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

Wiring Guide to Wire 3 (2) Alpine W12S4 BassLine + MB Quart ZA2-1000.1D + Belva BAK42BK Subwoofers

4 Channel Amp

Wiring Guide to Wire 4 (2) Alpine W12S4 BassLine + MB Quart ZA2-1000.1D + Belva BAK42BK Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp


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Specifications & Details


Subwoofer Specifications
Series
BassLine Series
Subwoofer Size
12"
Peak Power Handling
750 watts
RMS Power Handling
250 watts
Voice Coil(s)
Single
Impedance (Per Voice Coil)
4 ohm
Voice Coil Diameter
2"
Frequency Response
22 - 200 Hz
Sensitivity
87.9 dB
Xmax (millimeters)
10 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Woofer Composition
Mica Injected Polypropylene - MIPP
Woofer Surround
Poly-Foam
Subwoofer Grille
Optional (Accessory required and sold separately)
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Sealed
Optimum Sealed Box Volume
1.09 cubic feet
Optimum Ported Box Volume
1.91 cubic feet
Top-Mount Depth (Mounting Depth)
5-5/16"
Cutout Diameter
10-5/8"
Shallow Mount Installation
No
T/S Parameters (Electromechanical)
Free-Air Resonance (Fs)
30 Hz
Equivalent Compliance (Vas)
64.3 liters
Total Speaker Q Value (Qts)
.49
Electrical Q Value (Qes)
.53
Electrical Resistance of Voice Coil (Re)
3.7 ohm
Mechanical Q Value (Qms)
7.66
What is in the box?
Paperwork
User manual
Warranty/Registration card
WITB: Subwoofers
Subwoofer
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

W12S4 ZA210001D PGK

Weight:

33.00lbs

Internal SKU:

w12s4_za210001d_pkg

Internal Product ID:

143301

Customer Ratings & Reviews


(2) Alpine W12S4 BassLine + MB Quart ZA2-1000.1D + Belva BAK42BK thumbnail image

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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.