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Product Details: SWE1243+12SV2.5+K1

Package: Brand New Alpine SWE1243 12” Single 4 Ohm 750 Watts Type-E Series Car Subwoofer + Atrend 12SV2.5 Single 12" Ported/Vented Subwoofer Enclosure Box/2.50 Cubic Feet Volume + Sub Box Wire Kit With 14 Gauge Speaker Wire + Spade Terminals

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Item Code: SWE1243+12SV2.5+K1
Warranty: 1 YEAR

Package Deal Includes:

  • (1) Alpine 12" subwoofer
  • Atrend top of the line single 12" ported/vented sub enclosure
  • 10 Drywall Wood Screws (Wood screws are the type of screws; the screws are actually made of metal)
  • 12 Feet of 14 AWG Blue Speaker Wire
  • 2 Spade Terminals

This is a complete single "12" subwoofer package. This is packaged with our big 2.5 cubic feet enclosure. This will make the sub pound like crazy! This sub requires big air space to get the most power handling out of it. This is the perfect enclosure to get the power you are looking for! We estimate this sub will hit 30 % harder in this enclosure versus a smaller enclosure.

Description for Alpine sub

Alpine SWE1243
Alpine's Type-E subwoofers combine low-profile design with superior power handling, to pump out powerful bass in your vehicle's hard-to-fit spaces.

The SWE-1243 12” subwoofer handles up to 250 watts RMS. The dual layered pulp-cone is treated with Kevlar for an undistorted performance even in extreme conditions. These 4 ohm subwoofers make use of Santropene rubber surrounds to keep the cone under control for a more accurate bass. The extra venting increases air flow through the speaker and dissipates heat to maximize the sub’s reliability. The heavy-gauge, stamped steel cage construction allows a tight bass output. The Alpine SWE-1243 Type-E subwoofer comes with a high impact protective grille. The black plastic grille snaps onto the woofer without the need for any additional hardware. Alpine makes use of the Concealed Mount Gasket System covers the mounting screws for a clean look.


  • 12" Single 4 Ohm Type-E Series Subwoofer
  • Peak Power Handling: 750 watts
  • RMS Power Handling: 250 watts
  • Woven fiber with Kevlar reinforced pulp cone woofer
  • Santoprene rubber surround
  • Protective grille included
  • Concealed mount gasket system
  • 16-gauge Insulated stranded leads
  • 8-gauge push-terminals
  • Airflow optimized with extended vented pole
  • FEA optimized design with compound radii
  • Woofer Composition: Woven Fiber with Kevlar Reinforced Pulp
  • Woofer Surround: Santoprene Rubber


  • Sensitivity: 86 dB
  • Frequency Response: 27 - 1000 Hz
  • Peak Power Handling: 750 watts
  • RMS Power Handling: 250 watts
  • Impedance (per voice coil): 4 ohms
  • Xmax (millimeters): 11.7 mm
  • Top Mount Depth: 5-5/8"

Description for Atrend Enclosure

Atrend 12SV2.5
The 12SV2.5 is a single 12" ported/vented subwoofer enclosure, which rides on Atrends’ expertise of manufacturing superior quality components with an attention to detailing. The front panel of the box is made from thick 1” MDF wood, while the rest of the box features ¾” superior-grade MDF construction. The sturdy construction promises improved sound quality with minimal distortion from the sub, without warping or breaking of the wood over time.

Unlike other imperfectly shaped enclosures, Atrend makes sure that the cut-out front provides effortless precision to house your subs. The Atrend 12SV2.5 subwoofer enclosure assures unmatched dependability with reliable performance.


  • Single 12" ported/vented subwoofer enclosure
  • Volume per sub: 2.50 cubic feet
  • Machine precision cut mounting holes
  • 3/4" heavy Dusty Construction
  • Multi layers of high-grade glue ensure long life and no air leaking out
  • High quality spring loaded terminals
  • Dado end panels
  • Mounting Depth: up to 16.50" (enough depth for any sub on the market)
  • Designed, tested, and engineered to work with most of today’s popular woofers. These enclosures are built with the quality additives needed to maximize the performance of any sound system.


  • Dimensions in inches:
    • Width : 20.00"
    • Height : 16.00"
    • Top depth : 18.00"
    • Bottom Depth : 18.00"

You also Get:

Complete Single Subwoofer Enclosure Installation Kit!


  • 10 Drywall Wood Screws (Wood screws are the type of screws; the screws are actually made of metal)
  • 12 Feet of 14 AWG Blue Speaker Wire
  • 2 Spade Terminals

This accessory package includes everything you need to install one subwoofer into an enclosure, and wire to connect the enclosure to your amplifier. This package is a top of the line accessory package which we put together and tested.

The drywall wood screws were hand selected by our installation experts because they drill into the enclosure very cleanly, without chipping the enclosure. The speaker wire is 14 gauge. This is way better than using 16 gauge. You can be 100 % sure that your enclosure will have a clean signal to the amplifier with this top of the line speaker wire. These spade terminals have also been hand selected by our installation experts to make the internal wiring simple, secure, and to run the audio signal cleanly.

Product Specifications

# of subs Single
Ideal Sealed Minimum Box Volume cubic feet 1 cb ft - 3 cb ft
Ideal Vented/Ported Minimum Box Volume cubic feet 1.25 - 2.50 cu ft
Impedance Single 4ohm
Manufacturer ALPINE
MPN SWE-1243
Peak Power Handling Watts 501-750
RMS Power Handling Watts Up to 250
Sensitivity (dB) 81-90 dB
Size of Subs 12"
Sub Shape Design Circle
Subwoofer Size 12"
Top Mounting Depth 5-5/8"
Type of Enclosure Vented
UPC 793276620989
Warranty 1 YEAR
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