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Alpine® 12" Type S Subwoofer-SWS-12D4

Model #: SWS-12D4
87347
Alpine
At a Glance

Alpine® 12" Type S Subwoofer with 4 ohms and 4 unique alpine technologies

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Get to know this product.

Master of All Trades, Jack of None.

  • Taking a clean-slate approach in the development allowed Alpine engineers to design the subwoofer to excel in nearly every category. Whether in a small sealed or vented enclosure, these new subs possess the ability to be articulate and defined or powerful and authoritative. Deeper and more refined looking than their predecessors, they now sit at 5.6” (SWS-10D4 & SWS-10D2) and 5.9” (SWS-12D4 & SWS-12D2) deep, making them flexible for many different installation options.

More Excursion = More Output

  • The new FEA-Optimized Motor Structure together with our revolutionary HAMR Suspension Design gives the new Type-S Subwoofers the highest X-max and SPL output in the category.
  • With a real-world, measured 15mm of one-way X-max, the new Type-S Subwoofers deliver best-in-class output, ultra-low distortion, and unparalleled sound quality. Borrowing the HAMR suspension from the Type-R, these new Type-S subwoofers have over 30mm of one-way stroke, for a total of nearly 3” of peak-to-peak excursion!

Underhung Design = More Control

  • The new dual-sided CRC motor structure mimics that of the Type-R Thin subwoofers, providing these subs with an ultra-linear, highly controlled sound. This patented design (US Patent # 6,639,993) creates a perfectly symmetrical and linear magnetic field for the coil to travel in, minimizing distortion while enhancing sound quality. The high-grade double-stacked magnets ensure adequate clearance for high excursion while providing the energy needed to power these beasts.

Keep it Cool = Keep it Playing

  • Alpine’s Patented Airflow Management System (US Patent #7,684,585) helps minimize power compression and ensures reliable long playing time by actively wicking output-robbing heat away from the Voice Coil.
  • The massive 65mm (2.6”) diameter voice coil provides nearly double the surface area when compared to the previous 38mm (1.5”) voice coil. Similar to having a larger intercooler in a race car, the larger surface area allows for the voice coil to cool faster, ensuring that your bass tracks cleanly and reliably, without compression.

Massive Voice Coils = Maximum Durability

  • The new 6-layer (Dual 4) and 5-Layer (Dual 2) coils are wound on a spiral-cut aluminum former. The massive coil, along with the black anodized coating, provides these woofers the thermal mass and cooling capacity to achieve a full 500W of RMS power handling. Peak power… try 1500W.

Four Unique Alpine Patents

  • 4 unique patents for the Type-S subs make them a superior subwoofer in the category.
  • FEA Optimized H.A.M.R Surround – The High Amplitude Multi-Roll Surround Design allows for extreme excursion without sacrificing valuable cone area. FEA Optimized for linearity and made with injection-molded Santoprene ® , the H.A.M.R. surround is a key part of the suspension system that allows for extreme excursion with accurate, distortion-free control.
  • FEA Optimized Dual-Sided CRC Motor Structure – Creates a symmetrical magnetic field while optimizing flux density to greatly reduce distortion, and further improving power handling and output.
  • Perimeter Venting with Airflow Management System – Forced air cooling during operation constantly cycles fresh-air through the gap to keep voice coil temperatures cool.
  • FEA Optimized Spider w/reinforced Layer Spider Integration – Ensures reliable and consistent control of the tinsel-leads to eliminate any possible mechanical noises or interference typical of many high-excursion designs.

High Strength Steel Frame

  • With such an advanced airflow system we have incorporated a high strength steel frame to keep the bass going while keeping your sub cooler.

8 AWG Push Terminals

  • Keeping power consistent to your woofers is just as important as keeping them cool. The 8 AWG Push Terminals are used on the Type-S woofers to keep power current flowing, allowing your subwoofer to get the power needed from the amplifier to run cool and consistent.

More Bass In Less Space

  • What is unique and amazing about the new Type-S subwoofer is not only the entirely new engineering behind the build, it's the requirements for them to optimally perform. The new Type-S specification requires 0.5-0.85 for the 10”, 0.65 – 1.0 for the 12”, and 1.25-2.0 for the 15” cubic feet air space for superior performance.

High-Grade Strontium Ferrite Magnets

  • Creates a symmetrical magnetic field with evenly distributed flux density to greatly reduce distortion, while further improving power handling and output.

Clean, Concealed Mount Gasket System

  • These subwoofers have a shallower mounting depth allowing for more application flexibility and the concealed mount gaskets give Type-S subs a clean finished appearance for any vehicle.
Useful Documents
Specifications

Construction

Enclosure Type:Sealed

Specifications

Sensitivity:86.5 dB

Styling

Color:Black

Misc. Specs

Depth (in.)6.81
Width (in.)12.63
Height (in.)12.63
Woofer Size12"
Mount Depth5.875
Peak Power Rating (Watts)1500
Subwoofer Size12"
Rms Power Handling500
Manufacturer Warranty1 Year
Shallow MountNo
WarningProposition 65 Warning for California Residents