Subwoofer Alpine SWRD. General specifications: diameter 12 inches, maximum power W. Thiele-Small parameters: frequency of self resonance. Find great deals for Alpine SWRD 1-Way x cm Woofer. Shop with confidence on eBay!. Find great deals for Alpine Type R Swrd 12″ Dual 4 Ohm Subwoofer. Shop with confidence on eBay!.

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Alpine has taken the best features from its previous SWR Series subs and added the hottest technology for ground-pounding power and superb accuracy. The pulp cone has been reinforced with Kevlar the material used in bulletproof vests for extra rigidity, so it won’t buckle under hard play.

A rubber surround helps to maximize cone travel for deep bass, alpihe withstanding the decay that can destroy a speaker.

A redesigned thermal management system and aluminum airflow motor cover shed heat quickly for efficient operation and better power handling. The 2″ dual 4-ohm voice coils are wwr-1242d enough to handle lots of power while offering system wiring flexibility.

The tinsel leads are virtually unbreakable – they’re woven into the dual progressive Nomex spiders. An aluminum diecast frame swr-11242d a secure, non-resonant housing.

The SWRD is designed for use in sealed or ported enclosures. Submit a Review Report Error Share. Distributor for this product?

Contact us to claim this product listing. Kevlar Reinforced Pulp Spider Material: Through the use of highly advanced materials and patented and some patent pending design features, these subwoofers boast exceptional power handling, superb sound quality and long life.


High Amplitude Multi Roll Surround patent pending Most designs sacrifice cone area for a wide surround, or sound quality for alpind tall surround. Our High-Amplitude Multi Roll surround avoids this compromise AND achieves superb linearity, giving the best of both worlds – increased cone area for greater SPL and further linear excursion for optimum sound quality.

Kevlar Reinforced Pulp Cone Reinforcing the pulp cone with Kevlar provides an ultra lightweight parabolic cone that maintains its shape even during vigorous movement. Since the cone is significantly stronger with faster response, the result is highly detailed, accurate sound reproduction and body-shaking bass. Encapsulated Push Terminals With all wires conveniently located on one side, the Type-R subwoofers can be installed quickly, easily and neatly.

Jumpers are configurable for either parallel or series, and the push terminals allow for heavy gauge speaker wire. Swr-1242e Management Technology Cooling is a crucial element in subwoofer design. Since overheating in the voice coil can severely damage the woofer cone, Type-R subs use a variety of sohpisticated techniques to ensure that airflow is effectively controlled – pulling in fresh, cool air and maintaining maximum contact with all thermally conductive parts for optimum heat dissipation.

HAMR Engineered Airflow Cooling System This meticulously designed system uses various techniques and technologies, many patent pending, to force air across hot components for maximum cooling effectiveness. The diagram above shows how airflow management pushes hot air out and cooler air in.


HAMR Engineered Thermal Management Along with its sophisticated cooling techniques, the Type-R subwoofers use special materials to minimise heat, such as a high temperature-resistant four-layer brass voice coil winding and a high-strength BSP bobbin.

The diagram above shows where heat is transferred for cooler operation.

Alpine Type-R SWR-1242D – subwoofer driver

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