Type-R subwoofers have been known for their power handling, clean output and deep bass excursion at a mid-line price. Using the highly successful Type-R subwoofers as a foundation, we applied various performance and hardware improvements to the design, essentially transforming them into the new R-Series subwoofers - The Next Evolution of Proven Performance. twin 12" alpine R's but you'll need a huge amp to power those bad boys.(1000w RMS) you can usually find 2 alpine R's on ebay for 200$ ish, DO NOT get a ported box, they tear up your subs, and shorten the life significantly, also they sound like crap :( Buy a sealed box, their cheaper and have a better sound I am trying to design a dual 12" enclosure for my 1243D Type R 12's. I have attached what I have come up with so far. According to Alpine the port volume and the internal net volume are almost exactly what they need to be. Everything will be 3/4" MDF except I added a 1" panel to the front just so I can recess the subs to make them flush. Shop for Alpine SWR-1242D 12" Type-R Series Subwoofer at Best Buy. Find low everyday prices and buy online for delivery or in-store pick-up Shop for alpine subwoofer at Best Buy. Find low everyday prices and buy online for delivery or in-store pick-up Best Buy Outlet. Clearance, open-box, refurbished and pre-owned. Alpine - Type-R Thin 10" Single-Voice-Coil 4-Ohm Subwoofer - Black. Model: SWR-T10. SKU: 4202777. Not Yet Alpine Subwoofers with Boxes. Alpine Powered Subwoofers. Alpine Empty Subwoofer Boxes. Alpine Sub Installation & Accessories. Alpine 12-inch. 1800W Max (600W RMS) 12" Type-R Series Shallow Mount Single 4 Ohm Car Subwoofer • Peak Power: 1800 Watts • RMS Power: 600 Watts • Aluminum Beginner Alpine Type R custom box build Building a 1.9 cubic foot ported box tuned to 27 hz built to exact specifications on Alpine's manual. CHEAP $100 Subwoofer TEST w/ 12 support.alpine-usa.com Today I start and finish a 12" ported box for an Alpine Type R (D4