Pair of Prime R2 Series 12" subwoofer with dual 4-ohm voice coils in a dual sealed enclosure
Rockford Fosgate Pair of R2D2-12 Prime R2 Series 12" subwoofer with dual 2-ohm voice coils loaded in a dual sealed enclosure
One pair Rockford Fosgate R2D2-12 preloaded into the sub enclosure
Prime R2 Series 12" subwoofer with dual 2-ohm voice coils
Product Highlights: (each)
- 12" subwoofer with dual 2-ohm voice coils
- mica-injected polypropylene woofer cone with poly-foam surround
- stamped solid-steel frame
- power range: 50-250 watts RMS (500 watts peak power)
- frequency response: 43-250
- sensitivity: 89 dB
- top-mount depth: 5-1/8"
- sealed box volume: 1.02 cubic feet
- ported box volume: 1.79 cubic feet
- grille not included
Sealed Box: Rockford recommends a sealed enclosure with an optimum internal volume of 1.02 cubic feet (from 0.75 to 1.25 cubic feet is acceptable). Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable to all types of music.
Ported Box: Rockford recommends a ported enclosure with an internal volume of 1.79 cubic feet using one 4" diameter x 9.3" long port; this yields a tuning frequency of 45 Hz. Ported (or vented) enclosures typically provide better overall efficiency than sealed so they are suitable for use with smaller amplifiers, giving you more bass output from less power. However, this efficiency comes at the expense of very low frequency output (below 40Hz).