• B&C 18 DS 115 8 OHM• This upcoming Evolution subwoofer uses a new, longer, four-layer aluminum voice coil.• The result is more energy in space, less heat, higher sensitivity, increased power handling, lower distortion, and improved overall performance.• The 18DS115 features a 40mm long, 4.5-inch diameter (116mm) copper clad aluminum wire voice coil.• Rated at 1700 Watts AES, with a sensitivity of 98 dB, and over 14.0mm of Xvar, this high-energy subwoofer is a significant step up from similar models in the B&C range.