B&C 18DS115-4 18" Professional Neodymium Subwoofer 4 Ohm

.B&C designed the 18DS115 18" high output subwoofer to produce more output and lower distortion than any other comparably priced driver. With high excursion, incredible efficiency, and excellent power handling, this driver has true earth shaking output capability.
.Aluminum shorting ring helps control the voice coil for lower distortion
.4.5" four layer CCA voice coil allows high power handling and Bl
.Neodymium magnet allows a very high force factor without excess weight
.Double silicone spider keeps excursion linear even beyond rated Xmax
.98 dB efficiency to ensure high output even with modest amplification