● SD218S is composed of two 18-inch high-power bass unit with 100mm voice coil, 220 magnet and inverted phase enclosure optimally designed by computer ● Bass unit is like “V” which is able to output high sound pressure ● No distortion under high power, powerful, extend with no delay in low frequency ● Made of high-density plywood, paint with wearproof, waterproof sand paint ● Applicable to occasions like peformance, conference and entertainment
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