EFFICIENCY IS 96DB SPL & HAS A VERY HIGH 9.0MM XMAX FOR CLEAN STRONG Sound Large 4" VOICE COIL, DOUBLE SPIDER, HIGH 25.7 BL FACTOR & A WIDE FREQUENCY RANGE FROM 60HZ TO 4.0KHZ WEIGHS only 11.44 LBS. THANKS TO ITS' LIGHTWEIGHT NEODYMIUM MAGNET
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