RCF HL 35-S Passive Flyable Subwoofer for HL 6 - 15"The HL 35 S is the ideal flyable bass complement for the HL 6 line array system. It features a Baltic birch plywood cabinet housing one 4. 0 voice coil and a 15 neodymium woofer that handles frequencies from 40 Hz to 140 Hz, with maximum linearity and low distortion up to 134 dB. The hardware is designed for fast deployment and is completely compatible with HL 6 rigging. The heavy duty front grille is powder coated with a special transparent to sound