- Ultra-high-output ground-stack subwoofer
- Hybrid® horn/reflex loading for maximum acoustic efficiency and extended low-frequency reproduction
- 18-inch (460 mm) long-excursion neodymium dual voice-coil driver with a 4.5-inch (115 mm) voice coil
- Operates in both forward- and backward-facing configurations
คุณสมบัติ SXH218
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