Blackline S18+ Compact vented sub-bass system The compact Blackline S18+ sub-bass system has been designed to be used with Blackline F12+ and F15+ full-range systems to extend and increase the total low frequency output power. The S18+ provides good bass punch with extended sub-bass output from a new, long-excursion, 18” (460mm)/4” (100mm) voice coil driver with a water resistant cone and triple roll surround. The S18+ is provided with a top ha FEATURES - Compact vented sub-bass
- Direct radiating 18” (460mm) driver
- High temperature 4” (100mm) voice coil
- Large ports ensure low air noise
- Top hat fitting for pole mounting F12+/F15+
- Five year limited warranty
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