Outline SUB218 High Power Ground-Stackable Subwoofer – 2 x 18″
Engineered for venues that demand visceral low-frequency energy, the Outline SUB218 combines dual long-excursion 18″ drivers with proprietary Energy Retentive Porting to unleash seismic bass down to 28 Hz while delivering a chest-punching 148.5 dB peak SPL. Whether reinforcing a dance club, live stage or sports arena, this ground-stackable powerhouse turns amplifier watts into pure acoustic authority.
Earth-Shaking Low End
Two precision-matched 18″ woofers operate in direct radiation mode, moving massive air volumes with minimal distortion. The result is authoritative sub-bass that effortlessly tracks both electronic kicks and acoustic drums, preserving the dynamic nuances that keep audiences engaged.
Energy Retentive Porting Advantage
Outline’s exclusive E.R.P. design optimises airflow inside the enclosure, reducing turbulence and port compression. More of your amplifier’s output becomes usable sound energy, delivering tighter transients, extended response and higher overall efficiency compared with conventional subwoofers.
Road-Ready Construction
Crafted from premium Baltic birch plywood and protected by a hard-wearing black polyurea coating, the SUB218 is built for relentless touring and permanent installations alike. A powder-coated steel grille, recessed handles and 16 M8 mounting points ensure effortless integration with any Outline line-array or point-source system.
Key Features
- Dual 18″ long-excursion woofers with 148.5 dB peak SPL output
- E.R.P. porting for superior efficiency and impactful punch
- 28 Hz low-frequency extension for immersive club and live sound
- Durable Baltic birch cabinet with tour-grade polyurea finish
- Ground-stackable and installation-friendly with 16 M8 points