Outline STSUB-215 Ground-stackable/Flyable Subwoofer: 2 x 15” (WR)
Designed to unleash stadium-scale low end in any climate, the Outline STSUB-215 is the definitive low-frequency partner for the STADIA 100 LA line-array. Armed with twin 15” neodymium woofers, it projects authoritative bass down to 34 Hz while surviving torrents of rain, blazing heat or freezing nights thanks to Outline’s exclusive ‘outSIDE’ weatherproof technology.
Unbridled Power & Fidelity
Each woofer is backed by a 600 W AES rating and long linear excursion, delivering up to 144 dB peak SPL without sacrificing definition. Whether flown or ground-stacked, the STSUB-215 fills large venues with punchy, musical low frequencies that integrate seamlessly with your main PA.
Engineered for the Outdoors
The Baltic birch enclosure is encapsulated in a resilient elastoplastic coating that chemically bonds with the wood for unparalleled impact and moisture resistance. A powder-coated steel grille backed by an acoustically transparent waterproof membrane shields the transducers while maintaining sonic clarity. Rated IP55, this subwoofer laughs at dust, water jets and corrosive salt fog.
Flexible Deployment
Eight corrosion-resistant M10 points and a compact footprint let you fly, stack or integrate the cabinet into architectural spaces with ease. Recessed barrier-strip connectors accept weatherproof plates for permanent outdoor installations, ensuring years of trouble-free performance.
Key Features
- Dual 15” neodymium woofers deliver 34 Hz–150 Hz extension
- 144 dB peak SPL for concert-level impact
- IP55-rated ‘outSIDE’ coating and sealed grille for all-weather reliability
- Optimised to partner with Outline STADIA 100 LA arrays
- Flyable or ground-stackable via eight integrated M10 points
- Low weight (50 kg) and compact dimensions ease transport and rigging


