FBT SUBLINE 218 SA - Active Subwoofer 2x18

FBT SUBLINE 218 SA - Active Subwoofer 2x18"

Marsoni

M251S

$2660.00

Get it in 3 business days with 1 day shipping. Friday, May 29

FBT SUBLINE 218 SA - Active Subwoofer 2x18"The SUBLINE 218SA is a dual 18 active subwoofer designed for the most demanding large scale sound reinforcement applications. It features two 18 high excursion woofers with 3 voice coils, powered by a massive 1200W RMS Class D amplifier, delivering extreme bass power with clarity and definition. Constructed from heavy duty birch plywood with a scratch resistant finish, the SUBline 218SA includes reinforced handles, an M20 top mount, and rugged

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💧 Water-Filled Design The ability to fill it with water makes it lightweight to move around when empty but very stable and heavy once filled. It holds the umbrella securely without tipping, even on windy days. ⚙️ Build & Compatibility The stand feels sturdy, made from durable plastic, and the black color is neutral and fits well with most outdoor decor. It fits standard umbrella poles nicely, and the tightening mechanism is easy to use and keeps the pole firmly in place. 🚚 Portability & Setup It was easy to set up — just fill with water (or sand if you want extra weight) and insert the umbrella. I like that it’s less heavy than concrete bases but still very effective. ✅ Pros: Lightweight when empty, easy to move Very stable when filled with water Simple to use and adjust Durable plastic design Fits most standard umbrella poles ❌ Cons: Needs regular refilling if you use water (can leak slowly) Plastic may show scratches over time

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Reviewed in the United States on October 6, 2025