
B&C design
S218BP
2x18" 6800w 6th Order Band Pass Subwoofer
- Drivers
- 2 × 18DS115, 8 Ω
- Output
- 139 dB peak, CEA-2010B
- Power
- 6,800 W
Enclosure designs
Cabinets for the 18DS115: two designs and a suggested box from B&C, plans builders have published, and flatpack kits of the S218BP.
From the maker, with plans to download

B&C design
2x18" 6800w 6th Order Band Pass Subwoofer

B&C design
Extended LF Reflex Isobaric Subwoofer
From B&C’s 18DS115 page
B&C gives the volume and tuning only; the port is yours to size.
Links to published plans that name this driver
HOQS’s own simulation uses the 18DS115-4
The designer calls it “a step up”, needing 2,000–3,000 W per driver
Specs, prices and shops for each version
Each design links to where its maker or designer publishes it. Bits hasn’t built or measured them. How we find designs. Know another design for the 18DS115? Tell us.