Pish Posh.

From Danley Sound Labs, the military asked them to build a sound projectile capable of over 100 dB at 15~20Hz from 250 meters away, what the military would use it for is a mystery but here's what they came up with...

Specification

-3dB @ 12 Hz and flat from 15-80 Hz. 105 dB @ 250 meters(~273 yards)

- x40 Subwoofers
- x40 1,000 Watt amplifiers
- 20?€™ x 8?€™ x 8?€™ Cargo container
- 53 Sheets 4'x8' 18mm 13 ply Baltic Birch plywood
- 645 feet of 3" x 3" 1/4" angle iron
- 23 feet of 4" x 4" square steel tubing
- 39 feet of 1" x 1" X 1/4" angle iron
- 23 lbs of .030 welding wire
- 95 Tubes of heavy duty construction adhesive
- 1100 feet of 12 Gauge speaker cable
- Approx. 5000 screws and bolts

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matterhorn