This is me documenting my quest to design the quietest soundproof box for portable generators. I did a lot of research and put some science into this design. For those of you who watched the video and are curious about how much it costs, weighs, and what parts I used, check out the list below.
Soundproof Box Stats
- Weight: 241 pounds
- Final cost: $368
- Sound Reduction: Up to 9 db (Almost 100 times quieter)
- Size: 4 feet long x 2 feet wide x 21 inches tall

Parts List for Soundproof Box
- 3/4 inch OSB 2’x8′(wood) = $65.96 (4@ $16.49)
- 5/8 in drywall 4’x8′ sheet = $14.28
- Mineral wool insulation, 15.25″ x 47″ x 3″ = $52.98
- 3″ caster wheels = $13.98 (2@ $6.99)
- Acoustic sealant = $15.98 (2@ $7.99)
- Rubber stall mat = $61.05
- Outlet box cover = $1.78
- 3′ extension cord = $4.99
- 3′ power supply cord = $3.45
- Bolts/ Hardware = $34.49
- Rubber undercoating = $12.87
- AC cooling fans = $64.40 (2@ $29.99)
Free Parts I Already Had
- Screws
- Paint
- Primer
- Aluminum panels
- Aluminum tape
- Furnace grill (x2)
More info to come soon..