Concrete Passive Speaker Cube
In this video I'm building a passive concrete speaker for my phone to sound better.
Products used for the project (Affiliate):
Plastic wine glasses - http://amzn.to/2nAPAKm
Polyurethane glue - http://amzn.to/2nAZtHH
Dewaxed Shellac - http://amzn.to/2nw8wZ5