Passive Phone Speaker Amplifier Made Out of a Tea Carton

This project takes an old tea carton (Or any other carton you can find that's the same shape and size) and turns it into a passive phone amplifier. A passive phone amplifier makes your phone speaker louder so you can share music with other people, and it's made out of recycled materials so it's good for the environment.

One large tea carton

Scissors

masking tape

Smartphone with a speaker

For this to work, you will have to cut three holes:

One long and narrow hole to fit your phone. Make sure it's just large enough to allow your phone to fit inside it, while being small enough so that it can hold your phone in place without it dropping inside the carton.

Then, you need to cut out two square holes in the sides of the box. These holes will allow the sound to come out. Make sure these holes aren't too large. I made my hole 4cm width, 4cm height.

My original plan was to paint it using spray paint, but I had none laying around so I decided to cover up all the edges of the box with masking tape to create this look. It doesn't look the best but it does the job. Feel free to go all out and make it look amazing!

What comes out is nice, functional, phone amplifier!