Cheap Speaker Backpack

This i made using old pc speakers, a broken guitar amp, an old backpack, and lots of hot glue. it is powered by a li ion drill battery. i did not take any photos during the build, so if you have any questions, please ask in the comments.

Edit
i ran to Radioshack and picked up a 12v switch. it makes turning this thing on convinent. Before, i had to plug the amp in.