Hello, I built a custom sub woofer and speakers, i soldered the audio connection to the sub woofer to give it power since it broke and it was a quick easy fix. I want to create a USB port on the sub woofer. im willing to drill holes into it since the sub woofer has no electronics inside besides the actual speaker. Here's pictures of my rig:
http://imgur.com/a/anAeG
http://imgur.com/a/0YAqf
http://imgur.com/a/37Kkd
http://imgur.com/a/anAeG
http://imgur.com/a/0YAqf
http://imgur.com/a/37Kkd