Step 1: Requirements
a pair of computer speakers with input voltage of around 9 volts DC(check the output on the ac adapter)
Soldering station and solder
Needle and thread
NiCD or NiMH battery pack to match voltage of speakers
molex plug with input plug or plug set of your choice
3.5 mm headphone jack input
3.5 mm cable
hot glue and hot glue gun
knife or other cutting tool
bigger/better speakers to upgrade to ; )
Step 2: Taking It All Apart
once this is all done your going to either cut the power wire or unsolder the power input checking to make sure your know positive from negative.
hold onto that as you will turn it into a power supply for it when our battery is dead.
next your will either cut or unsolder the wire's going to the speakers so they can be placed correctly and have the cables extended. again make noe of positive and negative.
Step 3: Headphone Jack
Step 4: Your Backpack
i suggest you plan on putting the controls in the farthest back pockter to keep them well maintained.
now from where ever you are wiring to and from you will need to make holes along the stitching to run wire this is done with a knife or other sharp tool. After the holes are ready you will take your speakers that have been removed of all previous wires and your will solder new wires back to them and run the through the holes that had been made after the speaker wires have been ran stitch the holes back together to stop any fraying.
Step 5: Altoid Tin
once that is done you will cut your Altoids tin accordingly to the controls and jacks you've used, place them at your discretion. after it can sit safely in place you will attach electrical tape to the underside to stop it from shorting out on the tin. you can see from the pictures below hoe i have mine setup. once it is how you want it hot glue it in place.