In this instructable i would hopefully so you how you can create your own speaker backpack like the one pctured.

Step 1: TOOLS, EQUIPMENT, ETC...

the items you will be needing to complete this task are:
TOOLS: sissors
               screwdriver
               tape (if necessary for taping the speaker contacts)
               marker
ITEMS: an old backpack (that you dont mind cutting up)
              a old binder for support
              a pair of speaker (the size is up to you)
              speaker wire
              a speaker plate or mount to hold your speaker in place
              mini jack cable
              mini amplifier
              rechargeable battery of 12v (do not exceede 15v)

Step 2: Chossing Speaker Size and Cutting Hole for Speaker

first thing is to decide on the size of the speaker by check how much room you have where you are going to mount the speakers. i decide to go as big as i can with the speakers on the side of the backpack. i chose 5X7 pioneer speakers that i found at a junkyard inside a ford bronco and i cut out the speaker mounts aswell.

once you choosen the speaker size and have the mount ready its time to mark and cut the holes where the speaker will be positioned and mounted.

Step 3: Mounting the Speaker and Attaching the Wires

next thing is to attach the speaker wire to the speakers and mount them on the backpack.

you can add a piece of tape to the wire connectors on the speaker for added protection and to keep it in place.

mount the speakers and run the speaker cable to where your amp is going to be. i ran my wire to the front pocket because that is where i have decided to mount my amp.

insert a binder if you want support to keep your speaker facing out.