super backpack

[Cagedconnerman]

so, i'm thinking of making a super backpack, with a lot of electronics, most of the stuff i want to put in is low voltage and easy to work with, but i also want to put in some speakers, standard little 2.0's that plug into a wall, but thats the problem, they plug into a wall, i was wondering if anyone who knows of a solution to get maybe 10 or so 9v batteries to run 220v for a while could help me with maybe a wiring diagram or description it'd be VERY helpful. i know my battery life will be utter crap but thats no issue. any help with this is greatly appreciated.

- Conner

[xmastree]

You don't want to walk around with an inverter on your back...

Open up the speakers, you'll find a small transformer which takes the 220V down to (probably) 12V. Remove the transformer (saves weight too) and connect your DC supply directly to the amp.

[Redundant]

Aero has some ideas on a tech backpack. (http://www.thebestcasescenario.com/forum/showthread.php?t=6587) Actually, he wanted to make a whole backpack from scratch. He seems to have forgotten about the thread though.

[Nagoshi]

Find some speakers that work with batteries, I know a guy at school was listening to his music while smoking, and we could hear it from a good range.

[switz]

They have backpacks with built in speakers, I have seen them before

they have cheaper ones, but
http://cgi.ebay.com/SPEAKER-BAG-RUCKSACK-BACKPACK-WITH-BUILT-IN-SPEAKERS_W0QQitemZ320091546862QQcategoryZ16081QQrd Z1QQssPageNameZWD2VQQcmdZViewItem