this is how to make a bag with a mini pa amp and 2 book shelf speakers in a back pack

Step 1: Moding the Amp

if u dont have a amp that takes 12v or a battery powered amp then you will want to take the 240 volt step down out of the amp so it will run of 12v.

Step 2: The Battery Used

www.maplins.co.uki used a yuasa 12v battery u can get these from www.maplins.co.uk i would recomend this battery as it has lasted nealy 3days so far with no change in volume on the amp

this battery is Â£21 but i got mine out of the house alarm for free (Y)

Step 3: The Speakers

you can use book shelf speakers

i would recomend them as they have the wooden box and the sound is very good from them

i used some amstrad 30w speakers and tey work very well and go very loud

they do the job with amazing results

Step 4: The Audio Lead

u can use 2 types of leads for the input
1. a guitar lead with a plug in jack to convert it into a smaller conection for mp3 players

2. a phono aux lead for hifis with the small jack (headphone conection) on the other side

sorry i dont know what they are called lol