Jump Equipment

Ok now I know most dont have a problem with this, but my issue is speakers, right now I use skull candy Lowriders for my jump, and they fall off very easily, and now that im practising more, they tend to fall off a lot more often. Now I have been told to by the logitek set with a HUGE bass and 2 speakers, but really, I want something thats semi easy to carry about, something that doesnt require a power jack and is loud with both treble and bass. I tried searching up Ghettoblasters (the speakers the Patrick jumpen uses) but found no such luck...even so...I need to be able to buy it around here. I plan on going to the Futureshop, the source and all those stores very soon but I need to know before-hand if there in stock. Can anyone help?

-Alter Ti/Sigi