Out door sound systems?

[evildane]

outside for parties and mainly while hitting my dry slope with friends. I have little to know knowledge of sound systems, can anyone help me by pointing me in the direction of a portable sound system that is weather proof and great sound quality, especially bass. I do not want a 8 speaker system that i have to set up every time i want to ski though. Help please!!!

 

[Sklar]

how are you looking to power them?

 

[evildane]

I have outlets on my dry slope for power if thats needed, power isnt a big issue. but if there is a portable system with its own supply of power just as good as one without a power supply then id prefer that.