Outdoor Speaker Systems
You might think you can save some money by buying regular speakers and installing them outside. Do not try this, outdoor speakers are specifically made to withstand outdoor conditions and temperature changes.
Manufacturers make all kinds of outdoor speakers. You can find black-box speakers, speakers shaped like rocks, or speakers that get buried in the ground. You can find a speaker to match any kind of yard.
You probably won't be happy if you have to deal with installation issues and connection problems. So if you don't know enough about speakers and wiring, consider having an A/V integrator help install the system.
Try and be considerate of your neighbors when installing outdoor speakers. If you can install the speakers so that you can hear them but your neighbors can't, then you are all set.