Optimal placement of your speakers will give you the best sound quality. Choosing the right spot will also help prevent damage to the speaker and any possible interference with other marine electronic equipment on your boat. Avoid placing them under the seat if you have a full-range speaker. They should be placed as high as possible to maximize sound output and quality. If you have a larger boat, consider mounting them above your head. The closer they are to a wall-like surface, more bass they'll have. It is also important to avoid places that have too many objects. Most of the sound would be absorbed, and you won't have the listening experience you desire. If your speakers do not mount, place them in a secure spot, so they hit other objects or fall into the water.