RedactedNarrative: Operator was heading west on Lake Wazeecha at approximately 35-40 mph intending to beach his boat on the sand shoreline west of the boat landing.  As operator approached the boat landing area, he turned left and crossed some waves.  As the boat impacted the waves, a speaker sitting unsecured on the console, fell between the steering wheel and throttle.  Operator stated he was unable to control the steering or throttle and the boat crashed into the shoreline and trees. Injuries were caused by impact within the vessel.