mjflcgs

The Zumo 450 audio output is overcome by wind noise at freeway speeds. Am currently using earbuds from the zumo to my helmet. Would like to find some sort of mini amp I could install under the bike seat and electrically connect between the Zumo and an earphone. The amp should be 12VDC and have some sort of control that I can operate while riding. Maybe there is some sort of earphone that already satisfys the requirement. Any ideas? Thanks, Mike