Built for Open-Air Listening The rugged PSM speaker system provides high power handling and volume for ultra-clear music reproduction, even through helmets. Motor noise and high-speed winds don’t stand a chance. Tough for Any Climate Utilizing heavy-duty ceramic magnets, water-proof suspension and a polymer basket, these lightweight speakers still won’t affect your ride or a bike’s weight distribution and handling. Resistant & Efficient The PSM Mini Enclosed Speakers are built for excellent sound on your ATV or motorcycle handlebars, mounting using its single-point, cast-aluminum clamp. These weather-proof speakers come in durable chrome or glossy black enclosures, complete with handlebar mounting hardware. Add a PXA amplifier for a complete system, meant for rough roads and rougher trails. PSM Speakers work best with 15-50 watts of recommended power. See below for more details.