The science of soundCardo delivers a whole new 45 mm set of the best sound ever in a motorcycle communication system. Achieving good audio quality inside a motorcycle helmet is demanding. The wind, the road, the engine and the type of helmet, all affect the frequencies you hear. Thats where these 45 mm speakers come in. due to its large diameter driver, it is capable of providing that sound quality. Cardo aimed to create a truly universal set of speakers for everyone to enjoy their superior sound quality. With a narrow base at only 42 mm it will still fit in almost every modern helmet. And by using a standard 3.5mm jack, cardo ensures that the speakers will connect to practically any communicator on the market, no matter what brand. Owners of Cardo FREECOM and PACKTALK series will enjoy extra boost with new JBL sound processor and firmware. Not a FREECOM or PACKTALK owner? No worries: this powerful hardware will still drive your headset audio performance to new heights.