Sound quality, a science: Since its foundation more than 70 years ago, JBL has acted like a magnet for all generations in the audiophile sector. For months, JBL acousticians, mechanical experts and software developers have modified and optimised all audio elements of the Cardo intercom systems. The result is the 45 mm speakers, which offer unprecedented sound quality in biker communication systems. The best fit: Achieving good audio quality inside a helmet is a challenge. The wind, the road, the engine and the type of helmet all influence the transmitted frequencies. Taking all these aspects into account, the 45 mm speakers offer a sound quality that only a large speaker can actually achieve, in a 42 mm narrow base that is compatible with most modern motorbike helmets. Enjoy revolutionised sound: thanks to a standard 3.5 mm connection, these speakers are compatible with virtually every device on the market, regardless of brand. If you own a device from the Cardo Freecom or Packtalk series, the JBL processor and special firmware offer even more quality. Don't own a Freecom or Packtalk? No problem: the powerful hardware still ensures greatly improved performance of your headset.