Giro's TuneUps Audio Drop technology is applied to every component of our audio program. So now every Audio Series helmet and TuneUps after market kit features 40mm speakers that produce crystal clear treble and deep thumping bass. In addition to a step up in audio output, the system is easier than ever to use. Super thin speakers drop into our newly designed giro earpads that come with your helmet* so you’ll never lose the integrated design of your earpads and your helmet. *Some Giro kids and alpine helmets are not audio compatible.