Let me save you the time and money I wasted...
Over the past 3 years, I've tried $250 helmet speakers, $180 AirPods, $40 Amazon earbuds with thousands of 5-star reviews, a couple different "sports" earbuds, cheap wired earbuds, and even those ultra-small earbuds everyone says are perfect under a helmet.
Six disappointments. One winner. Here's why: