Ti In-Ear Headphones Performance Build Quality Comfort Value Be In-Ear Headphones Performance Build Quality Comfort Value Mg In-Ear Headphone Performance Build Quality Comfort Value PRICE $99, $199, $299 AT A GLANCE Plus Clear sound, great bass Five-year warranty Now made in the U.S. Minus Tangle-prone cable No phone controls THE VERDICT Periodic Audio’s three in-ear headphones—the Mg, Ti, and Be—may only differ in the driver material but sound more different than you might expect. Periodic Audio is a brand-new company that launched with just three in-ear headphones, the Mg (Magnesium), the Ti (Titanium), and the Be (Beryllium), for $99, $199, and $299, respectively. The three headphones look nearly the same, differing only in the color of the earpiece end caps. The Mg and Ti are similar shades of silver, while the Be is gold. The three models’ 10mm drivers are all mechanically exactly the same but differ in their diaphragm materials—magnesium, titanium, and beryllium—so it made sense to look at all three models as a group.