RevoNext QT5 review: This in-ear monitor offers tremendous bang for very...

Many smartphones come with earbuds that let you privately listen to music stored or streamed on the device. Many consumers regard those stock earbuds with disdain, however, claiming their sound quality is simply not good. For them, buying a set of third-party earbuds—or, even better, a set of in-ear monitors (IEMs)—is an easy way to improve the quality of the sound they hear.