Etymotic ER4XR Review - Best Under $300?

Etymotic Research ER4XR Review – Best Audio Quality Under $300?

What makes these in-ear monitors so special? Are they extremely lightweight and durable, or do they produce the best audio quality possible for under $300? This company has specialized in audiology since they founded in 1983. They have spent years and years dedicated to the rigorous testing required to perfect each earphone they produce. Does…