Review on 🎧 KZ-AS12 12BA HiFi Stereo Noise Isolating IEM Earphones/Earbuds/Headphones with Detachable Cable - Cyan, Wired Sports 0.75mm 2PIN (with MIC) by Doug Virden

The secret to getting the full range into your ears is to seal the earbuds well. I've found that a small amount of lotion on the ear tips eases insertion and creates a seal that creates gentle suction in the ear canal. Once successfully done, these IEMs will really open up the music in your head. Voice and instruments are lively and precise. Hands off, if you listen to heavy rock with low frequencies, you should rather look at devices that change the sound, such as Bose and Beats.