The U4 universal-fit earphones were designed with bass lovers in mind. In addition to having dedicated mid and high drivers, their proprietary dual low subwoofers produce powerful yet controlled bass. Previously, this sound could only be possible with large, bulky over-the-ear headphones, but due to their advanced design, the U4s deliver the richness and low-end impact with ease. This product is ideal for drummers, percussionists, bass players and the like.
The U4 also features our innovative apex® technology. Apex (air pressure exchange) is an enhanced version from the previous technology that relieves air pressure caused by miniature speakers in a sealed ear canal. Apex gives you a superior listening experience that simply cannot be achieved by traditional IEM’s.
Like all 64 Audio universal-fit products, the U4 earphones are inherently noise-isolating and are designed to work well with a wide range of personal audio devices as well as all personal monitoring systems.