“ I rarely write reviews but after spending so much time trying to find good in-ear headphones I think my search has finally ended. I'm very impressed with the clarity of the sound through the entire sound range. The bass is also very impressive; something about it just feels right. They also feel very comfortable as well; most in-ear buds tend to make my ear canals uncomfortable after 30...” --hahaxixi
The 4.Ai, a hand crafted In Ear Monitor (IEM) utilizing the same internal design and components in the 4.A Custom In Ear Monitors (CIEM). The 4.Ai requires the same painstaking hand craftsmanship that all Heir Audio CIEMs require. The 4.Ai offers all the advantages of an IEM, built with the same exacting standards of all Heir Audio products. The 4.Ai, like its cousin the 4.A, offers a clean...