“So, first of all you might be wondering why even bother reviewing a headphone that nobody knows about, has ever heard of, and most likely will never own or see in real life? Simply put, I think that this headphone deserves it. There are many of the 70's Pioneer clones, so it's good to give people an idea about them if there is any interest. Pros: - Aesthetics and construction are...” --GREQ
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...