“ I bought these from an Ebay seller for 6.98 USD after reading good reviews online, and on the Head-Fi forums, but found no official review, so I'll add my thoughts. I was looking for an above average set of in-ear phones that offered good value for under 20 USD. They met my needs and I would buy them again for the same price, however, they only lasted 3 months of normal gentle...” --CEddy10165
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...