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...
“ First off the disclaimer, the Realvoice IEM’S were given to me a month or two back for reviewing. I would like to thank Spider Cable for the review sample and my apologies for taking so long in writing this review. Since I have had these I have used them about 75% of the time when I am using earphones, which probably averages about two hours per day. So I have put quite a few hours...” --Carlsan