“First of all, I'd like to mention overall view of this headphones, it's really stylish. I've listened to them with Fiio E6. Without burn-in, their sound IMO is extremely owerbrighten, but after 20-25 hours it's become more straight and normal. I think this headphones sounds good for vocals, instrumentals and classical music, due to nice airy highs and mids. On some rock songs they're...” --cleg
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...