How long does it take to manufacture UE Pro Custom In-Ear Monitors? Follow Our normal turn around time is 7-10 business days from the time we receive your impressions and order. Related articles Fitkit vs. Audiologist Impressions Can I really use in-ear monitors to mix or produce projects outside of my studio? What is IPX technology? Can I visit Ultimate Ears? What if I experience intermittent or lack of sound?