Can horn players use UE PRO IEMs? Follow YES! In-ears are for everyone who wants to perform better. For horn players, we suggest adding the ambient ports in order to reduce pressure. Learn more here. Related articles What makes the UE 18+ PRO unique? Fitkit vs. Audiologist Impressions Are more drivers better? I need a refit. Can a local audiologist make the adjustments? Would that affect my warranty? How does Ultimate Ears Pro ship?