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 Are more drivers better? How does Ultimate Ears Pro ship? What is the UE Sound Tap? Are the UE Pro Remastered Reference Monitors truly flat? Do I need any other equipment for my in-ear monitors?