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 UE 18+ Pro 30-day Money Back Guarantee Returns Ultimate Ears Pro In-ear Monitors Are more drivers better? Do I need or want the passive ambient feature for my UE Pro Custom In-Ear Monitors? Can I cancel or receive a refund on my custom product order?