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 Do I need or want the passive ambient feature for my UE Pro Custom In-Ear Monitors? What is the ambient sound level reduction when using any type of UE Pro In-Ear Monitors? Are more drivers better? User Guide What is the sound suppression aspects for each model? What benefit do they offer?