Inside each Ultimate Ears 4 Pro Custom In-Ear Monitor you’ll find our proprietary dual-armature speaker system.
In addition, an integrated passive crossover circuit directs the low-end frequencies to a dedicated speaker for bass and mids, and the high frequencies to a speaker dedicated for treble. The result is reference-quality, evenly balanced frequency response.
And since you probably don’t have roadies yet. Custom In-Ear Monitors are designed to withstand a little wear and tear. Like our other custom monitors, they’re compatible with wireless transmission systems and portable media devices.
Ultimate Ears 4 Pro Custom In-Ear Monitors provide -26dB of isolation and passive noise cancellation.