Ultimate Ears UE-5c

The UE5C is a passive two-way design. It has two drivers and a passive crossover in each earpiece. One driver reproduces the low frequency, and another driver reproduces the high frequency. Frequency response is from 20hz to 16kz. Earpiece also offers -26db of isolation from loud noise. Input sensitivity is 118db @1mw. Drivers are a balanced armature design