Adorama offers the Fender FXA5 Pro In-Ear Monitor in Metallic Black or Silver for $129 with free shipping. That's the lowest price we could find by $101 and the best price we've seen. It features a frequency response of 19Hz to 21kHz, dual balanced armature array, 120dB at 1mW sensitivity for distortion-free audio, carrying case, adapter, cleaning tool, and cable.uned balanced armature array, tweeter designed to match a custom 9.25mm precision rare-earth driver and groove-tuned port, carrying case, adapter, cleaning tool, and cable.