ER-4 MicroPro series earphones were the first noise-isolating, high-fidelity in-ear earphones. After 20 years, these reference-quality earphones continue to be the choice of sound engineers, audiophiles, and musicians--and now, with the ER-4PT, you can take this audiophile experience with you anywhere.
Designed around the acoustic properties of the human ear
Etymotic's ER-4PT earphones are ideal for long-distance travelers who want amazing sound quality from their MicroPro earphones. Each pair of ER-4PT earphones comes with an assortment of mobile adapters that includes one for airline audio systems. Featuring precision-matched and custom-tuned balanced-armature drivers, the ER-4PT delivers the most accurate sound reproduction possible in the earphone market.
The Best Noise Isolation Available in an Earphone
Based on Etymotic's ACCU-Technology™ platform, ER-4PT earphones have unsurpassed frequency response accuracy. In addition to a braided cable to reduce annoying microphonic effects, the ER-4PTs have the highest noise isolation of any earphones in any category: 35-42dB, or 98% ambient noise reduction. This reduction of outside noise diminishes the risk of listening at unsafe levels, leaving you to listen comfortably in a world of pure music.
Drivers Hand Selected and Matched for Accuracy
For Earphones to have 100% accuracy, a recording of a live performance must produce exactly the same sound at the eardrum as the original performance. Achieving this requires designing an earphone around the shape and acoustic properties of the actual human ear, such as the ear's natural resonance and horn effects.
Included adapters offer a true audiophile experience at-home or on-the-go
Each driver in the ER-4PT is identified by serial number and each earphone is documented by an individual frequency response curve. Each pair or ER-4PT earphones is accompanied by a signed channel-matching compliance graph to confirm that the earphones produce the same high-frequency boost that is characteristic of sound heard at the eardrum in the typical ear, ensuring that you receive the most accurate response possible from an in-ear earphone.
Stereo and Airline Adapters Included
ER-4PT earphones and the included adapters are designed to deliver a true audiophile experience for all home and professional audio equipment, portable players, laptops and netbooks, whether at home or on the go. A 1/4" adapter provides flexibility for use with traditional home stereo or recording equipment using a 1/4" headphone jack. The ER-4PT also comes with an included airline adapter for plugging into audio sources on airplanes. Enjoy music or the in-flight movie with the same rich sound and superior noise isolation you enjoy at home.
CUSTOM-FIT Option Available
For the ultimate in personal comfort, a CUSTOM-FIT upgrade option is available. This upgrade option provides personalized molds that are a perfect match to your left and right ears, offering all-day wearing comfort and high noise isolation.
What's in the Box
ER-4PT earphones, 1/4" stereo adapter, airline adapter, 6 pairs of ACCU-Fit eartips, shirt clip, replaceable wax filters, filter removal tool, channel-matching compliance graph, travel pouch, and storage case.
- Frequency Response: 50Hz - 10kHz (2dB), 20Hz - 16kHz (4dB)
- Transducers: ACCU-Driver balanced armature
- Noise Isolation: 35-42dB
- Impedance(@1kHz): 27 Ohms nominal
- Sensitivity(@1kHz): 108dB SPL (0.2V input)
- Maximum Output: 122dB
- Cable Length: 5 ft