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Etymotic Research Inc ER-4PT
microPro Earphones with Balanced Armature Drivers


Etymtoci Research's ER-4PT is intended for sound engineers and audiophiles in constant motion.
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Our Price: $299.00

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Etymotic Research Inc ER-4PT
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Etymtoci Research's ER-4PT is intended for sound engineers and audiophiles in constant motion. The ER-4PT combines the acoustic characteristics and features of ER-4P earphones and comes with extra mobile adapters and accessories for traveling professionals. Also included is an industry-exclusive channel-matching compliance graph, signed by the Etymotic engineer who precision matched and custom tuned the balanced-armature drivers.

World leader in sound reproduction

  • Unsurpassed frequency response accuracy and sound quality — 86%+ responseaccuracy from 20 Hz – 16 kHz
  • The only earphones with Accu•Driver™ balanced-armature, precision-matched,custom-tuned drivers
  • Highest output sensitivity in its class

Timeless style and fit

  • Professional quality and reliability
  • An assortment of noise-isolating ACCU•Fit™ eartip options to ensure properseal and comfort

Highest noise isolation

  • First earphones to completely seal the ear
  • 98% (35 dB - 42 dB) noise isolation —highest of any earphones or headsetson the market today
  • Reduction of outside noise reduces the risk of listening at unsafelevels    

Best durabilityBraid-reinforced cable for extremely low microphonic effect

  • ACCU•Filter™ user-replaceable filters protect the balanced-amature driversfrom ear wax

Technical Specifications:

  • Frequency Response :20 Hz - 16 kHz
  • Accuracy Score : 4B (92%) 4S (92%) 4P (86%) 4PT (86%)
  • Transducers :balanced armature
  • Noise Isolation : 35-42 dB
  • Impedance (@1 kHz) : 4B (100 Ohms) 4S (100 Ohms) 4P (27 Ohms) 4PT (27Ohms)
  • Sensitivity (@1 kHz) SPL at 0.1V  : 4B (90 dB) 4S (90 dB) 4P (102 dB)4PT (102 dB)
  • Maximum Output (SPL) : 122 dB
  • Cable : 5 ft

CUSTOM-FIT Option  Available
Etymotic offers a cost-effective CUSTOM-FIT solution to make your favorite earphones the best they can be with superb comfort, secure fit and consistent noise isolation.

Note: Please call Full Compass for more information on this option.   It requires a brief registration process, and a visit with an authorized audiologist to have ear impressions made.  The approximate cost of this option is $100 (excludes shipping, handling, and taxes).

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