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

OUR PART #:  ER4PT

Part of their microPro® line, Etymotic Research's ER•4PT is intended for sound engineers and audiophiles who are in constant motion.
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Our Price: $299.00
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Etymotic Research Inc ER•4PT
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Part of their microPro® line, Etymotic Research's ER•4PT is intended for sound engineers and audiophiles who are in constant motion. It merges the acoustic characteristics and features of ER•4P earphones and comes with extra mobile adapters and accessories for traveling professionals. Every pair of ER•4PT earphones includes is an industry-exclusive channel-matching compliance graph that's signed by the Etymotic engineer who precision-matched and custom-tuned the balanced-armature drivers.

ER•4 MicroPro Series Earphones
Etymotic Research, inventors of noise-isolating, in-ear earphones, offers the ER•4 MicroPro series earphones. These use balanced armature receivers as found in their original insert earphone design, developed for auditory research and medical diagnostics. This series was the first commercialized earphone to use this technology, and is recognized as the world leader in response accuracy, to which all other earphones are compared. After more than 20 years, these reference-quality earphones are still the choice of serious sound engineers, audiophiles and musicians.

Accurate Earphone Reproduction
A live performance recording must reproduce exactly the same sound at the eardrum as the original performance, for earphones to have 100% accuracy. For this to be achieved, the acoustic properties of the ear must be factored in. The ear's acoustic resonance and horn effects change a flat audio signal entering the open ear into sound with a (2700 Hz) high-frequency boost - the same response heard at the eardrum in a typical ear.

World leader in sound reproduction

  • Unsurpassed frequency response accuracy and sound quality — 86%+ response accuracy from 20 Hz – 16 kHz
  • The only earphones with Accu•Driver™ balanced-armature, precision-matched, custom-tuned drivers
  • Highest output sensitivity in its class
  • Channel-Matching Compliance Graph supplied with each ER•4PT (example shown here):

Channel-Matching Compliance Graph supplied with each ER•4PT

Timeless style and fit

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

Highest noise isolation

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

Best durability

  • Braid-reinforced cable for extremely low microphonic effect
  • ACCU•Filter™ user-replaceable filters protect the balanced-amature drivers from ear wax

Etymotic Research ER•4PT Technical Specifications:

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

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).

Large Gray 3-Flange Replacement Eartips, 5 Pairs
Etymotic Research Inc ER38-18 Large Gray 3-Flange Replacement Eartips, 5 Pairs
Produced by Etymotic Research, the ER38-18 is a package of 10 (5 pairs) Gray Large 3-Flange Replacement Eartips that are designed for use with the following Etymotic products: ER•4 hf3 hf2 Music•PRO MP-9•15 HD•15 GSP•1 ...
12.75 14.00 9

Usually ships in 7-14 business days.
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5-Pairs of Standard Frost 3-Flange Eartips
Etymotic Research Inc ER38-15SM 5-Pairs of Standard Frost 3-Flange Eartips
Etymotic Research's ER38-15SM is a Package of 10 Eartips (5 pair) that are designed for use with the following systems:  ER•4 hf2 hf3 hf5 mc3 mc2 mc5 HD5 Safety ETY•Kids Music•PRO MP-9•15 HD•15 GSP•1 ...
12.75 14.00 9

Usually ships in 7-14 business days.
Need it sooner? Call us!

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