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Etymotic ER-4P MicroPro Earphones


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  • Model: ER4P
  • Shipping Weight: 0.41kg
  • 0 Units in Stock
  • Manufactured by: Etymotic Research Inc


The ER-4 MicroPro earphones are the next best thing to live music, with noise isolation far surpassing that of active noise-canceling earphones. The ER-4s require NO batteries, and can be plugged into any audio source. Their external noise exclusion - 35 dB with 3-flange eartips, 42 dB with foam eartips - allows you to hear the full dynamic range of recordings without having to play them at unnaturally high and unsafe levels. The earphones come in three styles: ER-4B, ER-4S, ER-4P.

The ER-4P (Portable) earphones can be used with portable CD, MP3, DVD and other players without requiring an additional amplifier. As compared to the ER-4S, the ER-4P has 10 dB greater output at high frequencies and 13 dB greater output at low frequencies. The higher sensitivity and enhanced bass of the ER-4P have made it the most popular earphone for most uses.

Next Best Thing to Live Music

  • Transparent, reference-quality sound
  • For audiophiles, performing musicians and recording engineers
  • For mixing, monitoring and critical listening
  • Accurate real-ear response
  • Unsurpassed isolation from outside sound

System Includes

ER-4 MicroPro earphones
5 ft. cord with 3.5 mm stereo phone plug
1/4" stereo phone adapter plug
4 triple-flange eartips (standard size)
2 triple-flange eartips (small)
4 foam eartips
4 glider eartips
Filter changing tool
4 replacement filters
Shirt clip
Storage box

ER-4P Technical Specifications

Response Accuracy (ER-4P): 86%
Noise Isolation: 35-42 dB
Frequency Response: 50-10 kHz ± 2 dB; 20-16 kHz ±4 dB
Acoustic Polarity: + electrical = + acoustic
Transducer Type: Balanced Armature 1 kHz Sensitivity (ER-4P): 108 dB SPL for a 0.2 V input (102 dB @ 0.1 V; 106 dB @ 1mW)
Impedance (ER-4P): 27 Ohms nominal
Maximum Output: 122 dB SPL
Maximum Continuous Input (ER-4P): .75 Vrms
Weight: Less Than 1 oz.

This product was added to our catalog on Thursday 01 January, 1970.

Manufacturer Info