ER4

Next Best Thing to Live Music

* ER4 system includesTransparent, 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

The ER4 MicroPro earphones are the next best thing to live music, with noise isolation far surpassing that of active noise-canceling earphones. The ER4s 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: ER4B, ER4S, ER4P.

System Includes

* ER4 MicroPro earphones
* 5 ft. cord with 3.5 mm stereo phone plug
* 1/4" stereo phone adapter plug
* Six 3-flange eartips
* 10 foam eartips
* Filter changing tool
* 4 replacement filters
* Shirt clip
* Pouch (not shown)
* Storage box

ER4 Technical Specifications
Response Accuracy:
ER4S MicroPro Earphones: 92%
ER4P MicroPro Earphones: 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 (ER4B/ERS): 108 dB SPL for a 0.79 V input
(90 dB @ 0.1 V; 100 dB @ 1mW)
1 kHz sensitivity (ER4P): 108 dB SPL for a 0.2 V input
(102 dB @ 0.1 V; 106 dB @ 1mW)
Impedance (ER4B/ER4S): 100 Ohms nominal
Impedance (ER4P): 27 Ohms nominal
Maximum output: 122 dB SPL
Maximum continuous input (ER4B/ER4S): 3.0 Vrms
Maximum continuous input (ER4P): .75 Vrms
Weight: less than 1 oz.