Etymotic Research ER-4PT User manual

ER•4PT User Manual

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ACCU•Driver™high performance,
balanced armature drivers are
percision matched for an accuracy
response of 86% or better.
Thank you for your purchase of ER•4 MicroPro™earphones,
the world’s most accurate earphones.

INTRODUCTION
ER•4 MicroPro earphones were the first noise-isolating high-fidelity in-ear
earphones to use ACCU•Driver™high performance, balanced armature drivers.
These high-definition transducers combine flat frequency response with
passive noise isolation. Noise reduction with ER•4 earphones occurs naturally
when the eartips are sealed in the ear canals.
ncluded with the earphones is the Channel-matching Compliance Graph
showing frequency response curves of each custom-tuned,balanced
armature driver.
An assortment of ACCU•Fit™eartips is provided in this package. The triple-
flange eartips reduce sound an average of 35 dB, which is approximately
98% noise reduction. The foam eartips provide slightly more (42 dB) sound
reduction. Lowering outside sound allows you to hear the full dynamic range
of the recording without having to play it at unsafe levels.
The ER•4 MicroPro series earphones produce the highest sound quality of any
high-definition earphones on the market today. We hope you enjoy them.
Etymotic Research
You know your music. Etymotic know your ears.
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ABOUT ET YMOTIC RESEARCHSYSTEM INCLUDES
• ER•4PT earphones
• 5 ft cord with 3.5 mm stereo plug
• 1⁄4" stereo phone adapter plug
• Assortment of ACCU•Fit™eartips
• Filter changing tool and replacement
ACCU•Filter™wax filters
• Shirt clip
• Airline adapter
• Travel pouch
• Storage box
• Channel-matching compliance graph
Accessories are available at www.etymotic.com.
Storage Box

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PROPER CARE
• Do not expose the earphones to extreme temperatures.
• Avoid dropping and strong impact.
• Leave eartips on the earphones for shock protection.
• Do not pull on the cord to remove the earphone from the audio
device or the ear.
• Clean or replace ACCU•Fit™eartips prior to use by others.
• For best performance and retention in the ear,replace
ACCU•Fit™3-flange eartips every 3-6 months.
• Replace ACCU•Fit™foam and glider eartips frequently.

SELECTING AN ACCU•FIT EARTIP
Over time, eartips may lose their elasticity. For best performance and
retention, replace 3-flange eartips every 3-6 months. Replace foam and
glider eartips frequently.
To clean ACCU•Fit™3- lange eartips:
1. Remove the eartip from the earphone.
2. Clean with water and mild soap.
3. Dry the eartip before placing it back on the earphone.
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CLEANING AND REPLACING ACCU•FIT EARTIPS
The ACCU•Fit™eartip that is most comfortable is the likely choice, but it MUST
SEAL well in your ear. f you can easily hear others when the device is off,you
don’t have a good seal. Twist it in deeper,or choose another eartip.
When changing eartips
make sure the eartip its
securely on the stem o
the earphone. correct incorrect
smallLarge
Foam Glider3- lange

PROPER INSERTION
Important: Sound quality, full bass response and noise isolation all depend
on a good ACCU•Fit™eartip seal in the ear canal.
See a video demonstration at www.etymotic.com.
• Carefully insert the earphone
while pulling up and out on
the back of the ear.
• Twist the earphone up into the
ear canal while inserting,
until outside noise is blocked out.
•3- lange eartip: Moistening eases
insertion.
•Foam eartip: Roll down or compress foam eartip before inserting. Hold
the eartip in place for about 5 seconds while the foam expands to create a
tight seal in the ear canal.
•Glider eartip: Simply push into ear canal.
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Remove earphones slowly with a twisting motion to gradually break the seal.
Do not pull on the cable to remove the earphones.
REMOVAL

ACCU•FILTERS
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Etymotic earphones have special ACCU•Filter™wax filters that smooth the
frequency response and prevent earwax from entering the earphones.An
ACCU•Filter is located at the end of the earphone and is visible when the
eartip is removed. f a filter becomes clogged,it should be replaced.
A dirty ACCU•Filter will reduce earphone output. The filter should be changed
if loudness decreases or the sound quality declines. Note: ACCU•Filters are
not reusable.
ACCU•F lter Removal Note: Use the tool to remove the ilter.
ACCU•F lter Replacement Note: Do not use the tool to replace the ilter.
1. Remove Eartip. 2. Insert tool into
the ilter.
3. Remove ilter.
1. Insert a new ilter. 3. Re-attach eartip.
2. Press gently
against a hard
sur ace to secure
the ilter in place.

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SPECIFICATIONS
Response Accuracy: 86%
No se Isolat on: 35-42 dB
Frequency response: 20 Hz - 16 kHz
Acoust c polar ty: + electrical = + acoustic
Transducer type: balanced armature
1 kHz sens t v ty: 108 dB SPL for a 0.2 V input (102 dB @ 0.1 V; 106 dB @ 1mW)
Impedance: 27 Ohms nominal
Max mum output: 122 dB SPL
Max mum cont nuous nput: 0.75 Vrms
Cable: 5' with 3.5 mm stereo plug
We ght: less than 1 oz.
Response of ER•4PT Earphones (measured at eardrum)
The gray line is the ER•4PT earphones response curve.The dashed line is the target
response of the open ear to a live performance. The solid black line represents how a
listener perceives the sound.

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CAUTION
n rare instances an eartip may come off in the ear canal when removing the
earphone. f this should occur and the eartip cannot be easily removed,it is
recommended that you promptly contact an audiologist or other medical
professional.A professional can use blunt tweezers to remove the eartip.
Consult an audiologist or physician if you have excessive ear wax,difficulty
inserting the eartips, or discomfort after prolonged use.
Etymotic earphones exclude most external sounds. t is unsafe to use in-ear
earphones while operating a motorized vehicle, operating machinery,
bicycling or jogging,because you may not be alerted to potential danger.
Do not listen at excessively loud levels.Research confirms that earphones that
seal the ear canal allow listeners to listen at safer levels.Noise-induced
hearing loss is a function of exposure time, the average sound level and the
peak of very loud sounds.A sealed eartip and lower listening levels allow for
longer periods of safe listening.