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E R • 4 P T U s e r M a n u a l
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Thank you for your purchaseof ER•4 MicroPro™earphones,
the world’s most accurate earphones.
ACCU•Driver
™
high performance,
balanced armature driversare
percision matchedfor an accuracy
response of 86%or better.
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INTROD U C T I O N
ER•4 MicroProearphones were thefirst noise-isolating high-fidelity in-ear
earphones to useACCU•Driver™high performance,balanced armature drivers.
These high-definition transducers combine flatfrequency response with
passive noise isolation. Noise reduction with ER•4 earphones occurs naturally
when the eartips aresealed in the ear canals.
Included with the earphones is the Channel-matching Compliance Graph
showing frequency responsecurves of each custom-tuned,balanced
armature driver.
™
An assortment of ACCU•Fit
flange eartips reduce sound an averageof 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 havingto play itat unsafe levels.
The ER•4 MicroPro series earphonesproduce the highestsound quality of any
high-definition earphones on the market today. We hopeyou enjoy them.
Etymotic Research
You know your music. Etymotic know your ears.
eartips is provided in this package. The triple-
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ABOUT E T Y M O T IC RESEAR C HSYSTEM I N CLUDES
• ER•4PTearphones
• 5 ft cord with 3.5 mm stereo plug
• 1⁄4" stereo phone adapter plug
• Assortment of ACCU•Fit
• Filterchanging tool and replacement
ACCU•Filter
™
• Shirt clip
• Airline adapter
• Travel pouch
• Storage box
• Channel-matching compliance graph
™
eartips
wax filters
Accessories areavailable at www.etymotic.com.
Storage Box
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PROPER C A R E
• Do notexpose the earphones to extreme temperatures.
• Avoid dropping andstrong impact.
• Leave eartips on the earphones for shock protection.
• Do notpull on the cord to remove the earphonefrom the audio
device or theear.
• Clean orreplace ACCU•Fit
• For best performance and retention in the ear,replace
™
3-flange eartips every 3-6 months.
ACCU•Fit
• Replace ACCU•Fit
™
eartips prior to useby others.
™
foam and glider eartips frequently.
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SELECT I N G AN AC C U •FIT EAR T I P
Foam Glider3-flange
smallLarge
The ACCU•Fit™eartip that is mostcomfortable is the likelychoice,but it MUST
SEAL well inyour ear. If you can easily hear otherswhen the deviceis off,you
don’t have a good seal. Twist it in deeper,or choose another eartip.
When changing eartips
make sure theeartip fits
securely on thestem of
the earphone.
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CLEANI N G AND REPL ACI N G ACCU• F I T EARTIPS
Over time,eartips may lose their elasticity. For best performance and
retention,replace 3-flangeeartips every 3-6 months. Replace foam and
glider eartips frequently.
™
To clean ACCU•Fit
1. Remove the eartip from the earphone.
2. Clean with water and mildsoap.
3. Dry the eartip before placing it backon the earphone.
3-flange eartips:
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PROPER I N SERTION
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.
• Carefullyinsert the earphone
while pulling up and out on
the back of the ear.
• Twist the earphoneup into the
ear canal while inserting,
until outside noiseis blocked out.
• 3-flange eartip: Moistening eases
insertion.
• Foam eartip: Roll down or compress foam eartip beforeinserting. Hold
the eartip in placefor about 5 seconds while the foamexpands to create a
tight seal inthe ear canal.
• Glider eartip: Simplypush into earcanal.
REMOVA L
Remove earphones slowly with a twisting motionto gradually breakthe seal.
Do not pull onthe cable toremove the earphones.
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ACC U • F ILT E R S
Etymotic earphones have special ACCU•Filter
™
wax filters that smooth the
frequency response andprevent earwax fromentering the earphones.An
ACCU•Filteris located at the end ofthe earphone and is visible when the
eartip is removed. If a filter becomes clogged, it should be replaced.
A dirty ACCU•Filter will reduceearphone output. The filter shouldbe changed
if loudness decreasesor the sound quality declines. Note:ACCU•Filtersare
not reusable.
ACCU•Filter Removal Note:Use the tool to remove the filter.
1. Remove Eartip. 2. Insert tool into
the filter.
3. Remove filter.
ACCU•Filter Replacement Note: Do not use the tool to replace the filter.
1. Insert a new filter. 3. Re-attach eartip.
2. Press gently
against a hard
surface to secure
the filter in place.
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SPECIF I C ATIONS
Response Accuracy:86%
Noise Isolation: 35-42 dB
Frequency response: 20Hz - 16kHz
Acoustic polarity: +electrical = + acoustic
Transducer type:balanced armature
1 kHz sensitivity:108 dB SPL for a 0.2V input (102 dB @ 0.1V; 106 dB@ 1mW)
Impedance: 27Ohms nominal
Maximum output: 122dB SPL
Maximum continuous input:0.75 Vrms
Cable: 5' with 3.5mm stereo plug
Weight: lessthan 1 oz.
Response of ER•4PT Earphones (measured at eardrum)
The gray lineis the ER•4PT earphones response curve.The dashed line isthe target
response of theopen ear toa live performance. The solid black line representshow a
listener perceives thesound.
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CAUTIO N
In rare instances an eartip maycome off in the ear canal whenremoving the
earphone.If this shouldoccur 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 ifyou have excessive ear wax, difficulty
inserting the eartips,or discomfort after prolonged use.
Etymotic earphones exclude most external sounds. It is unsafe to use in-ear
earphones while operatinga motorized vehicle,operating machinery,
bicycling or jogging,because you may notbe alerted to potential danger.
Do not listen at excessively loud levels.Research confirmsthat earphones that
seal the ear canal allow listeners to listen atsafer levels.Noise-induced
hearing loss is a function of exposuretime,the averagesound level and the
peak of very loudsounds.A sealed eartip and lower listening levels allow for
longer periods of safe listening.
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WAR R A N T Y
Etymotic Research warrants this product against defects in materialor
workmanship for aperiod of twoyears from thedate of originalpurchase
from an authorized Etymotic distributor or reseller.
Etymotic will repairor replace the defective product atits option if returned
within the warrantyperiod to ourservice facility. This warranty isin lieu of
all other warranties,expressed or implied,including,but not limited to any
implied warranty ofmerchantability or fitnessfor a particular purpose.
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ABOUT E T Y M O T IC RESEAR C H
Etymotic Research hasspent over twenty-five years refiningin-ear
technology for precision monitoring and critical listening.Etymotic's original
insert earphone design,developed for auditory research and clinical testing,
used balance armature receivers and established these speakers as the gold
standard for high-definition,in-ear earphones.ER•4 MicroPro earphones
were the first earphones commercializedusing this technologyand are
recognized asthe world leader for response accuracy to which all other
earphones are compared.
Etymotic’s engineering team is led by founder Dr.Mead Killion, audiologist,
engineer,inventor and jazz musician.Etymotic’s audio engineers, musicians
and audiologists workingtogether have generated over 100 patents issued
and pending.
Etymotic’s mission is to design products that measure,improve andprotect
hearing.Etymotic’s products areused by musicians and others who insiston
superior sound quality.Etymotic means“true to the ear.”
ETYMOTIC RESEARCH INC.
61 Mar tin Lane • Elk Grove Village, IL 60007
www.et ymoti c.c om • 888 -389- 668 4 • 8 47-22 8-0 006
ER•4 MicroPro,ACCU•Technology,ACCU•Drive, ACCU•Fit,and ACCU•Filter aretrademarks of Etymotic Research,Inc.
©2010 ER004560
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