IASUS EAR3MK2 User manual

IASUS_EAR3MK2_OPERATINGINSTRUCTIONS_v1_2020 1
MODEL NUMBER: IA-E3MK2-AMP
Thank you for choosing the IASUS EAR3MK2 Mobile Amp, the newest evolution in a long line
of IASUS portable audio ampliers. The EAR3MK2 boosts any audio track, giving it a fuller and
more robust sound from a micro and compact form factor, with the signature IASUS quality
and performance many have come to trust.
In addition to boosting volume, the EAR3MK2 also features the embedded Transparent
Mic to introduce transparency into your music by blending in surrounding ambient sounds.
This keeps you safe in no matter what environment you wish to experience premium in-ear
audio.
In this manual are instructions and tips to operating the EAR3MK2 Mobile Amp. Should you
have any questions and require assistance with setup and usage, please feel free to visit our
website or contact us directly at : [email protected]
You must register your product to be eligible for warranty service. To register online, please visit the IASUS Concepts website.
To receive warranty service, you will need to provide a copy of your dated sales receipt to confirm warranty status. Please
retain the original copy for your records.
M O B I L E A M P
www.iasus-concepts.com

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ABOUT THIS MANUAL
WARNINGS
CAUTION
We recommend reviewing this instruction manual in its entirety before using your EAR3MK2 Mobile Amp.
It introduces and explains the EAR3MK2’s features, how to set them up, and correct operation for a rich user
experience that you come to expect from the best performing amp on the market today.
Any changes or modications to this product not expressly approved by IASUS Concepts Ltd. could void the
1-year limited warranty. Should there be any questions or concerns about modications, please contact IASUS.
Do not operate your device at high volume levels when using the EAR3MK2 Amplifier. Hearing experts
advise against continuous exposure to high volume levels. If you experience ringing in your ears,
discontinue using the EAR3MK2 immediately.
Do not turn the volume up too high on the EAR3MK2. This amp has the potential to damage headphones,
earphones, helmet speakers, etc. should they not be rated for a higher audio input. Use the volume
amplification carefully by increasing the volume slowly. Proceed with caution to avoid over boosting your
headphones, earphones, helmet speakers, etc., but most importantly, to avoid permanently damaging
your hearing.
!

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TABLE OF CONTENTS
PACKAGE CONTENTS .......................................................................4
PARTS & CONTOLS REFERENCE ......................................................5
BOOSTING VOLUME AND SAVING BATTERY LIFE...............................6
CHARGING THE EAR3MK2...............................................................6
SPECIFICATIONS...............................................................................5
CONTROLS .........................................................................................7
INSTALLING THE EAR3MK2 .............................................................9
TRANSPARENCY MODE ................................................................. 10
1-YEAR LIMITED WARRANTY ....................................................... 13
CONNECTING THE EAR3MK2..........................................................8
POWER ON/OFF ............................................................................ 7
VOLUME + / -................................................................................ 7
TURNING TRANSPARENCY MODE ON........................................ 10
TURNING TRANSPARENCY MODE OFF ...................................... 12

IASUS_EAR3MK2_OPERATINGINSTRUCTIONS_v1_2020 4
EAR3MK2 AMPLIFIER
A.......... EAR3MK2 Amplifier
B.......... Steel Clip
C.......... IA SNR Buds (Sold Separately)
ACCESSORIES
D.......... 3.5mm to USB-A Charging Cable
E.......... Extension Cable
A
B
C
D E
PACKAGE CONTENTS

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PARTS & CONTROLS REFERENCE
1.......... Transparency Mode Switch On/Off
2.......... Mic for Transparency Mode
3.......... Input 3.5mm jack Cable
4.......... Output 3.5mm jack Plug
5.......... Volume Knob
6.......... Steel Clip
7.......... Charging indicator LED
8.......... Lanyard Loop
1
8
4
5
6
2
7
3
SPECIFICATIONS
51mm x 37mm x 20mm
2" x 1-3/8" x 3/4"
30g | 1oz
OPERATION ............20 HOURS /charge
CHARGING TIME ......................3 HOURS
BATTERY CAPACITY .................150mAh
BOOST .................................10Hz to 100Hz +0/-0.1dB
OUTPUT ........................... 55mW / channel x2 @ 16Ω
S/N RATIO .....................................100dB@32Ω, 20mW
FREQ RESPONSE..........10Hz to 100Hz +0/-0.1dB
DIMENSIONS
WEIGHT
BATTERY AUDIO

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BOOSTING VOLUME
AND SAVING BATTERY LIFE
CHARGING THE EAR3MK2
The EAR3MK2 is powered by an internal,
non-removable lithium-ion battery. It is pre-charged,
enabling the EAR3MK2 to be ready for use right out
of the box.
When charging is required, connect the included
charging cable (D) to the input jack (3) at the bottom
of the unit and the other end to a computer USB
port.
When charging, the Charging Indicator LED (7) is lit
red and will turn off when charging completed.
A full charge can be completed in about 3 hours
when charged using a computer’s USB port (0.5A
output). Each charge allows for usage of up to 20
hours, depending on the output volume level and
ambient temperature.
To prolong the life of the battery cells, IASUS does
not recommend charging the EAR3MK2 using high
output USB chargers (ie. 1.0A, 2.1A, etc).
Note: If the EAR3MK2 will not be used for a prolonged period, fully charge the unit before storing
to prevent permanent damage to the battery.
One of the EAR3MK2’s main features is amplifying
your audio source’s signals to higher and sufcient
levels for your headphones, earphones, etc. This
results in the fuller and richer sound one comes to
expect from IASUS portable ampliers.
Another main feature is conserving the power on
your audio source (smartphone, music player...)
Example: Lowering the volume on your phone
and turning up the EAR3MK2 will allow you
to achieve the same desired volume while
saving your phone’s battery power.
WARNING: Do not turn the volume up too
high on the EAR3MK2. It have the potential
to damage headphones, earphones, helmet
speakers, etc., should they not be rated
for a higher audio input. Use the volume
amplification slowly and proceed with caution
to avoid over boosting your headphones,
earphones, helmet speakers, etc., but most
importantly, to avoid permanently damaging
your hearing.
!
!
Use only the included IASUS charging
cable. Using any other charging cable
may cause permanent damage to the
EAR3MK2 amp.

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CONTROLS
The EAR3MK2 is equipped with the IASUS signature
CNC-machined and knurled aluminum volume knob
for an enhanced grip, even when operating with
gloves.
Power on the amp and continue turning clockwise to
your desired volume level.
To power on the EAR3MK2 and increase the volume,
turn the volume knob clockwise until you hear and
feel a click.
To power off the EAR3MK2, turn it counter-clockwise
until you hear and feel the click.
To decrease the volume, turn it counter-clockwise.
CLICK
POWER ON/OFF
VOLUME + / -
WARNING: Do not turn the volume up too high on the EAR3MK2. Please exercise extreme caution
when doing so. It has the potential to damage headphones, earphones, helmet speakers, etc.,
should they not be rated for a higher audio input. Use the volume amplification slowly and proceed
with caution to avoid over boosting your headphones, earphones, helmet speakers, etc., but most
importantly, to avoid permanently damaging your hearing.
!

IASUS_EAR3MK2_OPERATINGINSTRUCTIONS_v1_2020 8
CONNECTING THE EAR3MK2
AUDIO OUT
AUDIO SOURCE
EXTENSION CABLE
(OPTIONAL)
OUTPUT JACK
INPUT JACK
SMARTPHONE,
MUSIC PLAYER...
HEADPHONES,
EARPHONES...
Note: While the EAR3MK2 Output Jack supports headsets and earbuds with an inline mic, any
mic input will not pass through the Mobile Amp and into the audio source. A smartphone will not
receive any input from that mic.
Some devices may require to use
a dongle adapter to connect the
3.5mm jack plug.

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INSTALLING THE EAR3MK2
The EAR3 is equipped with a clip for a secure placement onto clothing, bags,etc.

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TRANSPARENCY MODE
One of the unique features of the EAR3MK2 is
the Transparent Mic. With the ick of a switch on
the side of the unit, the ambient sounds from your
surroundings are mixed in with the audio source,
enabling you to be aware of what’s around you as
you enjoy your amplied audio.
Mixing ambient sounds into your audio source is simple and convenient to do:
Power on EAR3MK2 Amp by turning the volume
knob (5) until you hear and feel a click.
Adjust EAR3MK2 volume for ambient sounds by
slowly turning the volume knob.
On the side of the EAR3MK2, slide the
TRANSPARENCY MODE switch to the ON position.
Play a track on the audio source and adjust the
volume on it to your liking.
TURNING TRANSPARENCY MODE ON
1
3
2
4
CLICK
TRANSARENCY MODE ON