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

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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

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Adjust the overall volume with the volume knob of
the EAR3MK2 Amp. This will adjust both the music
and the ambient sounds volume at the same time.
Fine tune the desired volume between music and
ambient sounds by using the audio source volume
control.
5 6
Tip: For the audio source to be louder than the ambient sounds, turn up the volume on the audio
source and reduce the EAR3MK2 volume. The following table give some examples on how the
ambient sounds (EAR3MK2) and the audio source affects the desired output volume.
Using these combinations, the ambient sounds and audio source can be fine tuned to suit your
personal listening preference.
EAR3MK2 Volume
(Ambient Sounds) Audio Source Volume Overall Volume
HIGH HIGH LOUD Ambient Sounds
LOUD Audio Source
LOW HIGH LOW Ambient Sounds
LOUD Audio Source
HIGH LOW LOUD Ambient Sounds
LOW Audio Source

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TRANSARENCY MODE OFF
WARNING: Use caution when turning the volume up to higher levels on the EAR3MK2. The
EAR3MK2 has the potential to damage headphones, earphones, helmet speakers, etc., should they
not be rated for 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.
!
When using the EAR3MK2 in environments where
ambient sounds do not need to be heard, disable the
Transparent Mic for the EAR3MK2 to only amplify
the audio source. The sound will be cleaner and
more solid than using a direct signal from your audio
source, and is capable of putting out higher volume
compared to connecting to the audio source directly.
TURNING TRANSPARENCY MODE OFF

IASUS_EAR3MK2_OPERATINGINSTRUCTIONS_v1_2020 13
f o r l a s t e s t n e w s a n d p r o d u c t s ,
f o l l o w u s o n s o c i a l m e d i a
/iasus.concepts
/zerobackgroundnoise
1-YEAR LIMITED WARRANTY
IASUS Concepts Limited warrants that the EAR3MK2 Mobile Amp sold by IASUS Concepts or its authorized
agents is free from defects in materials and workmanship under normal use for one year. This warranty is only
applicable to the original purchaser in possession of a dated sales document receipt that includes the name and
the company from which it was purchased. This warranty is in lieu of and excludes all other warranties, expressed
or implied, including any implied warranty of merchantability or tness, and of any other obligation on the part of
IASUS Concepts Limited.
WHAT THIS WARRANTY DOES NOT COVER
•Damage from improper operation, misuse, neglect such as dropping the product onto hard surfaces, contact with
extreme humidity or heat, or acts of nature (lightning, oods, power surges, etc.).
•Products that may have been tested, adjusted, installed, maintained, repaired or altered in any way by persons
not expressly approved by IASUS Concepts Limited.
•Cords that are stretched, burnt, torn or cut.
•Products purchased more than 12 months previous to the current date.
•Products that are not accompanied by a valid proof of purchase.
TO REGISTER FOR YOUR WARRANTY
You must register your product to receive warranty service. To do so and to view detailed information about our
warranty service, please visit :
https://iasus-concepts.com/warranty/
TO GET WARRANTY SERVICE FROM IASUS CONCEPTS
Please contact our customer service department via our website. Once you have done so, you will receive
instructions on how to ship the products to IASUS Concepts or to one of our designated service centers. If
instructed to ship the product, you must ship it with freight, duties and insurance prepaid. Regardless of where
you are instructed to ship your product, you must include:
•A copy of your dated sales document receipt
•A fully completed Return Materials Authorization (RMA) form.
•Payment for any services or repairs not covered by the warranty. This will have been predetermined with your
customer service representative.
LEGAL INFORMATION
There is no informal dispute settlement mechanism available. This warranty gives you specic legal rights, and you
may also have other rights, which vary geographically. Some areas do not allow limitations on how long an implied
warranty last and/or do not allow the exclusions or limitations or consequential damages. IF this is true for your
area, the above limitations or exclusions may not apply to you. IASUS Concepts shall not be liable for any special
or consequential damages or for loss or expense directly or indirectly arising from use of the product, inability to
use the product in combination with other equipment, or from any other cause. IASUS Concepts reserves the right
to make changes in the design of the product and to make additions or improvements to it without incurring any
obligation to modify any products previously sold.