IASUS EAR3H User manual

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 1
H E L M E T A M P
MODEL NUMBER: IA-E3H-AMP
Thank you for choosing the IASUS EAR3H Helmet Amp, the newest evolution in a long line
of IASUS portable audio ampliers. The EAR3H 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 EAR3H 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.
The EAR3H is based on the EAR3 Micro Amp, but with a special attachement designed for
helmet users - an IASUS proprietary quick release mounting system. Just snap it on and go.
In this manual are instructions and tips to operating the EAR3H Helmet 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.
www.iasus-concepts.com

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 2
ABOUT THIS MANUAL
WARNINGS
CAUTION
We recommend reviewing this instruction manual in its entirety before using your EAR3H Mobile Amp.
It introduces and explains the EAR3H’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 EAR3H Amplier. Hearing experts advise
against continuous exposure to high volume levels. If you experience ringing in your ears, discontinue using
the EAR3H immediately.
Do not turn the volume up too high on the EAR3H. This amp has the potential to damage helmet speakers,
earphones, headphones, etc., should they not be rated for a higher audio input. Use the volume amplication
carefully by increasing the volume slowly. Proceed with caution to avoid over boosting your helmet speakers,
earphones, headphones, etc., but most importantly, to avoid permanently damaging your hearing.
!

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 3
TABLE OF CONTENTS
PACKAGE CONTENTS .......................................................................4
PARTS & CONTOLS REFERENCE ......................................................5
BOOSTING VOLUME AND SAVING BATTERY LIFE...............................6
CHARGING THE EAR3H ....................................................................6
SPECIFICATIONS...............................................................................5
CONTROLS .........................................................................................7
MOUNTING THE EAR3H ONTO A HELMET.................................. 11
TRANSPARENCY MODE ................................................................. 12
1-YEAR LIMITED WARRANTY ....................................................... 15
CONNECTING THE EAR3H ...............................................................8
POWER ON/OFF ............................................................................ 7
AUDIO SOURCE ............................................................................. 9
AUDIO OUT .................................................................................. 10
VOLUME + / -................................................................................ 7
TURNING TRANSPARENCY MODE ON ........................................ 12
TURNING TRANSPARENCY MODE OFF ...................................... 14

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 4
EAR3H AMPLIFIER
A.......... EAR3H Amplifier
B.......... Quick Release Clip
C.......... XSound 3 Helmet Speakers (Sold Separately)
ACCESSORIES
D.......... 3.5mm to USB-A Charging Cable
E.......... Short Extention Cable
F.......... Long Extension Cable with right
angled plug
G.......... Quick Release Mount
H......... 3M Double Sided Adhesive
A
B
C
D E
F
HG
PACKAGE CONTENTS

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 5
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.......... Quick Release 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

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 6
BOOSTING VOLUME
AND SAVING BATTERY LIFE
CHARGING THE EAR3H
The EAR3H is powered by an internal, non-removable
lithium-ion battery. It is pre-charged, enabling the
EAR3H to be ready for use right out of the box.
When charging is required, connect the included
charging cable to the input jack 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 EAR3H using high
output USB chargers (ie. 1.0A, 2.1A, etc).
Note: If the EAR3H will not be used for a prolonged period, fully charge the unit before storing to
prevent permanent damage to the battery.
One of the EAR3H’s main features is amplifying
your audio source’s signals to higher and sufcient
levels for your helmet speakers and earphones. 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 EAR3H 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 EAR3H. It have the potential
to damage helmet speakers, earphones,
headphones, 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 helmet speakers,
earphones, headphones, 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
EAR3H.

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 7
CONTROLS
The EAR3H 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 EAR3H and increase the volume,
turn the volume knob clockwise until you hear and
feel a click.
To power off the EAR3H, 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 EAR3H. Please exercise extreme caution when
doing so. It has the potential to damage helmet speakers, earphones, headphones, 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 helmet speakers, earphones, headphones, etc., but most importantly, to
avoid permanently damaging your hearing.
!

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 8
CONNECTING THE EAR3H
AUDIO OUT
AUDIO SOURCE
LONG
EXTENSION CABLE
(OPTIONAL)
SHORT
EXTENSION CABLE
(OPTIONAL)
OUTPUT JACK
INPUT JACK
HELMET COMM SYSTEM,
SMARTPHONE,
MUSIC PLAYER...
HELMET SPEAKERS,
EARPHONES...
Note: While the EAR3H Output Jack supports headsets and earbuds with an inline mic, any mic
input will not pass through the EAR3 and into the audio source. A smartphone will not receive
any input from that mic.
IASUS Rekon Helmet Comm System
Sold Separately

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 9
CONNECTING THE EAR3H
Connect the Audio Source into the Input jack (3) of
the EAR3H Amp.
In most cases when installing onto a large helmet, use the
included extension cable with right angle plug to connect the
EAR3H Amp with your audio source (helmet comm, smartphone,
music player...).
IASUS Rekon sold separatelyIASUS Rekon sold separately
AUDIO SOURCE

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 10
CONNECTING EAR3H
Connect helmet speakers, or earphones directly into
the Output jack (4) of the EAR3H Amp.
If needed, use the included short extension cable. For a tidy
installation, cables can be tucked behind the helmet padding.
AUDIO OUT
IASUS XSound 3 sold separately IASUS XSound 3 sold separately

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 11
MOUNTING THE EAR3H ONTO A HELMET
The EAR3H utilizes the included IASUS proprietary quick release system. To install, follow these steps:
Clean the mounting surface of your helmet.
Secure the EAR3H onto the Quick Release Mount (G).
Peel the second backing paper on the 3M Adhesive.
Position on your helmet and press rmly.
To remove EAR3H from the mount, simply push the
clip away from the amp and slide the unit until it is
fully released.
Peel away the backing paper on the 3M Adhesive (H)
and position in on the Quick Release Mount (G)
1
3 4
21PEEL
2STICK
1PUSH CLIP AWAY
2SLIDE

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 12
TRANSPARENCY MODE
One of the unique features of the EAR3H 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 EAR3H Amp by turning the volume knob
(5) until you hear and feel a click.
Put on the helmet and adjust EAR3H volume for
ambient sounds by slowly turning the volume knob.
On the side of the EAR3H, 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

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 13
Adjust the overall volume with the volume knob of
the EAR3H 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 EAR3H volume. The following table give some examples on how the
ambient sounds (EAR3H) 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.
EAR3H 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

IASUS_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 14
TRANSARENCY MODE OFF
WARNING: Use caution when turning the volume up to higher levels on the EAR3H. The EAR3H
has the potential to damage helmet speakers, earphones, headphones, etc., should they not be
rated for higher audio input. Use the volume amplification slowly and proceed with caution to avoid
over boosting your helmet speakers, earphones, headphones, etc., but most importantly, to avoid
permanently damaging your hearing.
!
When using the EAR3H in environments where
ambient sounds do not need to be heard, disable the
Transparent Mic for the EAR3H 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_EAR3H_OPERATINGINSTRUCTIONS_v1_2020 15
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 EAR3H Helmet 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.