IASUS EAR3 User manual

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EAR3 Micro Amp (IA-E3-AMP)
Operating Instructions v1.0
Introduction
Than you for purchasing the EAR3 Micro Amp. In this document you will find
instructions on operating the EAR3. Should there be any questions, please feel free to
contact us at [email protected].
Package Contents
EAR3 Amp
Micro USB to 3.5mm Audio Input Cable
Micro USB Charging Cable
iASUS Concepts Information Card
EAR3 Layout and Controls

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Charging
The EAR3 comes shipped from iASUS with its internal lithium-ion battery already
charged and ready for use.
When charging is needed, connect the included USB cable to the micro-USB port on the
bottom of the unit and the other end to a computer. The hidden LED recharge indicator
will be lit red when it is charging and turn off when charging is complete.
Operation with MP3 Audio Device or martphone, Volume Adjustment
When the EAR3 is used with a MP3 audio device connected and the EAR3 Mic enabled,
first plug in the audio input cable and also your headphones as shown in the picture.
Ma e sure the cables are all plugged in securely and fully inserted into the base of the
soc et.

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Once everything is connected, turn on your smartphone or mp3 and set the volume at a
low level.
Next, power on the EAR3 by turning the volume nob cloc wise and slide the mic switch
to the "mic on" position.
While listening to the headphones/earphones, turn up the volume slowly until you can
hear the music comfortably.
Spea or tap the EAR3 to hear the outside mic signal. You can test the EAR3 Mic
function by turning off the Mic and you should not be able to hear any surrounding
noises.
In order to set the mic volume to your personal music listening volume level, adjust the
volume on the EAR3 to increase the mic volume and music volume. However, if you use
your “source" smartphone or mp3 volume control it only controls the music volume. So
by lowering the music volume from the "source" will result in a proportionally louder
mic volume.
If you want the music to be louder than the mic, turn up the “source” and reduce the
volume nob setting. Here is a simple table to explain how to optimize the bac ground
noise to music ratio.
Volume Knob Music ource Output
High High High Mic and High Music
Low High Low Mic and High Music
High Low High Mic and Low Music
By following these simple sequences, the combination of environment and bac ground
can be adjusted to suit your personal listening preference.

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Operation with Music only
When operating in an environment that does not require bac ground sound input, you
can turn the mic off and use the volume nob to only amplify your music. The sound
should be cleaner and more solid than using a direct signal from your source.
The volume will also have a much higher level than from the source alone.
**Note - Do not turn the volume too high as the EAR3 does have the potential to
damage headphones and earphones should they not be rated for a higher audio input,
so use the volume amplification slowly with caution to avoid over boosting.
EAR3 Features and pecifications
External Mic on/off switch
Precise analog volume control
Micro USB/Audio input port (3.5mm audio connector cable)*
Audio output 3.5mm audio port *
Metal Clip
Lanyard loop
LED charge indicator (auto-off when charged)
*(supports headsets with mic)
EAR3 pecifications
Boost 10db <0.03% harmonic distortion
Output 55mW per Channel x 2, 16 ohms
S/N ratio 100db @ 32ohms, 20mW
Frequency Response 10Hz to 100Khz +0/-0.1dB
Impedance Input 1 ohm
Impedance Output 16-32 ohm
Operation 20 hours per charge
Weight 30g
Dimensions 51mm x 37mm x20mm