Hold your AirHead so that controls are facing you and the rubber battery door is up. Across
the front of the AirHead are a number of connections and controls.
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Getting to Know Your AirHead Amplifier
On the far left is one of two headphone jacks that fit any 1/8” (mini) headphone plug.
(An adapter is needed if your headphones are terminated to a 1/4” plug.)
The first switch on the left is the power switch. Turn the power switch to the right, to ON,
in order for the amp to function (for both battery pack or AC power). In order to avoid
battery drain, the power switch should be set to OFF when not using the amp.
To the right of the power switch is the green power LED, which indicates whether the
unit is ON (lit) or OFF (unlit).
Just to the right of the power LED is the volume control. Rotate the volume control to the
left to increase volume, and to the right to decrease volume. If using different pairs of
headphones with your AirHead, different headphone efficiencies will most likely mean
that the volume level will need to be adjusted to achieve adequate sound levels in the
headphones.
The clipping indicator flashes when the amp doesn’t have enough voltage to drive the
headphones. This can happen at peak passages when listening at a fairly loud level
and/or with high impedance headphones. It will also flash when the batteries get too
low in voltage to drive the headphones. Mainly, when the clipping indicator starts to
flash at music peaks, it’s time to change the batteries.
To the right of the clipping LED is the process switch. Turn the switch to the right to the
ON position, and the Audio Image Processor is engaged (for normal stereo headphone
listening). In the OFF position, the Processor is bypassed (for listening to mono or
binaural recordings).
On the far right is the second headphone jack. You can connect two headphones to the
AirHead at the same time. It’s best to use the same type of headphone, as the volumes
will be somewhat different unless both headphones are the same efficiency.
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