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4 Operating Notes
Note:
4.8 SOUND Settings
Note:
4.9 HEARO 888 DIGITAL Card
(optional)
Refer to fig. 11.
4.10 Replacing Ear Pads
Important!
• IVA PRO LOGIC: The Dolby Surround Pro Logic decoder, in conjunction with the IVA processor, sim-
ulates five loudspeaker channels (front left, center, right and rear left and right) for surround sound in
the headphones. This channel configuration will not change.
We recommend this mode for movies and Dolby Surround recordings.
PRO LOGIC and IVA are lit.
• IVA LOGIC7: The LOGIC7 decoder is on and constantly monitors the input signal. Depending on the
input signal format, the decoder will generate the required number of audio signals. The IVA proces-
sor will simulate the corresponding number of loudspeakers (up to eight for LOGIC7 input signals).
LOGIC7 and IVA are lit.
• IVA STEREO: The IVA processor converts the stereo input signal to a binaural signal. The ear match-
ing function provides a natural sonic perspective with no inside localization.
We recommend this mode for natural reproduction of stereo music and speech signals.
IVA and STEREO are lit.
• STEREO: The Pro Logic decoder, the LOGIC7 decoder, and the IVA processor are deactivated and
you will hear the unchanged stereo input signal in the headphones.
STEREO is lit.
Every time you press the MODE key (9), the required data will be loaded into the transmitter's RAM
memory. This takes about 2 seconds. During this time the audio signal is muted.
• To select the desired SOUND setting NORM, MOVIE, or MUSIC, press the SOUND/CARD key (11)
once or several times. The related label (NORM, MOVIE, or MUSIC) will be lit.
Every time you press the SOUND key (11), the required data will be loaded into the transmitter's RAM
memory. This takes about 2 seconds. During this time the audio signal is muted.
The HEARO 888 DIGITAL Card is a chip card the size of a credit card. It allows you to adjust the sound
of your headphone system optimally to your sense of auditory perception. This will make the sound even
more open and natural than it is with the internal settings.
You can order your HEARO 888 DIGITAL Card directly from AKG Vienna.
At www.akg.com/hearocard, you will find a number of ear matching curves from which you can select the
one where the test signals sounds most natural to you.
When ordering your HEARO 888 DIGITAL Card, state the number of the ear matching curve you select-
ed. The related coefficients are stored on a chip card that will be mailed to you.
1. Place the card in the card well on the transmitter bottom panel with the golden memory chip on the
card facing the transmitter.
2. Push the card into the card slot in the direction of the arrow to the stop.
3. Press and hold the SOUND/CARD key (11) until the CARD label is lit.
All sound presets (NORM, MOVIE, and MUSIC) will be modified by the coefficients of your ear match-
ing curve.
4. To revert to the unmodified internal sound presets, press and hold the SOUND/CARD key (11) until
the CARD label goes dark.
5. By holding the SOUND/CARD key (11) you can compare each internal sound preset with the version
modified by your personal ear matching curve.
6. To remove the card, slide the card against the direction of the arrow to the stop. The card will drop
out of the card well.
1. Rotate the ear pad on each earphone approximately 10° CCW to unlock the bayonet mount and
remove the ear pad.
2. Place one velour ear pad on each earphone and rotate the ear pad approximately 10° CW to the point
that you can feel it has locked.
1. Disconnect the AC adapter from the power outlet.
2. Use a cloth moistened (not wet!) with water to clean the surfaces of the mixer.
Never use caustic or scouring cleaners or cleaning agents containing alcohol or solvents since
these may damage the enamel or plastic parts.
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HEARO 888 DIGITAL
5 Cleaning
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