Koss HB90s Operating Instruction
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Components:
The HB70s / HB80s / HB90s IR wireless stereophone includes the following components:
1. Heaband
2. Battery Door
3. LED
4. Power On/Off
5. Noise Cancellation On/Off (HB90s ONLY)
6. Channel Selector A/B (HB80s, HB90s ONLY)
7. Volume Contorl
Insert Batteries
1. Locate the battery door on the right earcup.
2. To open the battery door, insert a flat-ended object (like a key) into the slot.
3. Gently open the door.
4. Insert 2 "AAA" batteries.
5. Close battery door(s).
Turn on wireless operation
1. Locate the power on/off button on the right earcup.
2. Press button to "on".
3. The LED will be red when the unit is powered on.
Set Volume Control
1. Locate the volume control on the left earcup.
2. Adjust the volume to a comfortable setting.
Turn on noise cancellation (HB90s ONLY)
1. Locate the noise cancellation button on the left earcup.
2. Press button "on".
Channel Selection (HB80s and HB90s ONLY)
1. Locate the channel selection button on the left earcup.
2. Press this button to alternate between two channels.
Trouble Shooting Guide
Note: The stereophone will not function, and distortion will occur anytime the signal from the screen to the
stereophone is blocked.
No sound from the stereophone
Check that the unit is "on" / Check that the stereophone batteries are fresh and inserted in the correct
direction. /
Adjust volume control.
Distortion, background noise
Verify you are facing the screen / Check batteries.
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HB79s_HB80s_HB90s_Side1.pdf
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