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QuietComfort® 20i Acoustic Noise Cancelling™ headphones – Apple® devices

Sold from 2015 – 2015

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Connecting headphones to your system

You can connect headphones to your system for situations when low volume listening is needed. This can be useful, for example, to listen to audio at night without disturbing others in your home with the sound from your speakers.

Connecting your headphones to a computer.

Insert the headphone cable connector into the 1/8-inch (3.5 mm) audio output jack on the computer. Here are some tips for finding the correct jack:
  • It might be labelled Audio Out, Line Out or Headphones. It could also have a headphones icon or an icon of an arrow pointing out of a circle
  • On PCs, it is typically a green colored jack
  • On Macs, it is typically a jack labelled with a headphones icon

Connecting your headphones to a portable audio device.

Insert the headphone connector into the 1/8-inch (3.5 mm) headphone input on the portable audio device. For more information refer to the device manufacturer.

Connecting headphones to a Wave system

Insert the headphone connector into the 1/8-inch headphone input on the back of the radio. Note: Connecting headphones mutes the speakers.

Connecting headphones to a Lifestyle DVD system.

Insert the headphone connector into the 1/8-inch headphone jack on the right side of the media center. Please note: connecting headphones mutes the speakers

Connecting headphones to a Lifestyle single-CD system.

If the entire top of the music center console opens:
  • Inseert the headphone connector into the 1/8-inch headphone jack on the right side of the music center
  • Connecting headphones mutes the speakers
If only the right top of the music center console opens:
  • Insert the headphone conneector into the 1/8-inch headphone input on the left side of the music center
    • With a CD5 or CD5V:
      • Connecting headphones mutes the Speakers A output but not the Fixed or Speakers B outputs
    • With a CD5V2:
      • Connecting headphones mutes the Speakers A and Fixed outputs but not the Speakers B output

Connecting headphones to an Acoustic Wave music system II.

  1. Insert the headphone connector into the 1/8-inch headphone input on the back of the radio
  2. Using the system control panel, set the audio output to "Headphones"
    1. Press and hold Menu until "–SETUP MENU–" is displayed
    2. Press Options until "HEADPHONES JACK:" is displayed
    3. Press Adjust to change the setting to HEADPHONES
    4. Press any button other than Menu or Play Mode to exit the setup menu. The system will automatically exit the setup menu after 10 seconds of inactivity
Note: Connecting headphones mutes the speakers

Connecting headphones to a Lifestyle multi-CD system.

If the system is operated by a white remote control:
  • Insert the headphone connector into the 1/8-inch headphone input on the right side of the music center
  • Connecting headphones mutes the speakers
If the system is operated by a touch-screen controller:
  • Headphones cannot be connected to this system

Connecting headphones to a Lifestyle system with an MC-1 media console.

Insert the headphone connector into the 1/8-inch headphone jack on the right side of the media console. Connecting headphones mutes the speakers.

Connecting headphones to an In-Flight Entertainment System.

Insert the headphone connector into the 1/8-inch (3.5 mm) headphone jack on the In-Flight Entertainment System

Notice the input configurations shown below. Instructions below each image tell you how to connect to each type of input jack


A single 1/8-inch (3.5 mm) jack, found on most portable sources: Use the single plug on the audio cable. No adapter needed


One 1/8-inch (3.5 mm) jack and one power jack: Use the single plug on the audio cable in the 1/8-inch jack (the larger jack). No adapter needed. The smaller, power jack does not need a connection

Nothing should be connected to the 2.5 mm power jack, including any adapters for various phones. Doing so may cause damage to the headset. There is also the possibility of personal injury


Two 1/8-inch (3.5 mm) jacks: Use of a dual mono 1/8-inch (3.5 mm) to single stereo 1/8-inch (3.5 mm) adapter is needed


One power jack and two 1/8-inch (3.5 mm) jacks: Use of a dual mono 1/8-inch (3.5 mm) to single stereo 1/8-inch (3.5 mm) adapter is needed. The smaller, power jack does not need a connection

When removing a jack or adapter, grab it at its base and gently pull it away from the connection (do not pull the cord)

Nothing should be connected to the 2.5 mm power jack, including any adapters for various phones. Doing so may cause damage to the headset. There is also the possibility of personal injury.
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