Portable Headphone AmplifierPHA-3

Connecting to an iPhone/iPad/iPod

You can connect the headphone amplifier to an iPhone/iPad/iPod using the USB cable supplied with your iPhone/iPad/iPod. For details on compatible models, see “Compatible iPhone/iPad/iPod models.”

The headphone amplifier is compatible with audio format files, up to 48 kHz/24 bit PCM.

  1. Turn on the iPhone/iPad/iPod.
  2. Set the INPUT select switch to the position of the iPhone/iPad/iPod connecting port (second position from the left).
  3. Connect the iPhone/iPad/iPod to the iPhone/iPad/iPod connecting port using the USB cable supplied with your device.

Compatible iPhone/iPad/iPod models

You can use the headphone amplifier with only the following models. Update your iPhone, iPad or iPod to the latest software before use. (as of July 2014)

  • iPhone 5s
  • iPhone 5c
  • iPhone 5
  • iPhone 4s
  • iPhone 4
  • iPhone 3GS
  • iPad Air
  • iPad mini with Retina display
  • iPad (4th generation)
  • iPad mini
  • iPad (3rd generation)
  • iPad 2
  • iPad
  • iPod touch (5th generation)
  • iPod touch (4th generation)
  • iPod touch (3rd generation)
  • iPod touch (2nd generation)
  • iPod classic 120GB / 160GB (2009)
  • iPod nano (7th generation)
  • iPod nano (6th generation)
  • iPod nano (5th generation)
  • iPod nano (4th generation)
  • iPod nano (3rd generation)


  • If noise is generated, turn off the connected iPhone/iPad/iPod, then turn it on again.
  • The headphone amplifier only supports the audio playback function of an iPhone/iPad/iPod.
  • You cannot transfer music to your iPhone/iPad/iPod from the headphone amplifier.
  • Do not connect an iPhone/iPad/iPod that is not supported. The headphone amplifier is not guaranteed to work with an unsupported iPhone/iPad/iPod.
  • Sony is not liable for damage/erasure of recorded data caused by using an iPhone/iPad/iPod with the headphone amplifier.
  • Do not disconnect the iPhone/iPad/iPod while operating. Before disconnecting the iPhone/iPad/iPod from the headphone amplifier, stop playback and turn the headphone amplifier off to prevent damage to data.
  • If the sound is distorted, set the equalizer to “Off” or “Flat” on your iPhone/iPad/iPod.
  • Turn on your iPhone/iPad/iPod before connecting it to the headphone amplifier.
  • Depending on an iPhone/iPad/iPod, the sound may become loud suddenly when you adjust the volume.
  • If the battery level of an iPhone/iPad/iPod is too low, charge it before use.
  • Music volume may vary depending on the ring tone of the iPhone and its application. Refer to the operation manual of your iPhone.
  • If the iPhone is set to silent mode, the ring tone may not be heard from the headphones.
  • For details on operating an iPhone/iPad/iPod, refer to its operation manual.
  • An iPhone/iPad/iPod will not be charged when it is connected to the headphone amplifier.
  • If you are listening to music too loudly, the battery may drain even if the DC IN 5V port of headphone amplifier is connected to a computer.