Portable Headphone AmplifierPHA-1A

Parts and controls

Front side

Rear side

  1. (headphones) jack
  2. POWER/CHG (power/charge) indicator
  3. Power/volume knob
  4. WALKMAN/Xperia/Computer connection INPUT port
  5. iPhone/iPad/iPod connection INPUT port
  6. GAIN select switch
  7. DC IN 5V (charge) port