Volume Adjustment

*  This option applies only to the A10.
    
The A10 features volume adjustment buttons for raising and lowering volume, with a readout displaying the output level in half-decibel (dB) steps between the up/down volume buttons (1). To the right of the volume up/down buttons is a speaker mute button to mute the output of the A10 (2).
  
  
  

Source Selection

 This option applies only to the A10.
    
The A10 also features a Source Selection button to the right of the mute button (3). Pressing the source button allows the user to switch between the A10 as the source (4), or an external device connected to the A10's Optical input such as a CD player or TV (5). 
  
  

  

  
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