Sony TA-A1ES - Manuel (Page 17)

17 US
Setting the headphones
Set the impedance of the headphones by using the IMPEDANCE
dial.
If you are not sure about the impedance of your
headphones
Set the IMPEDANCE dial to LOW, then, while checking the volume from
the headphones, select a position that produces an appropriate
volume level.
 When you operate the IMPEDANCE dial:
 the sound volume becomes –∞ dB.
 you will hear no sound from the headphones for about 8 seconds. Do
not turn up the volume during this period.
 If it is set to PHONES OFF, you will hear no sound from the headphones.
 If it is set to LOW/MID/HI, you will hear no sound from the speakers.
Setting the auto standby function
When the AUTO STANDBY switch is set to ON, the amplifier switches
to standby mode automatically when the output level from the
speaker or headphones has been lower than a certain level for about
10 to 15 minutes (Auto standby function). Therefore, if you listen to
music at a low volume for a while, the auto standby function may be
activated. In this case, set the AUTO STANDBY switch to OFF.
The output level at which the auto standby function is activated, or the
time when the amplifier switches to standby mode differs, depending
on the conditions under which you are using the amplifier.
Dial position Impedance of headphones supported
LOW from 8 ohms to less than 50 ohms
MID from 50 ohms to less than 300 ohms (+10 dB against
LOW)
HI 300 ohms or higher (+16 dB against LOW)
Notes
IMPEDANCE dial
AUTO STANDBY switch