Prolude Amplification BHN450 User Manual page 10

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5.1.14 Line Out
Balanced Line Out with Neutrik XLR connector. It gives a high quality line level signal to be used for PA or a
recording system. The -15dB button reduces the signal level and the GND Lift button disconnects pin 1 of
the XLR connector.
Note:
In most cases the GND Lift button has to be unpressed! When you get ground loop, hum or buzz while
connecting to PA or a recording system pressing the button may help to eliminate this.
The Phone output provides an unbalanced, higher signal level. You can use it also for connecting to a
computer's soundcard.
5.1.15 Mains
You switch on the amplifier with this switch. After switching on there is a ventilator test for about 5 seconds,
after which the amplifier is in ready mode.
Important:
Please avoid switching on and off the amplifier too often, especially after playing at high volume level! After
playing at high volume level give the ventilator a few minutes to cool down the amplifier before switching it
off!
5.1.16 Mute LED
Multifunctional feedback LED.
Bright when:
-
the Mute button is pressed;
Or if unpressed:
-
after switching on, during the ventilator test
-
when the power stage is overheated
-
when the power stage is in a fault state
5—10

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