Connecting Ground Lift; Adjusting The Brightness Of The Neumann Logo - Neumann.Berlin KH 120 Manual De Operación

Examples of sound pressure levels as a function of the input and output level of the KH 120:
Input signal
dBu
Input gain KH 120
dB
Output level KH 120
dB SPL
Sound pressure level
dB SPL at 1 m

Connecting ground lift

To avoid unwanted hum or buzz associated with the input signal cables or source equipment,
you can internally disconnect pin 1 of the XLR socket from the loudspeaker electronics' chassis
ground (see table on page 8):
Set the DIP switch [4] ("ground lift") to "Lift".
For safety reasons, the electronics chassis ground is always connected to the mains
power earth pin.

Adjusting the brightness of the Neumann logo

WARNING
Danger of hearing damage due to unexpected high sound pressure levels!
If the Neumann logo is switched off , it is not obvious whether the product is switched on or
off . In this case, unexpected high sound pressure levels can cause hearing damage.
Always set the audio sources connected to the loudspeaker to a low output level before
they deliver an audio signal.
If you switch off or dim the Neumann logo, mention this to everyone who works with this
loudspeaker or the connected audio sources.
To dim or switch off the Neumann logo in low light level environments or when the loudspeaker
is placed behind an acoustically transparent screen:
Set the DIP switch [1] to:
• "On" to switch on the Neumann logo.
• "Off " to switch off the Neumann logo.
Set the DIP switch [2] to:
• "Dim" to dim the Neumann logo.
• "Bright" to not dim the Neumann logo.
When the loudspeaker's protection system is active, the Neumann logo's color changes
from white to red. The brightness of this red limiter indication can be adjusted by
means of the DIP switch [2] ("Dim" or "Bright"). However, you cannot switch off the
limiter indication, as it appears independent of the position of the DIP switch [1].
0 0
(0.775 V) (0.775 V)
0 −15
100 100
100 85
+4 −20
(1.23 V) (77.5 mV)
−4 −15
94 114
94 79
KH 120 | 11
EN