KH 150 AES67 |
15
Adjusting the acoustical level
X
On your loudspeakers, set the OUTPUT LEVEL switch to 94 dB SPL and the INPUT GAIN knob
to
−
15 dB .
X
Play a broadband pink noise test signal that is set to
−
18 dBFS (Europe) or
−
20 dBFS (USA)
on the mixing console’s output level meters .
X
Measure the sound pressure level at the listening position . Use a sound level meter with the
following settings:
• “C” weighted
• Slow integration time
X
Set the OUTPUT LEVEL switch and INPUT GAIN control of your loudspeakers so that the
desired acoustic level is obtained .
Recommended sound pressure levels:
Application
Sound pressure level
Film
85 dB(C)
Broadcast
79 to 83 dB(C)
Music
No defined reference levels
If the Neumann logo flashes red, the loudspeaker’s protection system has been activated . To
avoid this and achieve the desired output level, use larger loudspeakers or add a bass man-
aged subwoofer to the system .
Examples of sound pressure levels as a function of the loudspeaker’s input and output level:
Input signal
dBu
0
(0 .775 V)
0
(0 .775 V)
+4
(1 .23 V)
-20
(77 .5 mV)
INPUT GAIN knob
dB
0
-15
-4
-15
OUTPUT LEVEL switch
dB SPL
100
100
94
114
Sound pressure level
dB SPL in 1 m
100
85
94
79
If your signal source is not used as a reference for the listening level, make sure that the
level of the source is higher and the level on the loudspeakers is lower . This reduces the
self-noise from the source and any extraneous signals in the input line .
114
108
100
94
[dB SPL]
0
-5
ANALOG
AES3 L
AES3 R
MONO
-7,5
-3
-11
-15
*INPUT GAIN
[dB]
*OUTPUT LEVEL
EN
