KH 80 DSP |
12
Adjusting the frequency response using the backpanel
controls
When the LOW MID control is set to FREE STANDING or, via the Neumann .Control iPad
®
App,
the acoustical controls have been set to 0 dB, the KH 80 DSP loudspeaker is designed to have
a flat frequency response in anechoic conditions . When the loudspeaker is installed in your
monitoring environment, the response changes . The same loudspeaker installed in different
positions in the same room may require different acoustical control settings . In a symmetrical
installation, left/right pairs (front or back) will probably have the same acoustical settings .
X
Before using your loudspeaker system for the first time, align the frequency response of the
loudspeakers in the room in order to obtain the desired response .
X
Repeat the above step if you change the physical conditions in your studio .
X
At your listening position, determine the frequency response of each loudspeaker .
X
Use the ACOUSTICAL CONTOL switch to compensate for the acoustical loading in the low-
mid frequency range due to nearby large solid objects (e .g . mixing consoles, desks or com-
puter screens) .
ACOUSTICAL CONTROL switch
Possible settings
Low-Mid
Free Standing (0 dB),
Small Desk (-1 .5 dB),
Medium Desk (-3 dB),
Large Desk (-4 .5 dB)
Adjusting the acoustic level
X
On your KH 80 DSP loudspeakers, set the OUTPUT LEVEL switch to 94 dB SPL and the INPUT
GAIN control 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 using 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 input and output level of the KH 80 DSP:
Input signal
dBu
0
(0 .775 V)
0
(0 .775 V)
+4
(1 .23 V)
-
20
(77 .5 mV)
INPUT GAIN control
dB
0
-
15
-
4
-
15
OUTPUT LEVEL switch
dB SPL
100
100
94
114
Sound pressure level
dB SPL at 1 m
100
85
94
79
EN
