User Manual

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 software,
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 dierent
positions in the same room may require dierent 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