Specifications

Checking the placement of the monitors
Dynaudio Professional AIR reference manual – 2014-08-28 62
Calibrating the
subwoofers with the
main monitors
About bass management
Bass management is a very important and useful tool
– and it is in general an absolute necessity if you want
to work with a ve channel setup in a small room. For
more information, see “Bass management” on page
118.
Calibration – overview
►
From the home screen, set the volume to -30 dB.
►
Press the ENTER key.
“Bass Management” is displayed.
►
Press the ENTER key again.
“Select Mode” is displayed.
►
Press the UP and DOWN keys until “80 Hz” is
displayed.
►
Navigate to the Calibration submenu – see “Setup
menu ► Monitor calibration” on page 44.
►
Run tracks 40 to 42 from the Dynaudio Profes-
sional AIR test tone sets (low frequency sweeps).
►
If required, adjust level or crossover frequency
settings.
Calibration
Start by setting the volume on the home screen to a
reasonable level – for example, -30 dB.
Set a crossover frequency for bass management – see
“Conguring bass management” on page 38. If you
have no other preferences, we suggest using the 80 Hz
setting.
If measurements or listening to the main monitors in-
dicate uneven level distribution or uneven frequency
response at frequencies above 80 Hz, select a higher
crossover frequency.
Checking the crossover frequency
►
In order to conrm the selected crossover frequen-
cy, use the test Dynaudio Professional AIR test
tone sets . To make sure that you are listening to
one monitor at a time, select one of the main chan-
nels in the Calibrate monitor submenu of the Setup
menu. For a start, select Master Left.
►
Play back the test tone tracks containing the low
frequency sweeps. Listen to the response or
perform sound level measurements if you have a
meter connected.
►
If you have a spectrum analyzer, you can play
the test tone tracks containing full bandwidth pink
noise instead.
►
Any uneven frequency response across the cross-
over frequency should be avoided.
►
Adjust the crossover frequency in the bass man-
agement setup, if necessary.
►
After adjusting one channel, the other channels
should be monitored one by one. Finally, monitor
all channels together.
►
Your system is now calibrated.
There are four other parameters that you should con-
sider with regards to the subwoofer. These parameters
are only available in the Calibrate monitor submenu for
subwoofers.
LFE Low Pass Filter (subwoofer parameter)
Settings: On /Off
When you set LFE Low Pass Filter to On, a very steep
(7th order) low pass lter is activated at 120 Hz. This
will lter out all content above 120 Hz. Use this lter
when no media encoder is in use. Switch it off when
your signal has passed through a media encoder/de-
coder. Most media encoders such as DTS and Dolby
employ an anti-aliasing lowpass lter. Therefore, in a
production environment it is important to use this lter
when monitoring the LFE channel to learn how the sig-
nal will sound after encoding/decoding (i.e., in a domes-
tic or cinema environment).
LFE Gain (subwoofer parameter)
Range: 0 to +14 dB
Use the LFE Gain parameter to boost the LFE channel
by up to 18 dB.
Polarity (subwoofer parameter)
Range: 0 or 180º
If the Subwoofer is placed correctly, setting the Polarity
parameter to 180º should result in a full phase cancel-
lation at the set crossover frequency. If this is not the
case , the Phase parameter described below should be
adjusted.