Bang & Olufsen BeoVision Avant - Technical Sound Guide - Manual (Page 17)

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Setup: Sound: Speaker Groups: PRESETNAME: Speaker Levels
Setup: Sound: Speaker Groups: PRESETNAME: Assisted Speaker Calibration
The Speaker Level setting is used to align
the perceived or measured loudness of
the loudspeakers at the listening
position.
Although Bang & Olufsen loudspeakers
are all factory-calibrated to give the
same output level, different loudspeaker
(or listener) placements and different
room conditions have an effect on the
speaker level at the listening position.
As a result, you will most likely require
some adjustments to optimise your
system.
In order to achieve the optimal settings
for the Speaker Levels, it is highly
recommended that you use a sound
pressure level meter. This can either be
an app on a smart phone or (preferably)
a dedicated unit. Note that, if you are
considering purchasing a sound pressure
level meter for this purpose, a low-
priced device (less than $100) will
produce acceptable results.
The calibration procedure is as follows:
1. Ensure that the correct Speaker Types
have already been entered for each
loudspeaker in your system.
2. Set the sound pressure level meter to
a ‘C’ weighting and ‘Slow’ setting. It
should be placed near the listening
position with the microphone pointed
towards the ceiling.
3. Select a loudspeaker from the menu.
You should hear a noise signal coming
from the loudspeaker you selected.
4. Set the volume (not the Speaker Level)
so that the reading on the sound
pressure level meter is 65 dB SPL.
5. Select a different loudspeaker from
the menu and set its Speaker Level so
that it also produces a reading of 65
dB SPL at the listening position.
6. Continue this process for all
loudspeakers. Note that subwoofers
should also give the same reading
when the SPL meter is set to a ‘C’
weighting.
If you have more than one loudspeaker
assigned to a single output channel (for
example, if you have two Left Surround
loudspeakers) you should calibrate the
two loudspeakers using the same
method as all other loudspeakers. The
television automatically compensates
the speaker levels for the fact that more
than one speaker is used for the same
channel. This compensation is not shown
on-screen.
If you have a mono centre loudspeakers
(for example, a BeoLab 7-4 or a BeoLab
10) you will be asked to calibrate its
speaker level twice – once for each
Power Link channel to which it is
connected.
It should be stated that it is not unusual
for Speaker Level differences to be
required in a given configuration. This
can be due to aspects of the system such
as loudspeaker distances from the
listening position and placement in the
listening room.
Some televisions in the Bang & Olufsen
portfolio give you the option to use an
external microphone to automate the
loudspeaker calibration process. This
procedure works by sending
measurement signals out of each
loudspeaker that has been enabled for
the Speaker Group and measuring their
responses at the listening position. The assisted calibration process is started
from this menu item. You will be guided
through the process by on-screen
instructions.
Note that only the Speaker Distances
and Speaker Levels are adjusted by the
Assisted Speaker Calibration process.
The resulting values are entered into the
respective menus, and can be manually
adjusted afterwards if you wish to do so.