Room Equalization - B&K Reference 50 Owner's Manual

Room Equalization

Usually these settings may be left set to the factory defaults. However, theses settings allow for the correction of
various tonal errors that occur during reproduction of audio in a home theater.
The room equalization menu allows for two types of adjustments.
1) A notch filter that allows you to 'Notch' or reduce the accentuated bass created in a room using multiple
speakers (see Setting up the notch filter) or the capability to use Boundary Gain Compensation for use with a
THX Ultra2 Subwoofer. The Notch filter is not available for use while Boundary Gain Comp is set to Yes.
2) Variable bass and treble shelving filter controls which allow you to configure a default 'Variable' EQ setting that
best suits your listening room needs.
SETUP SPEAKERS
1 Speaker Size
2 Speaker Location
3 Speaker Levels
4 Crossovers + LFE
5 Room Equalization
5 Room Equalization
next item
MENU setup system
ROOM EQUALIZE
From Remote
1 À(UP) or §(DOWN)
2 SEL or ENTER
Setup Boundary Gain Compensation – in order to use Boundary Gain Compensation, your processor must
have THX Ultra 2 Sub set to Yes under Setup Speaker Size.
From Remote
1 À(UP) or §(DOWN)
2 ¶ •
(LEFT) or (RIGHT)
3 À(UP) or §(DOWN)
Using the test tone generator - your processor has a low frequency sine wave generator (20 to 300 Hz)
available as an aid in determining the most offensive frequency to notch. Usually this test tone generator will be
used with the aid of an SPL meter in a similar fashion as that described in Setup Speaker Levels. The tone
generator may also be used to show up any mechanical room vibrations that should be reduced or eliminated.
While active, the generator has adjustable frequency and three selectable output levels.
SEL select
From Front Panel
(UP) or (DOWN)
(ENTER)
From Front Panel
(UP) or (DOWN)
VOLUME KNOB
(UP) or (DOWN)
SETUP ROOM EQUALIZATION
100.0 Hz
THX Boundary Gain Comp
100.0 Hz
Test Tone 100.0 Hz
Notch 150.0 Hz -20.0 dB
Notch Width 146.4 - 153.6 Hz
Bass 320.0 Hz
Treble 10.0 kHz -18.0 dB
Subwoofer Phase
next item adjust
MENU system setup
TEST 100.0 HZ
31
SETUP ROOM EQUALIZATION
THX Boundary Gain Comp
THX Boundary Gain Comp
Test Tone 100.0 Hz
Notch 150.0 Hz -20.0 dB
Notch Width 146.4 - 153.6 Hz
Bass 320.0 Hz +4.5 dB
Treble 10.0 kHz -18.0 dB
Subwoofer Phase Normal
next item adjust
MENU system setup
THX BG COMP NO
Action
move to Room Equalization
activate SETUP EQUALIZATION
Action
move to Boundary Gain Comp
set to Yes, Notch filter settings are now disabled
move to next desired setting
NO
Off
+4.5 dB
Normal
NO
NO
Off