User guide

61
Configuring the G65
Digital Surround
Controller
This section explains how to use the Sine/Sub/Sens
controls to check for room resonances, adjust the
subwoofer crossover frequency, or adjust the sensitivity
of the analogue sources.
To display the Sine/Sub/Sens controls
If necessary, unlock the digital surround controller as
described in Configuration Wizard , page 44.
Select a source and press More until the bottom line
of the display shows:
3INE3UB3ENS
2ADIO4RIFIELD
Press Sine/Sub/Sens.
The bottom line of the display shows the Sine/Sub/
Sens controls:
3INE 8OVER 3ENS
2ADIO4RIFIELD
Subwoofer crossover frequency
The G65 Digital Surround Controller allows the
crossover frequency for any subwoofers which you
have to be adjusted between 30 and 150Hz. The
crossover can be set independently for Music, Logic,
and 5.1 Movie layouts. The default is the THX standard
of 80Hz.
To adjust the subwoofer crossover
frequency
Select a source, then display the Sine/Sub/Sens
controls as described above.
Press Xovr- or Xovr+ to decrease or increase the
crossover frequency.
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The display shows the current crossover frequency:
Sine -Xover+ -Sens.+
C
D Xover 85Hz
For THX loudspeaker systems you should not adjust
these settings; they should be left at 80Hz. 80Hz is
also the recommended setting for all movie listening.
You may prefer, however, to lower the crossover
frequency for music if the main speakers have good
bass handling down to, say, 50Hz.
Sinewave sweep test
The G65 includes a sinewave signal test, to help you
set the subwoofer crossover frequencies, or check for
room resonances. To avoid possible damage to the
speakers the volume is reduced to 50 on entering the
test.
Warning: This test is very loud. Bass
protection is turned off during this test, and
very loud low-frequency signals may damage
the speakers.
To use the sinewave sweep test
Select a source, then display the Sine/Sub/Sens
controls as described above.
Press Sine to turn on the sinewave signal.
The display shows:
Chan óòô öõú ExitSound
C
D Sine 80.0Hz
An 80Hz sinewave will be played through all channels.
You can change the test signal using the menu keys,
as described in the following sections.
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Using the Sine/Sub/Sens controls