Using The Sine/Sub/Sens Controls - Meridian G61R Installation Manual

 
C a l i b r a t i n g

Using the Sine/Sub/Sens controls

t h e s y s t e m
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 17.
• Select a source and press More until the bottom line of the
display shows:
• Press Sine/Sub/Sens.
The bottom line of the display shows the Sine/Sub/Sens controls:
Subwoofer crossover frequency
The G61R 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.
The display shows the current crossover frequency:
CD Xover
Sine -Xover+
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 G61R 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.
85Hz
-Sens.+