Meridian Audio 568 - Manual (Page 77)

Configuring the digital surround processor without a computer
70
Levels
These tests allow you to adjust the output level to each speaker
individually, and it follows the general guidelines from Dolby
Laboratories and Lucasfilm. A Sound Pressure Level (SPL) meter
can be useful at this stage; ask your dealer for more information.
In each test the display shows the speaker being tested, and the
current relative level.
For example:
Left +0.0
If you have an on-screen display it shows:
● Use the
> and < keys to move between each of the speakers
in the layout in the sequence: Left, Centre, Right, Side R, Rear
R, Rear L, Side L, and subwoofers.
● Use A and V to adjust the level of the speaker. Ignore any
tonal difference.
For correct THX reproduction you should adjust each speaker to
75dB SPL using an SPL meter. Even if your speakers are not
THX approved this setting is recommended.
If you have Meridian DSP loudspeakers they cannot be set
above +0db.
Note that you cannot set the level of a subwoofer by ear,
because low-frequency noises sound quieter. To set the
subwoofer correctly either use an SPL meter, or set it by ear and
then reduce the subwoofer gain by 15dB to correct for human
hearing.
● When you have completed the Levels section press > or
Store to proceed to the next test.
Calibration tests