Meridian Audio Digital Surround Controller G61 用户手册

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2 7

 Levels 

These tests allow you to adjust the output level to each speaker 

individually, and it follows the general guidelines from Dolby 

Laboratories and THX.

In each test the display shows the speaker being tested, and the 

current relative level. For example:

Left   Level  +0.0dB

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Press More for help

• Use 

> and < 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 the speakers are not THX 

approved this setting is recommended.

If you have Meridian DSP loudspeakers they cannot be set above 

+0dB.

Note: 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 

> to proceed 

to the next test.

 Distance

These tests allow you to adjust the delay of each of the speakers in 

the layout to time-align the system so that sounds are coincident 

when they arrive at the listening position.

Before setting up the speaker outputs you need to measure the 

distance to each speaker from the listening position:

Centre

Sub

Left

Right

Left

Side

Right

Side

Left Rear

Right Rear

Surround Sub

Measure from ear height at the listening position to the tweeter 

on each speaker (where applicable), in the distance units you have 

chosen; see 

  Calibration  tests