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Nº502 Media Console Customizing the Nº502
Speaker Levels
The Speaker Levels parameter allows the user to set the output level for
each individual speaker. The Speaker Levels are calibrated using the
Internal Noise Test or the External Noise Test.
Before starting a test, make the following preparations:
• obtain a Sound-Pressure Level (SPL) meter. An SPL meter is a device
that measures the relative loudness of the speakers to ensure accurate
output-level calibration.
• Calibrate the output levels from the primary listening position by
placing the SPL meter at the approximate location of the listener’s
head when seated.
• Speakers that are not active cannot be adjusted. Verify that the
appropriate speakers are activated before beginning.
Note The Nº502 sets the volume level to the Reference volume during the Internal
and External Noise tests. Avoid adjusting the master volume level while the
test is in progress.
Internal Noise Test
The Internal Noise Test sends an internal calibration noise signal to each
Main Zone audio output connector, allowing for simultaneous output
level adjustments.
To Manually Calibrate the Output Levels During the Internal Noise Test:
1. Set the SPL meter to “C” weighting and “SLOW” response.
2. Place the SPL meter in the primary listening position.
3. On the Nº502, select the Internal Noise Test from the Speaker Levels
menu. A warning message regarding high audio levels is displayed.
4. Select OK to begin the Internal Noise Test.
5. Select the Front Left Speaker in the Internal Noise Test menu. an
adjustment bar is displayed.
6. Use the and buttons to adjust the adjustment bar for the output
level until the SPL meter reads 75dB at the primary listening position.
7. Repeat Step 5 and Step 6 until all active output levels are calibrated.
8. Press the button to exit the Internal Noise Test menu.
:SpeakerLevels
Internal Noise Test
External Noise Test
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