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Customizing the Nº502 Mark Levinson
• Out of Range – the microphone level is more than 20dB below
the highest microphone level.
• Too Much Room Noise – the microphone level could not be
determined because of excessive room noise.
If the calibration reports any of these errors, refer to the “Automatic
Calibration Errors” section of Chapter 4: Troubleshooting & Maintenance
for troubleshooting information.
10. If the Check Microphones test passed, leave the microphones
connected and continue to Step 11.
If the Check Microphones test failed, then:
D check the microphones and microphone cables for proper
connection or possible damage.
D remove or disable any possible external noise sources.
D press the button to return to the Automatic Calibration menu.
D return to Step 6 to perform the Check Microphones test again.
Continue to make adjustments and rerun the test until the test results
indicate that at least two microphones have passed the test. If you
have problems reaching this state, contact an authorized Mark
Levinson dealer for assistance.
Run Calibration
11. Select Run Automatic Calibration and press Enter.
If the Run Calibration option is not available for selection, then the
Check Microphones test has not passed. Return to Step 6 to perform
the test again.
12. Place the four microphones in the listening space as instructed on the
display. Both initial instructions and status information are displayed
as the calibration proceeds.
Pay particular attention to ensure that the microphones are properly
placed. The microphone placement determines whether the Nº502
calibrates optimal Room Correction, speaker distances, and output
levels for a single listening position, several listening positions in a
single row, or several listening positions in the listening space.
Refer to the following examples to position the microphones for
calibration. Select the microphone placement option that best meets
the needs of the listening space.
For a single listening position, place the microphones:
D as close together as possible in the primary listening position.
D at the approximate position of the listener’s head.
D in a clear line-of-sight path with all of the speakers.
D in a location unobstructed by furniture and other fixtures, where
echoes will not obscure calibration noise signals.
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