Lexicon MC-12 manual Positioning the Microphones for Automatic Calibration

MC-12 Setup

Message	Description		Troubleshooting
	The microphone detected the calibration	•	N/A
(MICROPHONE)
OK	noise signal without error.
	The MC-12 did not detect the micro-	•	Examine microphone input connections to ensure that the microphones are properly con-
(MICROPHONE)
NOT DETECTED	phone during the silence check.		nected to the MC-12 and that microphone cable plugs are fully inserted for a solid connection.
		•	The microphone might be damaged. Contact an authorized Lexicon dealer for assistance.
	The MC-12 detected the microphone	•	Examine microphone input connections to ensure that the microphones are properly con-
(MICROPHONE)
SIGNAL TOO LOW	during the silence check. However, the		nected to the MC-12 and that microphone cable plugs are fully inserted for a solid connection.
	microphone level determined during the	•	The microphones might be positioned too far from the front speakers. Refer to the microphone
	silence check was not confirmed during		placement examples that begin on page 3-42to confirm that the microphones are appropri-
	the microphone check.		ately positioned for the microphone check.
		•	The microphone might be damaged. Contact an authorized Lexicon dealer for assistance.
	The microphone level is more than 20dB	•	Examine microphone input connections to ensure that the microphones are properly con-
(MICROPHONE)
OUT OF RANGE	below the highest microphone level.		nected to the MC-12 and that microphone cable plugs are fully inserted for a solid connection.
		•	The microphones might be positioned too far from the front speakers. Refer to the microphone
			placement examples that begin on page 3-42to confirm that the microphones are appropri-
			ately positioned for the microphone check.
		•	The microphone might be damaged. Contact an authorized Lexicon dealer for assistance.
	The microphone level could not be deter-	•	Eliminate extraneous noises in the listening space, including conversations, air conditioners,
(MICROPHONE)
TOO MUCH ROOM NOISE	mined because of excessive room noise in		and sounds that filter in through open doors and windows.
	the listening space.	•	The microphone might be damaged. Contact an authorized Lexicon dealer for assistance.

POSITIONING THE MICROPHONES FOR AUTOMATIC CALIBRATION

Proper microphone placement is essential to achieving the desired automatic calibration results. Microphone placement determines whether the MC-12 calibrates optimal 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 microphone placement examples that begin on the next page to position the microphones for automatic calibration. Select the microphone placement that best meets the needs of the listening space.

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