Lexicon manual Configuring the MC-12for V4 EQ, About Automatic Calibration

Version 4 EQ User Guide Configuring the MC-12 for V4 EQ

ABOUT AUTOMATIC CALIBRATION

When running the V4 EQ software, the MC-12 offers automatic calibration of the listening room’s bass response, loudspeaker distances, and loudspeaker output levels. A successful microphone check is required before automatic calibration procedures can be performed.

The Automatic Calibration Procedures table on the next page describes all automatic calibration procedures.

BEFORE performing automatic calibration:

✓Use the CUSTOM or THX SETUP menu to set crossover points for the loudspeakers connected to the Main Zone audio output connectors. Setting crossover points, after automatic calibra- tion is performed, can invalidate calibrated output levels.

✓Set all associated component (e.g., subwoofers, loudspeakers, and power amplifiers) volume controls to a reasonable level. During automatic calibration, the MC-12 outputs calibration noise signals at fixed volume levels. However, when automatic calibration ends, the MC-12 automatically reverts to the last volume level that was selected before automatic calibration was performed.

✓Eliminate extraneous noises in the listening room, including conversations, air conditioners, and sounds that filter in through open doors and windows.

✓Remove objects, including people, blocking the line-of-sight path between the microphones and the loudspeakers.

DURING automatic calibration:

✓Calibrate the listening room’s bass response BEFORE calibrating loudspeaker output levels. Room correction applied to the loudspeakers as a result of the EQ DISTANCES LEVELS or ROOM EQ procedure can affect loudspeaker output levels, particularly those of the subwoofer and low frequency effect (LFE) subwoofer.

✓The MC-12 outputs calibration noise signals between 55 and 95dB, starting at 55dB and increasing in 5dB increments until the microphones detect the required level. If calibration noise

signals become too loud, press the	arrow button to cancel
automatic calibration.

✓Refer to the on-screen display rather than the front panel display. The on-screen display provides additional information and instructions.

2-3