Lexicon MC-1 owner manual Subwoofer Peak Limiter

MC-1 Digital Controller

System Configuration

Note that the Volume control is active when utilizing external noise calibration.

a Dolby Digital AC-3 signal is coming in, the MC-1 will load the DOLBY DIGITAL effect with the factory preset settings. If a DTS signal is coming in, the MC-1 will load the DTS FILM effect with the factory preset settings.

Subwoofer Peak Limiter

Note that +00dB=85dB, and +15dB=100dB in a properly calibrated system.

Note that the Sub Peak Limiter is sepa- rate from the Subwoofer level control in the Effect Adjust menus — one setting does not affect the other.

Dolby Digital (AC-3) and DTS encoded sources can produce low frequency peaks that are much louder than those in matrixed Dolby Surround decoding. These higher levels may be troublesome in the home listening environment, either because they disturb non-listeners in nearby rooms, or because of the inability of the subwoofer and its associated amplifier to reproduce these levels without clipping.

	SUB PEAK LIMITER		Adjust with ▲ or ▼
LIMITER		ON
			ON, OFF
LIMITER ADJUST		+15dB	-5dB to +35dB
	!WARNING!
REDUCE SYSTEM VOLUME
	BEFORE TURNING
	LIMITER OFF

The MC-1 provides a Subwoofer Peak Limiter that prevents the subwoofer signal level from exceeding a preset value. The limit is factory preset to a level of +15dB. This setting can be changed within the limiter’s operating range of -5dB to +35dB, with -5dB providing maximum limiting.

To turn off the limiter or to change its setting, select the SUB PK LIMITER parameter in the Output Levels menu.

If you want to turn the limiter off, first turn the system volume down in order to prevent the subwoofer from overloading.

Press ▼ to select LIMITER, then press SELECT. Press ▼ to select OFF. Press DONE twice to return to the Output Levels menu. While readjusting the system volume back to a comfortable listening level, check to be sure the subwoofer or its amplifier is not overloading on passages with loud low frequency peaks.

Selecting LIMITER ADJUST in the Sub Peak Limiter menu invokes a calibration routine for setting the optimal peak level for your installation. Pressing SELECT routes low frequency calibration noise to the subwoofer output of the MC-1. A two-line display indicates the LIMITER LEVEL setting in dB on the top line with a bar at the bottom to indicate relative noise level. Press ▲ and ▼ to adjust the noise level to the highest level that your equipment can reproduce without overload.

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