Lexicon DC-1 - ADDENDUM Owner's Manual Addendum page 46

DC-1Effects
DC-1 Digital Controller
SURROUND LEVEL controls the volume level of the side and rear speakers.
Although we have selected a default value, the correct setting will vary with
each recording, the room, and your personal taste.
LFE MIX LEVEL allows separate level attenuation of the LFE channel,
which is ultimately mixed to the subwoofer output. As the bass from as
many as five other channels is added to the LFE, it can significantly raise
subwoofer output levels — and create the risk of damage to a system.
Careful adjustment of this parameter will allow you to achieve proper tonal
balance and reduce the risk of damage.
SUBWOOFER LVL boosts or cuts the subwoofer output level. Although the
normal subwoofer level is set during the calibration procedure, with some
recordings it may be desirable to increase or decrease this deep bass level.
EFFECT LEVEL adjusts the loudness of the side and rear speakers.
35