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user manual
LMS-D4
LMS-D4 user manual
Page 11
CROSSOVER SETTINGS
1) Input Gain
The input gain sets the attenuation of the signal before any processing is applied. The value
ranges from -40dB to +6dB in 0.5dB steps. In stereo mode the gain value applies to both inputs.
2) LF Bass Boost
Where implemented, the range of values are from +6.0 dB to –6.0 dB, in 0.5 dB steps. The corner
frequency is fixed and optimised for each system, and typically it is around 100Hz.
The Bass Boost control allows for an easy adjustment of the response to match variations in the
acoustic environment. Generally the 0 dB setting will provide an optimally flat response for a
single cabinet in free space.
When the cabinet is used in direct proximity of a reflecting surface (i.e. half-space conditions), the
LF level should be reduced to maintain the same balance (in theory by 3dB). Similarly when a
number of cabinets are closely coupled (e.g. in arrays) the LF control should be used to reduce the
level in the bottom end.
This control can also be used to create subjectively desired changes to the tonal balance. Please
remember to use it with care, as excessive boost could mean more stress for the drive units and
make it more critical to have the limiters accurately set.
Bass boost is not implemented in settings for speaker systems with subwoofers.
BASS BOOST
Trim = 0.0dB
INPUT GAIN
Gain = 0.0dB