Application Guide; Gain Structure - Lake LM Series Operation Manual

Application Guide

9. Application Guide
This chapter describes the practical application and use of LM Series devices.
9.1

Gain Structure

The LM Series architecture provides gain adjustments at various points in the signal path and therefore, vari-
ous places for muting and level adjustment. Each mute or gain adjustment point serves a different purpose.
The signal flow diagrams in chapter 5 provides a useful reference for the signal path. The following sections
describe the various adjustment points, all of which are available via the Lake Controller software.
9.1.1 Input Headroom (Analog Inputs Only)
This parameter should be set relevant to the output level of the analog audio source (e.g. mixing console).
This setting does not affect the other gain stages, or the overall noise floor; it allows control of the appropri-
ate headroom at the input stage only.
To adjust, navigate to I/O CONFIG > INPUT CONFIGURATION in the Lake Controller. Please refer to the
Lake Controller Operation Manual for further details.
9.1.2 Input Mixer
Input Mixer gains can remain at 0.00 dB for most configurations; if only one input channel is used per
Module, the other can be set to -INF.
To adjust, navigate to I/O CONFIG and tap the Input Mixer blocks for the Module in the Lake Controller.
Please refer to the Lake Controller Operation Manual for further details.
9.1.3 Module Input Gain
Input Gain is used to adjust the level between different speaker cabinets in the system. This gain can remain
at 0.00 dB unless a lower level is required for the cabinet/s driven by this Module.
To adjust, navigate to MODULES > EQ/LEVELS > LEVELS in the Lake Controller. Please refer to the
Lake Controller Operation Manual for further details.
9.1.4 Module Output Gain
Factory and User Gain are provided for each Module output. These two stages provide a level of security
and control for the system designer (Factory) and a further level of adjustment for the user (User), both of
which combine to balance the level between frequency bands in a multi-way crossover (Contour configura-
tion) or the Module output level (Mesa configuration).
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Lake LM Series Operation Manual Rev 1.3.5