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TLX LIVERPOOL SERIES
LAKE Preset Overlays and Application Notes
TLX Series preset modules for LAKE LM series controllers and LAB GRUPPEN / LAKE DSP amplifi ers (PLM+, D Series L) include preset overlays to assist with system
tuning and optimisation. Four preset overlays are available: 1) Array Size Compensation; 2) Band Level EQ (BLEQ); 3) Long Throw (LT); 4) Extra Long Throw (XLT). Note:
bypassing both LT and XLT overlays provides Short Throw (ST) mode.
OVERLAY DESCRIPTION
Long Throw Mode is intended for medium- to long-throw applications and
is suitable for small to medium sized arrays consisting of 4-8 TLX43 or TLX84
enclosures. The 6 dB low-frequency shelving characteristic off sets LF/MF array
coupling and high-frequency shelving pre-emphasis compensates for air
absorption over typical throw distances for nominally focused arrays with equal
site angle impact spacing over the desired audience coverage area. Additional
equalization above 16 kHz optimizes system gain structure while maximizing
overall A-weighted SPL output.
Extra Long Throw Mode is intended for medium-, long-, or extra-throw
applications and is suitable for medium to large sized arrays consisting of more
than 8 TLX43 or TLX84 enclosures. The 6 dB low-frequency shelving off sets LF/
MF array coupling and high-frequency shelving pre-emphasis compensates for air
absorption over typical throw distances for nominally focused arrays with equal
site angle impact spacing over the desired audience coverage area. Additional HF
shelving equalization above 16 kHz optimizes high frequency extension.
Short Throw Mode has nominally-fl at low and high frequency response and
is suitable for smaller arrays consisting of 1-3 TLX43 or TLX84 enclosures. Short
throw applications include: distributed front fi ll, stacked side fi ll for stage
monitoring or stacked theatre / club systems intended for short throw front-of-
house sound reinforcement.
OVERLAY
ARRAY SIZE COMPENSATION
The array size compensation overlay provides a convenient control to compensate
for the LF versus MH tonal balance off set that occurs for larger arrays. Lowering
the MESA fi lter compensates for low-mid buildup in the 100-300 Hz region and
the Low Shelf fi lter can be used to achieve the overall desired LF versus MH tonal
balance characteristic.
BAND LEVEL EQ (BLEQ)
The Band Level EQ overlay can be used for circuit level gain shading and tapering
adjustments. Band level shading adjustment is recommended as opposed to LF,
MF, HF output channel gain shading in order to preserve proper summation and
power response between adjacent bands.
Note: It is not recommended to mix ST, LT and XLT modes within the same array
(for example, ST mode on lower circuits, LT mode on middle circuits and XLT
on upper circuits of the array). For more precise control of SPL distribution and
frequency response throughout the intended array coverage region, all array
circuits should be operated in ST, LT or XLT mode and circuit-level gain shading
and tapering adjustments implemented using the Band Level EQ Overlay.
For short-to-medium throw applications, use ST presets for all array circuits and
apply HF shelving boost to upper circuits.
For medium-to-long throw applications, use LT or XLT mode for all array circuits
and apply HF shelving reduction to lower circuits.
Quick Start Guide
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