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12 - SPEAKER PRESETS
SRX900 Series speakers have dedicated speaker presets created by JBL engineers to optimize the system for a given use case. These
presets are embedded in the device firmware and may be updated by JBL to further improve performance. They can be recalled and
changed independently of the user DSP and are not editable by the end user.
12.1 LINE ARRA Y MODES
SRX900 Series line arrays can be operated in one of three modes depending on the application and the number of speakers within an
array. Operating modes are designed to create a neutral starting point and alter the tonal balance of the speakers to compensate for
low frequency changes caused by array conditions. Select the most appropriate mode for the application at hand via the LCD panel or
software.
FILL: The FL presets (short for FILL) have nominally flat frequency response and are used in situations where individual SRX900 cabinets
are appropriate, such as distributed front fills. This mode is available for both the SRX906LA and SRX910LA.
SMALL ARRAY (SA): The SA preset (short for Small Array) is appropriate in situations where two or three SRX906LA cabinets are placed
on a pole on top of subwoofers. A gentle high frequency shelving response is applied to offset LF/MF array buildup for arrays of two to
three cabinets. This mode is exclusive to the SRX906LA, since the SRX910LA cannot be pole mounted.
ARRAY: This is the standard preset for array use. This preset is available for both models and should be used in all situations where four
or more speakers are used. A high frequency shelving response is applied to offset LF/MF array buildup for nominally focused arrays
(equally spaced impact points over the desired audience coverage area). This mode is compatible with the Array Size Compensation
filter, which can further shape the array buildup for longer arrays.
Low frequency options:
Each line array mode is available in two variants, full-range or 80 Hz. In full-range mode, the acoustical low frequency response of the
system extends as low as possible and should be used when the system is operated without subwoofers. The 80 Hz option is used when
subwoofers are available and when the highest A-weighted sound pressure level (SPL) is required.
CAUTION: When subwoofers are available, the SRX906LA and SRX910LA speakers should always be operated in the
80 Hz mode, which produces the highest A-weighted sound pressure level (SPL) and reduces amplifier resources .
12.2 SUBWOOFER PRESETS
Low frequency options:
The SRX900 subwoofers support two modes 60 Hz or 80 Hz. When subwoofers are used together with SRX900 line arrays, 80 Hz mode
should always be selected.
Orientation: Forward or Rear
By default, a subwoofer is set as Forward for normal operation. In properly configured subwoofer arrays, a subwoofer's physical ori-
entation can be changed, which with proper DSP settings, will improve rejection behind the subwoofer array and improve the forward
response. The Rear setting will automatically recall the proper DSP settings to optimize the subwoofer for this configuration, which is
often referred to as a "cardioid subwoofer array". See Section 14 - Subwoofer Orientation for additional information regarding forward
and rear-facing subwoofers and how to deploy a cardioid subwoofer array.
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User Manual
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