JBL SRX900 Series, User Manual

Page: 26 / 51

User Manual
26
13 - ARRAY CALIBRATION
SRX900 Series full-range speakers have two dedicated, user-adjustable filters designed to quickly tailor the tonal response of an array.
Each filter serves a specific intended purpose to accelerate the tuning process. Both filters can be applied quickly to all elements in an
array from JBL Performance software, or to array elements one at a time from the LCD on the rear of the cabinets. For more information
on applying Array Calibration filters from the LCD, see
Section 15 - LCD, and for information on applying calibration filters from Perfor-
mance control software see the Performance User Guide available at www .jblpro .com
13.1 FILTER 1- ARRAY SIZE COMPENSATION (ASC)
The Array Size Compensation (ASC) filter is designed to work in conjunction with the array presets and it can be used to reduce the en-
ergy created by the coupling effects of arrays in the mid and low frequencies, and bring the array closer to the desired tonal response. LF
adjustments should be applied equally to all cabinets within the array. ASC values can depend on the shape of the array, the acoustics
of a room, or preference. Adjust ASC up or down to achieve the desired tonal result.
13.2 FILTER 2 - THROW DISTANCE COMPENSATION (TDC)
The Throw Distance Compensation (TDC) filter provides a linear phase, EQ and per-cabinet gain adjustment to optimize each array
element for the air absorption effects of distance. TDC is typically applied on a per-cabinet basis, depending on the desired outcome,
with the cabinets throwing further distances typically needing an HF boost, and cabinets throwing short distances needing HF reduction.
Throw Distance Compensation
20 100 1000 10000 20000
Frequency (Hz)
-20
-10
0
10
20
20 100 1000 10000 20000
Frequency (Hz)
-20
-10
0
10
20
Proximity Correction
20 100 1000 10000 20000
Frequency (Hz)
-20
-10
0
10
20
Array Size Compensation