䉴
VT4887A Compact Bi-Amplified Three-Way High Directivity Line Array Element
VT4887A Acoustical Measurements
The frequency response measurement shows composite
response. The Vertical Beamwidth results range from a single box
up to an 8-box array with 10° splay angles between adjacent
array elements.
All measurements provided herewith are derived from data
gathered with a calibrated measurement microphone centered
on-axis of the box or array, with polar data points taken
symmetrically around the measurement axis.
All polars were taken as groundplane measurements at a
distance of 10 meters, with data gathered on 5-degree intervals
from 0-355° using the MLSSA measurement system.
(95˚)
281
(11.0)
(17.2)
437
207
(8.14)
Dimensions in mm (in.)
(29.0)
736.6
(31.0)
787
(29.0)
736.6
(16.4)
415
System Dimensions (WxHxD):
787 mm x 281 mm x 415 mm including attached
suspension hardware
Vertical Beamwidth, Single Line Array Element
20
100
1000
10000
20000
Frequency (Hz)
80
90
100
110
120
SPL (dB)
Frequency Response, On-Axis, Single Line Array Element
Vertical Beamwidth, Four Element Array
(10° splay between cabinets)
Vertical Beamwidth, Six Element Array
(10° splay between cabinets)
Vertical Beamwidth, Eight Element Array
(10° splay between cabinets)
Vertical Beamwidth,Two Element Array
(10° splay between cabinets)
74665_JBL_VT4887A 5/23/07 10:30 AM Page 2