Technical Specifications:
The Electro-Voice
®
Xi-1183A/64F is a full-bandwidth, three-
way, triamp system is designed for medium- to long-throw
applications. The orientation of LF section and the mid-
bass horn create a two-element line array that extends
vertical pattern control to below 350 Hz. Using VBS (Vertical
Beam Shaping) technology this benefit can be increased
by another 20° to 40° of pattern control above 300 Hz. VBS
uses filters to overlap the LF section bandpass with mid-
bass bandpass. By carefully phase matching the acoustic
response in the overlap region the vertical pattern control is
dramatically improved as seen in the graphs on Page 2.
Frequency response on-axis is unaffected, while gain
before feedback is increased by 10 to 15 dB for microphones
located under the loudspeaker. Its high-frequency horn/driver
section is rotatable to provide proper coverage for vertical
or horizontal system installations. The low-frequency section
is powered by an 18-inch driver (EVX-180B) in a slot-loaded,
closed box configuration suitable for moderately high sound
pressure levels. When very high levels are desired we
suggest augmenting with the Xi-1191A. For maximum low-
frequency performance, combine in a four-way configuration.
The ND12A 12-inch, application-specific mid-bass driver
features RMD™ and a 60° x 40° horn. The ND6-16 high-
frequency driver/horn combination is fully “shrouded” to
preserve midbass wave-front detail.
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General Description:
Xi-1183A/64F
18-Inch Three-Way,
Full-Range 60° x 40°
Sound Reinforcement System
Key Features:
•
High-Level, Three-Way Design
•
VBS Capable
•
EVX-180B 18” Slot-Loaded Low-Frequency
Driver
•
ND12A 12” Neodymium Mid-Bass Driver
(60° x 40° Coverage)
•
Coaxially-Mounted ND6-16 3” Diaphragm HF
Compression Driver
•
Fully Rotatable HF Section for Vertical or
Horizontal Suspension
•
Ring-Mode Decoupling / RMD
TM
•
Built-In L-Track Rigging
•
Available in Black or White
•
Dimensions Identical to Xi-1191 and Xi-2181
Subwoofers, Footprint Identical to Xi-2153
1
Full Space measurement with a Dx38 Controller
2
Max Calculated SPL of MB Section
3
Download at www.electrovoice.com
