4.1.5
VA
4
DEFINED
The system overview illustrates that the KF700 Series development was driven by enhancing
the acoustical performance of the loudspeaker systems as it relates to its arrayability. Each
loudspeaker must therefore array effectively both horizontally and vertically. Consistent
controlled coverage patterns in three dimensions guarantees predictable array results
from venue to venue.
The development goals also dictated that the KF700 Series improve upon the time
domain behavior, particularly in the vocal region. The ability of a loudspeaker to maintain
the temporal integrity of the original input signal is easily as important as the frequency
response in determining the quality of the sound reproduction. Therefore, if harmonics
lead or lag fundamentals in the reproduction, then the original signal, and perhaps even
the intent of the performer, will be distorted. The ability to maintain the input signal’s
temporal integrity while delivering smooth frequency response to a well-defined coverage
area is ultimately the goal of any loudspeaker.
Consistently achieving the desired coverage from a loudspeaker array for a given venue
is governed by performance in the three dimensions of space. Maintaining temporal
coherence is governed by the fourth dimension of time. Meeting all of these criteria truly
addresses system performance in four dimensions. This four-dimensional design
approach is VA
4
technology.
4.1.6
WEATHER-PROTECTED (WP MODELS)
The KF700P-WP and SB750P-WP models are weather-protected for permanent
installations. The exterior of the enclosure is laminated with a water-resistant fiberglass
coating. A 2-layer grille is used to prevent water from entering the front of the enclosure.
The outside layer is powder-coated perforated steel for physical protection. The rear layer
is a 1/8 inch thick foam to break up driven water droplets. Behind the grille assembly, a
layer of 100 x 100 wires per inch stainless steel mesh is affixed to the enclosure to prevent
any water spray from entering the front of the enclosure. The input panel and back
doghouse are weather-sealed with rubber strips to prevent water intrusion.
Section 5
Operation
5.1 KF700
Series
Products
5.1.1
KF700 MODELS
Model Name
Description
Primary Application
KF750F Three-way
Concert
touring
KF750P
Three-way
Permanent installation
KF750P-WP
Three-way
Outdoor installation
KF755F
Three-way
Concert touring downfill
KF755P
Three-way
Permanent installation downfill
KF755P-WP
Three-way
Outdoor installation downfill
SB750F
Dual 18-in.
Concert touring subwoofer
5.1.2
KF700 SERIES PRODUCT WEIGHTS
System
Net (lb / kg)
Shipping (lb / kg)
KF750F
198 / 90.0
230 / 104.6
KF750P
187 / 85.0
201 / 91.4
KF750P-WP
205 / 93.2
221 / 100.5
KF755F
198 / 90.0
232 / 105.5
KF755P
180 / 81.8
203 / 92.3
KF755P-WP
205 / 93.2
223 / 101.4
SB750F
193 / 87.7
202 / 91.8
KF750
KF755
2
