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Four 10-in LF cones, sealed, phase-aligned; dual 8-in MF cones, horn-loaded; dual 1.4-in exit HF compression drivers, horn-loaded.

KF740 3-Way Line Array Module

PRODUCT INFORMATION

The KF740 line array system is optimized for the widest possible range of touring and installation applications. With output capabilities resembling the much larger KF760 and a footprint and weight similar to the diminutive KF730, the KF740 is the ideal solution for a wide variety of applications including touring sound, corporate A/V, sports arenas, houses of worship, performing arts centers, hotel ballrooms and live clubs.

The KF740 delivers the premium, high output, 3-way performance that is the hallmark of the KF Series in an extremely compact and easy-to-use package. Dual 62mm voice coil HF compression drivers and dual 8-in Concentric Summation Array (CSA) loaded MF transducers are integrated through a common horn that occupies the entire face of the enclosure. The astounding pattern control offered by this configuration is extended even further (down to 160 Hz) as the MF devices are transitioned to a spaced array of four 2.5-in voice coil 10-in woofers. The pair of LF devices integrated within the MF/HF horn combined with the pair of side-mounted devices provides as much as 18 dB of off-axis rejection. The EAW Focused processing delivered via the UX8800 DSP precisely transitions from one system subsection to another while maintaining nearly perfect 90 degree control.

A full KF740 array provides seamless coverage from directly below the array to hundreds of feet in front. The vertical output can be tailored to match the requirements of any space by varying the splay at the rear of the enclosures as directed by EAW Resolution software. The resultant configuration repeatedly produces a continuous, coherent wave front of extended range, high resolution audio over the entire defined coverage area. Broadly applicable line sources can be constructed solely of KF740 modules. The versatile KF740 can also be integrated above KF730 modules or beneath KF760 modules to extend the reach of the range to any application imaginable.

The impressive low frequency output and extension of the KF740 can be even further enhanced by the use of the complementary SB1002 flying subwoofer. The truck-pack friendly KF740 is assembled in the USA with unrivaled construction details including: cabinet grade exterior Baltic birch plywood enclosure; wear resistant textured coating; powder-coated steel grille; extruded structural aluminum rigging; precision quick release rigging pins; Neutrik NL8 connectors; heavy duty bar handles; cast aluminum side handholds; and accessory caster pallets, flybars and adapter bars (the AB7674-73 attaches the KF740 or KF730 to the KF760, the AB7473 attaches the KF730 to the KF740).

  • High output to size/weight ratio. Size and output capabilities allow it to be used in the widest variety of venues.
  • Exceptional pattern control due to symmetrical design, large horn(s) and spaced woofers.
  • Incorporates latest EAW technologies including CSA and Focusing for improved mid and high frequency transient response.
  • Fully compatible with KF760 and KF730 systems.

CONFIGURATION

Subsystem:

Transducer: LF – 4x 10 in cone; MF – 2x 8 in. cone; HF – 2x 1.4 in. exit, 2.5 in. voice coil compression driver

Loading: LF – Sealed, Phase Aligned™; MF – Horn-loaded w/CSA™ Aperture; HF – Horn-loaded

Operating Mode:

Amplifier Channels: Tri-amp LF, MF, HF

External Signal Processing: DSP w/3-way filters

PERFORMANCE

Operating Range (-10 dB, Hz)

50 – 20k

Axial Sensitivity (dB SPL)

LF: 93

MF: 107

HF: 110

Power Handling / Impedance (Watts @ Ohms)

LF: 700 @ 8 (2x)

MF: 625 @ 8

HF: 200 @ 8

Calc. Max. Out Peak (dB SPL)

LF: 130

MF: 141

HF: 139

Calc. Max. Out Long Term (dB SPL)

LF: 124

MF: 135

HF: 133

Nominal Coverage (degrees)

Horizontal: 90

Vertical: 12

Subsystems

LF: 4x 10-in cone, sealed, phase aligned

MF: 2x 8-in cone, horn-loaded

HF: 2x 1.4-in exit compression driver, horn-loaded

ORDERING DATA

Versions

KF740P Black 2034762

KF740P White 2034869

KF740P-WP Black 2034763

KF740 Black 0033033

Accessories Part Number
KF740 flybar, FB174
0033126
KF740 pallet, PLT74K
0033466
KF740/KF730 to KF760 adapter bar, AB7674-73
2034117
KF740 to KF730 adapter bar, AB7473
0032870
KF740P Flybar, FB174P
2036533
KF740 Fly Bar Ground Stack Kit, ACC-GS276
0026787
KF740 Spare Pin, QRP2
0020558-02
Zero Degree Adapter, ACC-0DEGKF
2039328
KF740 zero degree adapter use

Dimensions (inches/millimeters)

Height (front): 13.00/330.2

Height (rear): 9.58/243.4

Width: 40.10/1018.5

Depth: 17.56/446.0

Trap. Angle (degrees, top and bottom): 6

Weights (pounds/kilogram)

Net (approx.): 107/48.6

Shipping (approx.): 120/54.4