EAW KF730 & SB730 PRELIMINARY OWNER’S MANUAL Page 5 of 16
4.3 GROUND STACKING
Normally, a ground-stacked KF730 main array is used where suspension is not possible, too difficult, or too
time consuming. Additional uses are as stage side fills and audience front fill.
Both KF730s and SB730s may be ground-stacked alone or in combination. In combination, always stack
the KF730s on top of the SB730s. The recommended minimum and maximum array quantities are:
Array Min Max
KF730 alone 2 6
SB730 alone 1 4
KF730 / SB730 2/1 4 / 2
4.4 SUBWOOFERS
4.4.1 General Considerations
Although the impressive low frequency performance of KF730 Series arrays allows them to be used without
subwoofers for some events, subwoofers will normally be used for live musical performances. The
recommended subwoofers are EAW’s SB730, specifically designed to complement KF730 line arrays.
NOTE: Bass performance is often highly program or venue-dependent, as well as subjective as to quantity
and quality. For this reason the type, quantity, and disposition of subwoofers may vary considerably with
the application. The quantity recommendations below are for general purposes, providing a balanced
system for most music applications. Quantities may need to be adjusted up or down for specific situations.
4.4.2 SB730 Subwoofers
SB730 subwoofers are designed to complement the KF730 loudspeakers to both extend the low frequency
response and provide more output for the upper low frequencies. The SB730 subwoofers may either be
ground stacked, flown as part of a KF730 array, or flown separately alongside a KF730 array.
A general recommendation is to use KF730s and SB730s in a ratio of 3 KF730s to 2 SB730s.
4.4.3 Suspending SB730 Subwoofers
The SB730 enclosure rigging is designed to directly couple to a KF730 Fly-Bar and KF730 enclosures. As
such, the SB730 can be rigged seamlessly with KF730s.
When flown as part of a KF730 array, the SB730s should be the uppermost enclosures in the array. In this
application, the SB730s are suspended flat-fronted, with the KF730s suspended below in their curved line.
When flown separately, SB730s should be flown so that the spacing between the line of SB730 enclosures
and KF730 enclosures is about 1 ft / 0.3 m. The SB730 should be suspended in a flat-fronted configuration.
4.4.4 Other Subwoofers
Other subwoofers, such as the EAW’s SBX220, SB1000zRi, or BH760, can also be used with KF730s. For
Recommended quantities of KF730 for each subwoofer are:
Model Subwoofer KF730
SBX220 2 3
BH760 1 4
SB100zRi 1 2
4.4.5 Signal Delay on Subwoofers
If SB730 or other subwoofers are used with KF730s, it will usually be necessary to apply overall signal
delay to the either the processor’s subwoofer outputs or KF730 outputs in order to synchronize the outputs
of the subwoofers with the KF730s.
