6
4.3' difference in throw results in 1.32 dB less output in the nearfield
Add 1.32 dB additional downfill gain to compensate for 5' increased trimheight
Adding downfill gain to compensate for additional trim height
26.3'
30.6'
20'
25'
12'
12'
1x KF755 (inverted)
4x KF750
1x KF755
1x KF755 (inverted)
4x KF750
1x KF755
0 dB
-1.32 dB
I – Using KF750’s for Primary Coverage
As discussed in Section 1, array columns are created based on a venue’s cross-section. Naturally, the overall depth of
the venue will govern the number of KF750’s in the column with larger venues requiring more KF750’s per column.
For basic guidelines on the quantity of KF750’s required per column in specific venue types, see Section 4.
II – Using KF755’s for Downfill Coverage
When clusters are flown, most venues require downfill in order to effectively cover the front of the audience. Since
the KF755 uses an asymmetrical multi-axial design, it will provide downfill coverage from a deadhung array.
Properly integrating KF755 downfill modules with appropriate processing and AS3D techniques will provide even
coverage to the front of the venue without creating interference issues in the transition area between KF755 and
KF750 coverage.
Dedicated downfill module processor settings* allow users to integrate KF755’s into a KF750 cluster without
modifying the KF750 processing. The unconventional settings that result will make a KF755 sound tonally
unbalanced when listened to in the absence of a KF750 array above. This is entirely intentional and provides
for tonally transparent transition from downfill coverage to the primary cluster.
IIa – Adjusting KF755 System Gain and System Delay
As the user moves from venue to venue, (s)he need adjust only two critical KF755 parameters: system gain and
system delay, both of which vary with trim height and number of KF750's per column.
Default KF755 gains are set for given KF750 quantities in the standard array processing. This gain however, must be
adjusted as trim height varies. If the cluster is flown higher than the default setting’s assumptions, the KF755 gain
must be increased to compensate for increased throw and vice versa.
*
Processor settings will be released in text format as part of the Touring Usage Guide.
Содержание KF750 Series
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