KV2 Audio EX26 - Manual (Page 8)

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Chapter 2: Audio Signal
The EX26 Control Panel
The EX26 features an easy to use control panel
featuring AC power in, audio input and
through output, level control, LED status light
and a High Pass filter.
Audio Input and Output
The EX26 uses a balanced, female XLR
connector for the audio input connector, and
a male XLR connector to provide through
output signal. The through output connector,
wired in parallel to the audio input, will
continue to provide the input signal if the
EX26 is turned off. The audio input circuit
presents a 20 kΩ balanced input impedance to
a three-pin XLR connector with the following
connections:
Pin1 -1 kΩ to chassis and earth ground
Pin 2 -Signal (+)
Pin 3 -Signal (-)
Case -Earth (AC) ground and chassis
Audio signal can be daisy-chained using the
through output connector on the input panel.
A single source can drive multiple EX26 speak-
ers with a paralleled input loop. If you are
driving multiple EX26’s make certain that the
source device can drive the total load imped-
ance presented by the paralleled input circuits.
The audio source must be capable of produc-
ing a minimum of 1.0V volts rms to produce
the maximum peak SPL over the operating
bandwidth of the loudspeaker.
To avoid distortion from the source, make sure
the source equipment provides an adequate
drive circuit design for the total paralleled load
impedance presented by the speakers. The
input impedance for a single loudspeaker is
20 kΩ. If “n” represents the number of EX26
loudspeakers in a system, paralleling the inputs
of n loudspeakers will produce a balanced input
load of 20 kΩ divided by “n”.
TIP: If the loudspeaker produces
noises such as hiss and popping,
disconnect the audio cable from the
loudspeaker, if the noise stops, then most
likely the problem is not with the loudspeaker.
Check the audio cable, source, and AC power
for the source of the problem.
TIP