Manual
EX1.2 USER GUIDE P. 7
REAR CONTROL PANEL
The EX1.2 features an easy to use rear control panel
featuring audio input and output connections, level
control, LED status lights and a phase switch, that
changes the phase of the high pass audio output
signal. This serves as a tool for integrating the full
range cabinet and the subwoofer into challenging
audio environments.
Audio Input and Output
The EX1.2 uses balanced, female XLR connectors for
audio signal input, and a male XLR connector to
provide through output signal. The EX1.2 features
Left and Right stereo inputs and outputs allowing the
product to be integrated into stereo systems that
require one subwoofer.
The EX1.2 also features Left and Right High Pass
Outputs that can be used to provide audio signal to
full range speakers being used in conjunction with
the EX1.2. The high pass lter provides a crossover
point of 125Hz.
The through output connector, wired in parallel to
the audio input, will continue to provide the input
signal if the EX1.2 is turned o. The audio input circuit
presents a 20 kOhm balanced input impedance to a
three-pin XLR connector with the following connec-
tors:
Pin 1 - 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 EX1.2 subwoofers with a paralleled
input loop. If you are driving multiple EX1.2’s in an
array, make certain that the source device can drive
the total load impedance presented by the paralleled
input circuit of the array.
EX1.2 CONTROL PANEL
NOTE: Most source equipment is safe for
driving loads no smaller than 10 times the
source’s output impedance. For example,
cascading an array of 10 units consisting of
EX1.2 subwoofers produces an input imped-
ance of 2000 ohms (20kOhms divided by 10).
The source equipment should have output
impedance of 200 ohms or less. This is also
true when connecting EX1.2’s in parallel (loop
out) with other KV2 Audio ampliers, active
speakers and subwoofers.
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.
NOTE: Ensure that all cabling carrying signal
to multiple ampliers and active speaker
systems is wired correctly. Make sure that the
polarity has not been reversed. Reversed
polarity can cause severe degradation in
frequency response and can also impact the
dispersion characteristics of the speaker.
EX1.2 Rear panel
Through outputMain input