Power Connector Wiring; Connections; Amplification & Protection Circuitry - K-array OVERBASS Ko70 User Manual

5. POWER CONNECTOR WIRING CONVENTIONS
The Ko70 requires a grounded outlet. It is very important that the system be properly grounded for both safety and proper operation.
Use the following wiring diagram to create power cables and distribution systems.

6. CONNECTIONS

The Ko70 presents two 10k ohm balanced inputs impedance to three-pin XLR connectors with the following connections:
pin1 = Ground
pin2 = Signal +
pin3 = Signal -
Pins 2 and 3 carry the input as a differential signal; pin 2 is hot relative to pin 3, resulting in a positive pressure wave when a positive
signal is applied to pin 2. Use standard audio cables with XLR connectors for balanced signal sources. Make sure that pin 1 (shield)
is always connected on both ends of the cable.
If abnormal noises such as hiss and popping are produced by the loudspeaker, disconnect
speaker. 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.
Audio signals can be easily-chained using the loop output connector on the user panel of the Ko70. A single source can drive
multiple Ko70 with a paralleled input loop, creating an unbuffered hard-wired loop connection. When driving multiple
array, make certain that the source device can drive the total load impedance presented by the paralleled input circuit of the array.
The audio source must be capable of producing a minimum of 20 dBV (10-Vrms into 600 ohms) in order to produce the maximum peak
SPL over the operating bandwidth of the loudspeaker.
7. AMPLIFICATION AND PROTECTION CIRCUITRY
The Ko70 is powered by the K-array digital power amplifier with a total power of 3000+3000 watts. All the specific functions for the
Ko70 such as crossovers, frequency, phase response, and loudspeakers protection are determined by a DSP processor installed
inside the amplifier. All K-array speakers are shipped with the cone drivers in correct alignment. However, if a loudspeaker needs to
be replaced, make sure the replacement is reinstalled with the correct polarity. Incorrect cone driver polarity impairs the system
performance and may damage the component.
USER'S MANUAL
CAUTION
!
The Ko70 require a ground connection. Always use a grounding outlet
when connecting these units.
CAUTION
!
Do not operate the unit if the power cables are frayed or broken.
CAUTION
Keep all liquids away from the Ko15 amplifiers to avoid hazards from electrical
!
shocks.
CAUTION
!
Shorting an input connector pin to the case can form a ground loop
and cause hum.
the audio cable from the
Ko30 in an
P. 5