Connections; Amplification & Protection Circuitry - K-array KH4 User Manual

6. CONNECTIONS

The KH4 or KS4 presents a 10k ohm balanced input impedance to a three-pin XLR connector with the following
connectors:
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 easy-chained using the loop output connector on the user panel of the
multiple KH4 or KS4 with a paralleled input loop, creating an unbuffered hard-wired loop connection. When driving multiple
KS4 in an 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 KH4 or KS4 is powered by the K-array power amplifiers, a high-power eight-channel digital amplifiers (500 watts/ch. RMS) with a
total power of 4000 watts. All the specific functions for the
protection are determined by a DSP processor installed inside the amplifier. All K-array loudspeakers are shipped with the drivers in
correct alignment. However, if a driver needs to be replaced, make sure the replacement is reinstalled with the correct polarity.
Incorrect driver polarity impairs the system performance and may damage the drivers.
USER'S MANUAL
CAUTION
Shorting an input connector pin to the case can form a ground loop
and cause hum.
KH4 or KS4 such as crossovers, frequency, phase response, and driver
the audio cable from the
KH4 or KS4 . A single source can drive
P. 6
KH4 or