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3 : 5.Precautions regarding installation
WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK
f This device must be powered exclusively by earth con-
f
nected mains sockets in electrical networks compliant
to the iEc 364 or similar rules.
f install k6, k8, k10 and k20 into rack cabinet.
f
f With k6, k8, k10 and k20 a sectioning breaker be-
f
tween the mains connections and the amplifier must
be installed inside the rack cabinet. Suggested device
is 32a/250Vac, c or D curve, 10ka.
f With k2 and k3 provide a sectioning breaker between
f
the mains connections and the amplifier. Suggested
device is 16a/250Vac, c or D curve, 10ka.
f Before powering this amplifier, verify that the correct
f
voltage rating is being used.
f Verify that your mains connection is capable of satisfy-
f
ing the power ratings of the device.
f Do not use this amplifier if the electrical power cord is
f
frayed or broken.
f Output terminals are hazardous: wiring connection to
f
these terminals require installation by an instructed
person and the use of ready-made leads.
f Take care to lock the output terminal before switching
f
the device on.
f To avoid electrical shock, do not touch any exposed
f
speaker wiring while the amplifier is operating.
f Do not spill water or other liquids into or on the amplifier.
f
f No naked flame sources such as lighted candles
f
should be placed on the amplifier.
f Do not remove the cover. Failing to do so will expose
f
you to potentially dangerous voltage.
f The manufacturer cannot be held responsible for
f
damages caused to persons, things or data due to an
improper or missing ground connection.
f contact the authorized service center for ordinary and
f
extraordinary maintenance.
It is absolutely necessary to verify these fundamental
requirement of safety and, in case of doubt, require
an accurate check by qualified personnel.
Connections
Make sure the power switch is off before attempting to
make any input or output connections.
By using good quality input and speaker cables, the like-
lihood of erratic signal behavior is reduced to a minimum.
Whether you make them or buy them, look for good quality
wires, connectors and soldering techniques.
4 : 1.Signal grounding
There is no ground switch or terminal on the k Series
amplifiers. all shield terminals of input connections are di-
rectly connected to the chassis. This means that the unit's
signal grounding system is automatic. in order to limit hum
and/or interference entering the signal path, use balanced
input connections.
in the interests of safety, the unit MuST always operate
with electrical safety earth connected to the chassis via
the dedicated wire in the 3-wire cable (ref.
supply). Never disconnect the ground pin on the ac mains
power cord.
4 : 2.Analog audio input connections
analog input is provided by means of Neutrik XLr female
connectors (k2, k3), or XLr/jack hybrid combo connectors
(k6, k8, k10, k20) one per channel input. Signal polarity of
analog input connections is shown in
4 : 3.Analog line output
Line out is provided in k2 and k3 via a couple of XLr
connectors on the rear panel. in DSp equiped models, the
output signal is pre-DSp, being a replica of the input signal.
Signal polarity of line output connections is shown in
H, p.
12.
4 : 4.Digital Input
On DSp equiped models, the XLr input for channel 2
can switch to an aES3 digital input. The aES3/analog push-
button located nearby the channel 2 XLr input connector
toggles the XLr between analog and digital input.
in aES3 mode
f the channel 2 analog line out is off (k2, k3 only);
f
f the channel 1 analog input can be used as redundant
f
input if the digital input fails.
The aES3 connection carries a channel pair through a
110 Ω nominal impedance wire in the form of a balanced
(differential) digital signal: in aES3 XLr connectors the
identification of hot and cold pins is not an issue. avoid the
use of microphone cables in aES connections: impedance
mismatch can result in signal reflections and jitter, causing
bit errors at the receiver.
4
§3 : 4.ac mains
panel H, p.
12.
panel
English | 23
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