Connections
7
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.
7 : 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.
Chapter 6 : 3.AC
mains supply
). Never disconnect the ground pin on the AC
mains power cord.
7 : 2.Analog input
Analog input is provided by means of two Neutrik XLR
connectors in K2 and K3 or a couple of XLR/jack hybrid
combo connectors in K6, K8, K10 and K20 amplifiers. Signal
polarity for XLR and TRS plugs is shown in
FIGURE 8
.
7 : 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.
7 : 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.
FIGURE 8: Signal polarity in balanced connections;
A) XLR-M plug; B) TRS jack; C) XLR-F plug.
Analog input
XLR-M pinout
Pin 1
GND
Pin 2
HOT
Pin 3
COLD
Analog input
TRS Jack pinout
Tip
HOT
Ring
COLD
Sleeve
GND
A
C
B
HOT
HOT
1
S
2
R
3
T
COLD
COLD
GND
GND
Analog line output
XLR-F pinout
Pin 1
GND
Pin 2
HOT
Pin 3
COLD
HOT
1
2
3
COLD
GND
FIGURE 9: Analog input in K2, K3 (top)
and K6, K8, K10, K20 (bottom).
FIGURE 11: Digital input in K2, K3 (top)
and K6, K8, K10, K20 (bottom).
FIGURE 10: Analog line output in K2, K3.
8 | K Series | User guide
