Connections | 9
In AES3 mode
f
f
the channel 2 analog line out is off;
f
f
the channel 1 analog input can be used as redundant
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 iden-
tification of hot and cold pins is not an issue; take care to
never tie pin 2 or pin 3 (balanced signals) to pin 1 (ground).
Avoid the use of microphone cables in AES connections:
impedance mismatch can result in signal reflections and
jitter, causing bit errors at the receiver.
7 : 5.AESOP
The AESOP standard can transport a single bidirec-
tional Fast Ethernet (IEEE 802.3u, 100 Mbit/s) control data
stream and two independent separate AES3 digital audio
monodirectional streams using one Cat5 cable.
All K Series amplifier with the optional KAESOP board
installed are equipped with at least two RJ45 connectors,
each of them being a single AESOP port, capable of send-
ing and/or receiving data and audio.
If the amplifier has only two RJ45 plugs, these will be
on the front panel. If four plugs are present, the rear two
will be “primary” ports, while the two on the front panel are
“secondary” ports.
Primary ports allow both data and AES3 streams;
secondary ports, on the other hand, are data-only ports,
allowing Ethernet connections only.
Cat5 standard twisted pair cables shall be used for con-
nections up to 100 meters (328 ft). RJ45 pinout must comply
to TIA/EIA-568-B and adopt the T568B scheme pinout, as
show in
TABLE 1
.
For more details about networking and AESOP please
refer to
Section: Network operations (p. 24)
.
RJ45 connector
seen from
the front end
1 2 3 4 5 6 7 8
Color code (TIA/EIA-568-B)
Pin
ORANGE / WHITE
1
ORANGE
2
GREEN / WHITE
3
BLUE
4
BLUE / WHITE
5
GREEN
6
BROWN / WHITE
7
BROWN
8
TABLE 1: EtherCON/RJ45 T568B scheme pinout.
7 : 6.Loudspeaker connections
K6, K8, K10, K20
K2, K3
CLASS 3 WIRING
CLASS2 WIRING
Output terminals are hazardous: wiring connection
to these terminals require installation by an
instructed person and the use of ready made leads.
Take care to secure the output terminal
before switching the device on.
Two Neutrik NL4MD speakON connectors are located
on the rear panel, each of them being a single output to
loudspeaker.
Pins 1+ and 2+ are physically bridged to the positive pole;
pins 1– and 2– are physically bridged to the negative pole.
In order to remain within safe operating conditions,
when using low impedance loads – i.e. 4 � or less (8 � or
less in bridge mode) –, connections must be made with a
four wire cable. Use suitable wire gauges to minimize power
and damping factor losses in speaker cables.
7 : 6.1. Bridge-tied load
Bridge-tied load connection can be achieved as de-
scribed in
FIGURE 12
. In analog mode, only the input of
channel 1 needs to be wired: link channel 2 to channel 1
by means of the link pushbutton located on the rear panel.
When operating with digital inputs – i.e. AES3 and
AESOP – link the channels via software: do not switch the link
pushbutton.
Bridge-tied load
speakON
connector
Channel 2
output
stage B
LINK
CHB +
CHB +
CHB –
CHB –
B
speakON
connector
Channel 1
output
stage A
CHA +
CHA +
CHA –
CHA –
A
CH1
CH2
Single-ended load
Single-ended load
speakON
connector
Channel 2
output
stage B
CHB +
CHB +
CHB –
CHB –
B
speakON
connector
Channel1
output
stage A
CHA +
CHA +
CHA –
CHA –
A
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
FIGURE 12: Loudspeaker connections: single-
ended loads (top), bridged-tied load (bottom).
Bridge-tied load
speakON
connector
Channel 2
output
stage B
LINK
CHB +
CHB +
CHB –
CHB –
B
speakON
connector
Channel 1
output
stage A
CHA +
CHA +
CHA –
CHA –
A
CH1
CH2
Single-ended load
Single-ended load
speakON
connector
Channel 2
output
stage B
CHB +
CHB +
CHB –
CHB –
B
speakON
connector
Channel1
output
stage A
CHA +
CHA +
CHA –
CHA –
A
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
