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2 Setup
2.3.2 Choose Input Wire and Connectors
Crown recommends using pre-built or professionally wired,
bal anced line (two-conductor plus shield), 22-24 gauge cables
and connectors. Use 3-pin male XLR connectors.
Unbalanced line may also be used but may result in noise over
long cable runs.
Figure 2.5
Balanced Analog Input Connector Wiring or
Figure 2.5 shows connector pin assignments for balanced analog
AES/EBU Digital Connector Wiring
wiring or AES/EBU digital wiring. The use of standard analog
cable with AES/EBU will result in diminished performance. For
best results, 110 ohm shielded twisted-pair cable for AES/EBU
signals is highly recommended. Figure 2.6 shows connector pin
assignments for unbalanced analog wiring.
NOTE: Custom wiring should only be performed by qualified
per sonnel.
2.3.3 Choose Output Wire and Connectors
Crown recommends using pre-built or professionally wired, high-
quality, two- or four-conductor, heavy gauge speaker wire and
connectors. Use Class 2 output wiring. You may use a 4-pole
®
Speakon
connector (Figure 2.7) or banana plugs, spade lugs, or
bare wire for your output connectors (Figure 2.8). To prevent the
possibility of short circuits, wrap or otherwise insulate exposed
loudspeaker cable connectors.
CAUTION – SHOCK HAZARD: Potentially lethal voltages
exist at the output connectors when the amplifier is
turned on and is passing a signal.
Figure 2.7
®
Left: Speakon
Output Connector on Back Panel
Using the guidelines below, select the appropriate size of wire
®
Right: Speakon
based on the distance from amplifier to speaker.
Distance
Wire Size
up to 25 ft.
16 AWG
26-40 ft.
14 AWG
41-60 ft.
12 AWG
61-100 ft.
10 AWG
101-150 ft.
8 AWG
151-250 ft.
6 AWG
CAUTION: Never use shielded cable for output wiring.
page 8
I-Tech HD Series Power Amplifiers
Figure 2.6 Unbalanced Analog Input Connector Wiring
Cable Connector
Figure 2.8
Binding Post Connections
I-Tech HD Series Power Amplifiers
2 Setup
2.3.4 Stereo Mode Wiring
Typical input and output wiring is shown in Figure 2.9.
IMPORTANT: Turn off the amplifier and unplug its power cord.
INPUTS: Choose one of these options:
• Connect analog input wiring for both channels.
• Connect an AES/EBU digital signal to the AES/EBU connector.
OUTPUTS: Maintain proper polarity (+/–) on output connectors. Use
Class 2 output wiring.
Figure 2.9 shows how to wire stereo speakers to the binding posts.
Con nect Channel 1 loudspeaker's positive (+) lead to Channel 1 positive
(red) terminal of amp; repeat for negative (–). Repeat Channel 2 wiring as
for Channel 1.
®
To wire stereo speakers to the Speakon
connectors, use one of these
methods:
Method 1 (Table 1 and Figure 2.10): Wire one Speakon
to two speakers. Insert the Speakon
®
cable connector into the amplifier's
top Speakon
®
connector.
Method 2 (Table 2 and Figure 2.11): Plug the Channel 1 speaker into the
®
Channel 1 (top) Speakon
connector, and plug the Channel 2 speaker
®
into the Channel 2 (bottom) Speakon
connector.
Table 1
Stereo Wiring Method 1: Use Top Speakon
PIN
1+
1–
CH
1+
1–
Channel 1
Loudspeaker
Enceinte du
Canal 1
Lautsprecher
Kanal 1
Altoparlante
del Canal 1
Figure 2.10 Wiring Two Stereo Speakers
to the Top Speakon
Operation Manual
Operation Manual
Figure 2.9
System Wiring,
Stereo Mode
®
cable connector
®
Only
2+
2–
Table 2
2+
2–
Stereo Wiring Method 2: Use Both Speakon
PIN
1+
1–
Channel 2
Top Speakon
Loudspeaker
CH
1+
1–
Enceinte du
Canal 2
Lautsprecher
Kanal 2
PIN
1+
1–
Altoparlante
Bottom Speakon
del Canal 2
CH
2+
2–
®
Connector
Figure 2.11
Stereo Wiring
®
Top Speakon
s
Using Both
(Channel 1)
®
Speakon
Connectors
Channel 1
Loudspeaker
Bottom
Speakon
(Channel 2)
Channel 2
Loudspeaker
page 9
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