Crown DriveCore I-Tech 4x3500B HD, Operation Manual

Page: 8 / 72

Operation Manual
I-Tech HD DriveCore Series Power Amplifiers
page 8
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 shows connector pin assignments for balanced analog
wiring or AES3 digital wiring. The use of standard analog cable
with AES3 will result in diminished performance. For best results,
110 ohm shielded twisted-pair cable for AES3 signals is highly
recommended. Figure 2.6 shows connector pin assignments for
unbalanced analog wiring.
If multiple connectors are needed for AES3 distribution from a
single AES3 source, the following shows the number of AES
connections in parallel based on AES3 switching frequency.
Frequency # of Connections
96kHz 4 AES3 Pairs
48kHz 8 AES3 Pairs
44.1kHz 8 AES3 Pairs
***Please note with good quality 110 ohm shielded digital cable,
it is possible to obtain a higher number of connections than stated
here. It is up to the user to test this based on their use case. The
connections stated here are based on worst case analysis.
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-, four-, or eight-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.
Using the guidelines below, select the appropriate size of wire
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
Figure 2.5
Balanced Analog Input Connector Wiring or
AES3 Digital Connector Wiring
Figure 2.6 Unbalanced Analog Input Connector Wiring
2 Setup
Figure 2.8
Binding Post Connections
Figure 2.7
Left: Speakon
®
Output Connector on Back Panel
Right: Speakon
®
Cable Connector
OUTPUTS
CH1 CH2
DUAL BRIDGE DUAL
CH3 CH4
BRIDGE DUAL DUAL