Crown Audio CTs Series (2 Channel) - Manual (Page 5)

Operation Manual
CTs Power Amplifiers
page 8 page 9
CTs Power Amplifiers
Operation Manual
3.4 Choose Input Wire
and Connectors
Figure 3.3 shows connector pin assignments for
balanced wiring, and Figure 3.4 shows connec tor
pin assignments for unbalanced wiring.
NOTe: custom wiring should only be
per formed by qualified personnel.
3.5 Choose Output Wire and
Con nectors
A protective cover is installed over the barrier-
strip output. Some models have a cover with two
holes. To remove this type of cover:
1. Loosen screws inside top and bottom holes of
cover (see Figure 3.6).
2. Slide cover to left or right, then pull it off away
from the amplifier.
3. Tighten screws.
Crown recommends using professionally
con structed, high-quality, two- or four-conductor,
heavy gauge speaker wire and connectors. You
may use terminal forks up to 10 AWG or bare wire
for your output connectors (see Figure 3.5). To
prevent the possibility of short-circuits, wrap or
otherwise insulate exposed loudspeaker cable
connectors. For best results, Crown recom mends
Panduit part #PV10-10LF-L or equivalent
terminal fork. Screw spacing is shown in Figure
3.5.
Using the guidelines below, select the appropri ate
size of wire based on the distance from amplifier
to speaker (low-impedance loads only).
distance Wire Size
up to 25 ft. (7.6m) 16 AWG
26-40 ft. (7.9-12.2m) 14 AWG
41-60 ft. (12.5-18.3m) 12 AWG
> 60 ft (18.3m)
10 AWG
caUTiON: Never use shielded cable for
output wiring.
Replace output cover after output wiring is
complete.
Figure 3.5 Typical Output Connector Wiring
3 Setup
Figure 3.3
Balanced Input
Connector Wiring
Figure 3.4
Unbalanced Input
Connector Wiring
Figure 3.6 How to Remove the Two-Holed
Barrier-Block Cover
3.6 Wire Your System
3.6.1 Dual 8/4/2 Mode
Typical input and output wiring, along with Attenuator
and Mode Switch settings are shown in Figures 3.6 and
3.7. Make sure the Mode switch is set to the “Dual”
posi tion when operating in Dual mode.
INPUTS: Connect input wiring for each channel. The Y
switch on the rear PIP panel can be used to parallel the
channel inputs when only mono input signals are
neces sary. The amplifier’s channel outputs are still
indepen dent.
OUTPUTS: Maintain proper polarity (+/–) on
output connectors.
Connect the Channel 1 speaker’s positive (+) lead to
amplifier Channel 1 positive terminal; repeat for negative
(–). Repeat Channel-2 wiring as for Channel 1. Refer to
Section 3.5 for output connector pin assignments.
3.6.2 Bridge-Mono 16/8/4 Mode
Typical input and output wiring, along with Attenuator
and Mode Switch settings, are shown in Figures 3.8 and
3.9. Make sure the Mode switch is set to the “Mono”
position when operating in Bridge-Mono mode.
INPUTS: Connect input wiring to Channel 1 only.
OUTPUTS: Connect the speaker across the positive
ter minals of each channel pair. Do not use the negative
ter minals of the channel pair when the pair is being
operated in Bridge-Mono mode. Refer to Section 3.5 for
output connector pin assignments.
NOTE: Crown provides a reference of wiring pin
assign ments for commonly used connector types in the
Crown Amplifier Application Guide available at
www.crownaudio.com.
NOTe: When operating in Bridge-Mono mode,
turn down (full ccW) the input attenuator for
channel 2. The channel-1 input atttenuator
works both channels.
See the next page for constant-voltage operation.
Figure 3.7 System Wiring, Dual Mode.
Figure 3.8 Attenuator and Mode-
Switch Settings for Dual Mode
Figure 3.9 System Wiring, Bridge-Mono Mode
Figure 3.10 Attenuator and Mode-
Switch Settings for Bridge-Mono Mode
3 Setup
Always route the input and output
wires in separate bundles.