Operation Manual
CTs Power Amplifiers
page 6
page 7
CTs Power Amplifiers
Operation Manual
Power
Data
1
2
Bridge
3
4
Bridge
Fault
Thermal
Clip
Signal
Ready
3.1 Unpack Your Amplifier
Please unpack and inspect your amplifier for
any damage that may have occurred during
transit. If damage is found, notify the
transpor tation company immediately. Only you
can ini tiate a claim for shipping damage. Crown
will be happy to help as needed. Save the
shipping carton as evidence of damage for the
shipper’s inspection.
We also recommend that you save all packing
materials so you will have them if you ever need
to transport the unit.
Never ship the unit
without the factory pack.
YOU WILL NEED (not supplied):
• Input wiring cables
• Output wiring cables
Rack for mounting amplifier (or a stable surface
for stacking)
WaRNiNg: Before you start to set up
your amplifier, make sure you read and
observe the important Safety instruc-
tions found at the beginning of this
manual.
3.2 Install Your Amplifier
caUTiON: Before you begin, make sure
your amplifier is disconnected from the
power source, with the power switch in
the “off” position and all level controls
turned completely down (counterclock-
wise).
Use a standard 19-inch (48.3-cm) equipment
rack (EIA RS-310B). See Figure 3.1 for ampli fier
dimensions.
You may also stack amps without using a
cabinet.
NOTE: When transporting, amplifiers should be
supported at both front and back.
3.3 Ensure Proper Cooling
When using an equipment rack, mount units
directly on top of each other. Close any open
spaces in rack with blank panels. DO NOT block
front, rear or side air vents. The side walls of the
rack should be a minimum of two inches (5.1
cm) away from the amplifier sides, and the back
of the rack should be a minimum of four inches
(10.2 cm) from the amplifier back panel.
Figure 3.2 illustrates standard amplifier airflow.
3 Setup
Figure 3.1 Dimensions
Left: CTs 4200 Right: CTs 8200
Figure 3.2 Airflow
3.4 Choose Input Wire
and Connectors
Figure 3.3 shows connector pin assignments for balanced wiring, and Figure
3.4 shows connector pin assignments for unbalanced wiring.
When possible, use balanced wiring for signal input, which provides better
rejection of unwanted noise and hum. For more information, refer to the Crown
Amplifier Application Guide,
available online at www.crownaudio.com
NOTe: custom wiring should only be performed by qualified
per sonnel.
Figure 3.3 Balanced Input
Connector Wiring
Figure 3.4 Unbalanced Input
Connector Wiring
3 Setup
3.5 Choose Output Wire and
Connectors
Crown recommends using professionally constructed, high-
quality, two- or four-conductor, heavy gauge speaker wire and connectors. You
may use terminal forks or bare wire for your output connectors (see Fig ure
3.5). CTs amplifier terminal strips accept up to 10 AWG terminal forks which fit
over a #8 screw. For best results, Crown recommends Panduit part #PV10-
10LF-L or equivalent terminal fork. Screw spacing is shown in Figure 3.5.
To connect outputs, first remove the touch-proof cover plate covering the
ter minal strip by removing the screw which holds it in place.
To prevent the possibility of short-circuits, wrap or otherwise insulate exposed
loudspeaker cable and connectors. Also, a touch-proof cover plate, which
covers the terminal strips, is provided to help prevent short circuits. The cover
plate should be reinstalled after connecting outputs.
Suggested below are guidelines to select the appropriate size of wire based on
the distance from amplifier to speaker. Check with local code as this may vary.
distance
Wire Size
up to 25 ft (7.6 m)
16 AWG
26-40 ft (7.9-12.2 m)
14 AWG
41-60 ft (12.5-18.3 m)
12 AWG
Over 60 ft (18.3 m)
10 AWG
caUTiON
:
Never connect the speaker return to the chassis of the
amplifier, or damage to the amplifier may result.
caUTiON: Never use shielded cable for output wiring.
Figure 3.5 Output Connector Wiring
(Typical of two channels)
See the Crown
Amplifier
Appli cation Guide
, available
online at www.crownaudio.com,
for pin assignments for
commonly used connector
types.
Output panel
shown with
touch-proof
cover plate
removed.
NOTe: cTs 8200 is shown. Some cTs 4200 features are in different locations.
Summary of Contents for Crown CTs Series
Page 17: ......