Crown Complete Manual for CTS Multi-Channel Amplifiers: Setup, Wiring, and Features
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CTs Multi-Channel Power Amplifiers

3 Setup

3.4Choose 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.

3.5Choose 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.

Operation Manual

Figure 3.3 Balanced Input

Connector Wiring

See the Crown Amplifier Appli- cation Guide, available online at www.crownaudio.com, for pin assignments for commonly used connector types.

Figure 3.4 Unbalanced Input

Connector Wiring

NOTE: CTs 8200 is shown. Some CTs 4200 features are in different locations.

Output panel

shown with touch-proof cover plate removed.

Figure 3.5 Output Connector Wiring

(Typical of two channels)

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Contents Some models may be exported under the name Amcron CTsCTs Series amplifiers require Class 2 output wiring Important Safety InstructionsOr has been dropped EMC Standards Safety StandardEuropean Representatives Name and Address Family Name CTsAC Power Draw and Thermal Dissipation SetupTroubleshooting SpecificationsProven Crown AB+B Multi-Modeoutput topology How to Use This ManualFeatures WelcomeUnpack Your Amplifier Install Your Amplifier SetupOver 60 ft 18.3 m Choose Input Wire and ConnectorsChoose Output Wire and Connectors Crown recommends using professionally constructed, highDual 70V Mode Wire Your System Dual 8/4 ModeBridge-Mono 100V Mode Bridge-Mono 16/8 ModeConnect to AC Mains Startup ProcedureOperation PrecautionsClip Indicator Front Panel Controls Indicators Bridge Mode IndicatorReady Indicator Signal IndicatorInput Connectors Back Panel Controls Connectors AC Power Cord ConnectorOutput Connectors Accessory PanelAdvanced Features Options Attenuation in dB Channel Level ControlInput Sensitivity Options Control ModulesWall-Mount level control panels for use with VCA module Choosing the Right ModuleRefer to .1.6 for specific voltage requirements TroubleshootingThermal Level Control TLC is active Mode switch was switched while the power was on Power supply thermal overloadDual Mode SpecificationsDimensions Width, Height, Depth Crosstalk below rated power, 20 Hz to 1 kHzCommon Mode Rejection CMR 20 Hz to 1 kHz Power Draw at Idle 120VAC mains, all channels in 70V modeCTs 8200 Typical Frequency Response 1 W CTs 8200 Typical Output Impedance vs. Frequency AC Power Draw and Thermal Dissipation AC Power Draw Thermal DissipationOhms Bridge 320x4 Service 12/01 WarrantyWorldwide Except USA & Canada CTs Multi-Channel Power Amplifiers Nature of Problem Crown Factory Service InformationThis page Intentionally Left Blank CTs Multi-Channel Power Amplifiers
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