CTs 2-Channel Series CTs 600 CTs 1200 Operation Manual CTs 2000 CTs 3000 Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000. This manual does not include all of the details of design, production, or variations of the equipment.
CTs 2-Channel Power Amplifiers Important Safety Instructions 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) page 2 Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with a dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
CTs 2-Channel Power Amplifiers Table of Contents Important Safety Instructions .......................................................... 2 5.1.4 High-Pass Filters ......................................................14 Table of Contents ........................................................................... 3 5.1.5 Low-Pass Filters .......................................................14 1 Welcome ....................................................... 4 5.1.6 AC Under/Over Voltage Protection .
CTs 2-Channel Power Amplifiers CTs 600 2-ohm Dual (per ch.) 4-ohm Dual (per ch.) 8-ohm Dual (per ch.) 16-ohm Dual (per ch.) 70V Dual (per ch.) 4-ohm Bridge 8-ohm Bridge 16-ohm Bridge 140V Bridge * 20 Hz–20 kHz Power 150W 300W 300W 300W 300W 300W 600W 600W 600W *20 Hz–20 kHz Power: refers to maximum average power in watts from 20 Hz to 20 kHz with 0.1% THD. CTs 1200 2-ohm Dual (per ch.) 4-ohm Dual (per ch.) 8-ohm Dual (per ch.) 16-ohm Dual (per ch.) 70V Dual (per ch.
CTs 2-Channel Power Amplifiers 1 Welcome • • • • Operation Manual Features (continued from page 4) • Switchable high-pass filter for each channel provides low-frequency roll off to eliminate step down transformer saturation when used in distributed systems. Legendary Crown class I (BCA) and class AB+B (Multi-Mode ®) output topologies offer the best in amplifier reliability. CTs 600/1200 use Class AB+B; CTs 2000/ 3000 use Class I.
CTs 2-Channel Power Amplifiers 3 Setup 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 transportation company immediately. Only you can initiate 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.
CTs 2-Channel Power Amplifiers 3 Setup 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. Figure 3.3 Balanced Input Connector Wiring NOTE: Custom wiring should only be performed by qualified personnel. Figure 3.4 Unbalanced Input Connector Wiring 3.
CTs 2-Channel Power Amplifiers 3 Setup 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” position 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 necessary. The amplifier’s channel outputs are still independent.
CTs 2-Channel Power Amplifiers 3 Setup 3.6.3 Dual 70V/100V Mode Typical input and output wiring, along with Attenuator and Mode Switch settings are shown in Figures 3.10 and 3.11. Make sure the Mode switch is set to the “Dual” position when operating in Dual mode. INPUTS: Connect input wiring to both channels. OUTPUTS: In Dual Mode, the CTs 600/1200 can power 25/50/70V lines; the CTs 2000/3000 can power 25/50/70/100V lines.
CTs 2-Channel Power Amplifiers 3 Setup 3.6.5 Dual Mode with “Y” Input See Figure 3.14. This configuration feeds a mono signal to both Channel 1 and Channel 2. In the example in Figure 3.14, Channel 1 is driving a lowimpedance loudspeaker and Channel 2 is driving a loudspeaker with a 70V transformer. INPUTS: Connect the signal to the Channel 1 input. On the back panel, set the “Y” Input Switch to ON.
CTs 2-Channel Power Amplifiers 3 Setup 3.7 Connect to AC Mains On the back panel, check whether your amplifier is labeled for 120V or 220-240V AC mains. Connect your amplifier to the corresponding AC mains power source (power outlet) with the supplied AC power cordset. First, connect the IEC end of the cordset to the IEC connector on the amplifier. Then, with the amplifier in the OFF position, plug the other end of the cordset into the AC mains.
CTs 2-Channel Power Amplifiers 4 Operation 4.2 Front Panel Controls and Indicators A. Fault Indicator Red LED, one per channel, flashes when the amplifier output channel has stopped operating. Usually this means that the amplifier must be serviced. B. Thermal Indicator Red LED, one per channel, illuminates when the channel has shut down, or is very near shutting down, due to thermal stress or overload. C.
CTs 2-Channel Power Amplifiers 4 Operation 4.3 Back Panel Controls and Connectors. CTs 2000/3000 back panel is shown. CTs 600/1200 look slightly different near the Reset button. M. Power Cord Connector Standard 15 amp IEC inlet. A circuit breaker located near the IEC power inlet protects the amplifier from excessive AC current draw. N. Reset Switch Resets the circuit breaker that protects the power supply. O. Ventilation Grille Air flow is front to back. Do not block the ventilation grilles. P.
CTs 2-Channel Power Amplifiers 5 Advanced Features and Options NOTE: For detailed information about these Crown amplifier features, please consult the Crown Amplifier Application Guide, available on the Crown website at www.crownaudio.com 5.1.3 Fault The amplifier will light the Fault LED if the amplifier output stage stops operating. If this happens, see Section 8 for servicing information. 5.
CTs 2-Channel Power Amplifiers 5 Advanced Features and Options 5.2.4 Input Sensitivity Switches To access the Input Sensitivity Switches, remove the PIP2-BBY Input Panel. The switches are in the top surface of the cavity behind the Input Panel. One 3-position switch per channel selects among these settings: CTs 600/1200: 1.4V (8/4 ohms), 26 dB gain, and 1.4V (70V operation). CTs 2000/3000: 1.4V (8/4 ohms), 26 dB gain, and 1.4V (70V) / 2V (100V).
CTs 2-Channel Power Amplifiers 5 Advanced Features and Options 5.3.1 Channel Level Control The signal level for each input can be attenuated accurately by adjusting the 21-step Level Control (see Section 4.3). Figure 5.5 shows the CTs 600/1200 attenuation in dB for each detent. Figure 5.6 shows the CTs 2000/3000 attenuation in dB for each detent. Note: Attenuation per detent varies with operating mode since gain varies with operating mode. Attenuation amounts shown may vary ±6%.
CTs 2-Channel Series Power Amplifiers 6 Troubleshooting CONDITION: Power indicator is off. POSSIBLE REASON • The amplifier has lost AC power. • The amplifier’s Power switch is off. • The amplifier is not plugged into the power receptacle. • The amplifier output level is so high that the power supply circuit breaker has tripped. Allow the unit to cool. Turn down the Level controls. Press the Reset Switch on the back panel. CONDITION: Fault indicator is flashing.
CTs 2-Channel Series Power Amplifiers 6 Troubleshooting CONDITION: No sound, even though the amp has power. Power LED is on without flashing and the amp is receiving an input signal. Signal indicator is flashing. POSSIBLE REASON: • Speakers not connected. • Open circuit due to speaker failure. • There is a short on the amplifier output. First disconnect your speakers from the affected channel(s) one by one to determine if one of the loads is shorted.
CTs 2-Channel Power Amplifiers 7 Specifications Minimum Guaranteed Power (20 Hz - 20 kHz) CTs 600 Power at 0.1% THD CTs 1200 Power at 0.1% THD CTs 2000 Power at 0.35% THD CTs 3000 Power at 0.35% THD 2-ohm Dual (per ch.) 150W 250W 1000W 1500W 4-ohm Dual (per ch.) 300W 600W 1000W 1500W 8-ohm Dual (per ch.) 300W 600W 1000W 1250W 16-ohm Dual (per ch.) 300W 300W 625W 625W 70V Dual (per ch.) 300W 600W 1000W 1500W 100V Dual (per ch.
CTs 2-Channel Power Amplifiers 7 Specifications Performance CTs 600 CTs 1200 CTs 2000 CTs 3000 +20 dBu + 32 dBu +20 dBu + 32 dBu +20 dBu + 32 dBu +20 dBu + 32 dBu 2, 4, 8, 16 ohms and 70V 2, 4, 8, 16 ohms and 70V 2, 4, 8, 16, 70V, and 100V 2, 4, 8, 16, 70V, and 100V 4, 8, 16 and 140V 4, 8, 16 and 140V 4, 8, 16, 140V , 200V 4, 8, 16, 140V, 200V 35:1 (31 dB) 20:1 (26 dB) 50:1 (34 dB) 50:1 (34 dB) 20:1 (26 dB) 50:1 (34 dB) 63.9:1 (36 dB) 20:1 (26 dB) 50:1 (34 dB) 50:1 (34 dB) 71.
CTs 2-Channel Power Amplifiers 7 Specifications Figure 7.1 CTs 600/1200 Typical Frequency Response (1 W, 8 ohms) Figure 7.2 CTs 600/1200 Typical Crosstalk vs. Frequency Figure 7.3 CTs 600/1200 Typical Damping Factor vs.
CTs 2-Channel Power Amplifiers 7 Specifications Figure 7.4 CTs 2000/3000 Typical Frequency Response (1W) Figure 7.5 CTs 2000/3000 Typical Crosstalk vs. Frequency Figure 7.6 CTs 2000/3000 Typical Damping Factor vs.
CTs 2-Channel Power Amplifiers 8 AC Power Draw and Thermal Dissipation This section provides detailed information about the amount of power and current drawn from the AC mains by CTs 2-channel amplifiers and the amount of heat produced under various conditions. The calculations presented here are intended to provide a realistic and reliable depiction of the amplifiers. The following assumptions or approximations were made: • The amplifier’s available channels are loaded, and full power is being delivered.
CTs 2-Channel Power Amplifiers 8 AC Power Draw and Thermal Dissipation CTs 600 LOAD 2 Ohm Dual Duty Cycle AC Mains Power Draw (W) 50% 40% 30% 20% 10% 310 260 210 160 110 Current Draw (Amps) 4, 8 Ohm Dual / 70V Dual / 4 Ohm Bridge Mono 8 Ohm, 16 Ohm Bridge Mono / 140V Bridge Mono Thermal Dissipation 120V 220240V btu/hr kcal/hr 4.0 3.3 2.7 2.1 1.4 2.2 1.8 1.5 1.1 0.
CTs 2-Channel Power Amplifiers 8 AC Power Draw and Thermal Dissipation CTs 2000 LOAD 2, 4, 8 Ohm Dual / 70V Dual / 100V Dual 4, 8, 16 Ohm Bridge Mono 200V Bridge Mono Duty Cycle AC Mains Power Draw (W) 50% 40% 30% 20% 10% 1533 1267 1000 733 467 Current Draw (Amps) Thermal Dissipation 120V 220240V btu/hr kcal/hr 19.7 16.2 12.8 9.4 6.0 10.7 8.9 7.0 5.1 3.3 1821 1594 1366 1138 911 459 402 344 287 230 Figure 8.
CTs 2-Channel Power Amplifiers 9 Service Crown amplifiers are quality units that rarely require servicing. Before returning your unit for servicing, please contact Crown Technical Support to verify the need for servicing. This unit has very sophisticated circuitry which should only be serviced by a fully trained technician. This is one reason why each unit bears the following label: CAUTION: To prevent electric shock, do not remove covers. No user serviceable parts inside.
CTs 2-Channel Power Amplifiers 10 Warranty UNITED STATES & CANADA SUMMARY OF WARRANTY 3 AR YE Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUBSEQUENT OWNER of each NEW Crown product, for a period of three (3) years from the date of purchase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship.
CTs 2-Channel Power Amplifiers 10 Warranty 3 AR YE WORLDWIDE EXCEPT USA & CANADA SUMMARY OF WARRANTY WHAT THE WARRANTOR WILL DO Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A.
CTs 2-Channel Power Amplifiers Crown Factory Service Information Shipping Address: Crown Factory Service, 1718 W. Mishawaka Rd.
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CTs 2-Channel Power Amplifiers DECLARATION of CONFORMITY Crown International, Inc. ISSUED BY: Sue Whitfield 574-294-8289 swhitfield@crownintl.com Crown International, Inc. 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A.