`` SPECIFICATIONS
Frequency Response (at 1 watt, 20 Hz - 20 kHz): ±0.5 dB.
Phase Response (at 1 watt, 10 Hz - 20 kHz): ±35°. Signal to Noise Ratio below rated power (20 Hz to
20 kHz): 100 dB unweighted.
Total Harmonic Distortion (THD) at 1 watt, from 20 Hz to 20 kHz: < 0.05%.
Intermodulation Distortion (IMD) 60 Hz and 7 kHz at 4:1, from 163 milliwatts to full bandwidth power: < 0.05% (typical).
Damping Factor: 10 Hz to 400 Hz: >180.
Crosstalk (below rated power, 20 Hz to 1 kHz): > 80 dB.
Common Mode Rejection (CMR) (20 Hz to 1 kHz): > 50 dB.
DC Output Offset (shorted input): < ±5 mV.
Input Impedance (nominal): 20 kilohms balanced, 10 kilohms unbalanced.
Maximum Input Level (before input compression): + 20 dBu.
Load Impedance: (Note: Safe with all types of loads)
Stereo: 4/8 and 25 ohms (70V)
Bridge Mono: 8/16 and 50 ohms (100V)
Voltage Gain (at maximum level setting), 1.4V sensitivity,
4/8 Ohm Operation: 20:1 (26 dB);
70V Operation: 50:1 (34 dB)
100V Operation: 71.4:1 (37 dB)
AC Line Voltage and Frequency Configurations Available (±10%): 120V/60 Hz, 220/230/240V/50 Hz.
Power Draw at Idle (120VAC mains, all channels in 4/8 ohm mode): 58W.
Power Draw at Idle (120VAC mains, all channels in 70V mode): 77W.
Cooling: Continuously variable speed forced air, front-to-back airflow.
Dimensions (Width, Height, Depth):
CTs 4200: 19 in. (48.3 cm) W x 3.5 in. (8.9 cm) H x 16.25 in. (41.3 cm) D.
CTs 8200: 19 in. (48.3 cm) W x 5.25 in. (13.3 cm) H x 16.25 in. (41.3 cm) D.
Weight (Net, Shipping):
CTs 4200: 27 lb 8 oz (12.5 kg), 32 lb (14.5 kg)
CTs 8200: 36 lb 6 oz (16.5 kg), 47 lb (21.3 kg).
Front Panel Controls and Indicators
Bridge Mode Indicator: Yellow LED, one per channel pair, illuminates when the channel pair’s Mode Switch is set to the “Bridge” position. If Mode switch is changed while amplifier is powered up, Bridge LED will flash, indicating that the amplifier must be powered off and on to reset the Mode.
Ready Indicator: Green LED, one per channel, illuminates when the channel is initialized and ready to produce audio output.
Signal Indicator: Green LED, one per channel, illuminates to indicate the presence of analog input signals above –40 dBu.
Clip Indicator: Red LED, one per channel, illumi- nates when the THD of the channel’s output signal rises to a level typically considered as the onset of audible clipping. The Clip Indicator also will illumi- nate during Thermal Level Control (TLC) or input overload.
Thermal Indicator: Red LED, one per channel, flashes when a state of thermal stress or overload has caused the channel to shut down. If the power supply goes into thermal overload, all channel LEDs will flash.
Fault Indicator: Red LED, one per channel, flashes when a fault condition has occurred in the channel.
Ventilation Grille: Front-to-rear forced airflow.
Data Indicator: Yellow LED indicates IQ Loop data activity (if the amplifier is equipped with an IQ-MC module, and connected to an IQ Loop).
Power Indicator: Blue LED indicates amplifier has been turned on and AC power is available. Indica- tor also flashes if the amplifier shuts off due to an under-/over-voltage condition on the AC mains.
Power Switch: Amplifier is on when the switch is in the IN position.
Back Panel Controls and Connectors
AC Power Cord Connector: IEC inlet, type 320;
100/120VAC units: 15A;
220/230/240VAC units: 10A. Voltage is indicated above IEC inlet.
Output Connectors: One four-pole terminal strip for every two channels with touch-proof cover. Accepts up to 10 AWG terminal forks.
Accessory Panel: CTs 4200 accepts an optional VCA-MC4A module. CTs 8200 accepts an optional VCA-MC8 module.
Channel Level Controls: One 21-position detented rotary potentiometer per channel, ranging from infinity (–70 dB) to 0 dB attenuation.
Input Connectors: Removable Phoenix-style barrier connectors for balanced input. Also can be used as a CobraNet input or a backup for CobraNet.
Mode Switch: Used on each consecutive pair of channels, this four-position switch is used to select the amplifier’s mode of operation: Dual 8/4 ohms, Dual 70V, Bridge-Mono 16/8 ohms, and Bridge- Mono 100V.
Cooling Vents: Front-to-rear forced airflow.
Options
Control Modules: VCA-MC4A: VCA module for CTs
4200A. VCA-MC8: VCA module for CTs 8200.
Wall-mount level control panels for use with VCA module: 1-VCAP:Single-gang panel with 1 VCA channel volume control. 4-VCAP:Two-gang panel with 4 VCA channel volume controls.
T-170V:This is an autoformer that allows 100V output from the amplifier, and allows other ampli- fiers without direct constant voltage output to be easily integrated into distributed systems.
TP-170V:This is a rack-mountable panel with four autoformers as described above.
Protection Systems
Thermal Level Control (TLC): If an amplifier chan- nel starts to overheat, the TLC circuit will engage that channel’s input compressor. By compress- ing the input, the amplifier will not generate as much heat and will have a chance to cool down. The degree of compression is proportional to the amount of overheating. If the channel becomes too hot for safe operation even after full TLC limiting, the channel will shut off, and the Thermal Indicator for that channel will flash brightly to alert the user that a state of thermal stress or overload has cause the channel to shut down.
FIT (Fault Isolation Topology): Isolates faults within affected channels.
Fault: If an amplifier channel requires service, the corresponding Fault indicator will illuminate to alert the user of this condition. If this occurs, return the amplifier to the Crown factory or to an authorized Crown service center.
High-Pass Filter: A fixed 35-Hz (70-Hz in CTs 4200) high-pass filter per channel pair is automatically inserted when the mode switch is set to either of the constant-voltage settings. The high-pass filter corner frequency in the CTs 8200 can be set to 70 Hz, or bypassed, with a service option.
AC Under-/Over-Voltage Protection: If the AC line voltage varies out of an acceptable range, the amplifier’s power supply turns off and the blue Power LED flashes. The amplifier will turn back on when the AC line voltage returns to safe operating levels.
| Models | Under-Voltage | Over-Voltage |
| Limit | Limit |
| |
| 100VAC | 90VAC | 110VAC |
| (CTs 8200 only) |
| | |
| 120 VAC units | 108VAC | 132VAC |
| 220V/230V/240V | 198VAC | 264VAC |
| units |
| | |
Power Fuse: A fuse protects the amplifier from excessive AC current draw.
Inrush Limiting: A soft-start circuit in the power supply minimizes the amplifier’s current draw during power-on.
Variable-speed Fan: Continuously variable speed fan directs the airflow through the amplifier for cooling.
Regulatory Certifications
Other Applications
INSTALLED SOUND
