C T s
CTs 600
2 - C H A N N E L
Architectural & Engineering Specifications
CTs 600 (120 V, 60 Hz models)
The power amplifier shall be a solid-state two-channel model employing
Multi-Mode® (AB+B) output circuitry.
The amplifier shall contain protection circuitry which limits the drive level
placed on the output devices before their SOA (Safe Operating Area) is
exceeded. This protection circuitry shall calculate the instantaneous voltage
across and current through the output devices while factoring in their
simulated junction temperatures to predict how close they are to their
operating limits. This protection shall be called “JTS.”
The amplifier shall contain protection from shorted, open and mismatched
loads, general overheating, DC, high-frequency overloads, under/over voltage, and internal faults.
If an amplifier channel starts to overheat, the Thermal Level Control (TLC)
circuit shall engage that channel’s input compressor in an amount proportional to the amount of overheating, in order to generate less heat. If the
channel becomes too hot for safe operation, the channel shall shut off,
and the Thermal Indicator for that channel shall illuminate brightly to alert
the user that a state of thermal stress or overload has caused the channel
to shut down.
The front-panel control shall be a power switch.
Rear-mounted controls shall include Channel Level Controls, High Pass
Filter Switches (one per channel), and a Mode Switch. The High Pass
Filter Switch shall select between flat and two positions of rolloff. The twoposition Mode Switch selects between Dual or Bridge-Mono operation.
The recommended load impedance in Dual mode shall be 2/4/8/16 ohms,
70V, and 100V with T-170V or TP-170V. The load impedance in BridgeMono mode shall be 4/8/16 ohms, 100V with T-170V or TP-170V, 140V,
and 200V with T-170V or TP-170V. The amplifier shall be safe when driving
any kind of load, including highly reactive ones.
Rear-mounted output connectors shall be one four-pole touch-proof terminal strip. Rear-mounted input connectors shall be 3-pin balanced barrier
connectors on the standard PIP2-BBY module. The module shall include a
“Y” Input Switch which combines the input signals.
The amplifier shall be fully compatible with and shall provide appropriate
input cables and connectors for Crown® PIP2 modules. The amplifier shall
be fully compatible with Harman Pro System Architect and the Crown IQ
Front panel indicators shall include a yellow Bridge-Mode Indicator that
illuminates when the Mode Switch is set to the “Bridge” position (and
flashes if the Mode Switch is changed while the amplifier is powered
up, indicating that the amplifier must be powered off and on to reset the
Mode), a green Ready Indicator (one per channel) that illuminates when
the channel is initialized and ready to produce audio output, a green Signal
Indicator (one per channel) that illuminates to indicate the presence of
input signals above –40 dBu, a red Clip Indicator that illuminates when the
THD of the channel’s output signal rises to a level typically considered as
the onset of audible clipping (and illuminates during Thermal Level Control
or input overload), a red Thermal Indicator (one per channel) that illuminates when a state of thermal stress or overload has caused the channel
to shut down (and illuminates in all channels if the power supply goes
into thermal overload), a red Fault Indicator (one per channel) that flashes
when a fault condition has occurred in the channel, a yellow Data Indicator
that flashes during control data activity (if the amplifier is equipped with an
IQ-PIP2 module and is connected to a control system), and a blue Power
Indicator that illuminates when the amplifier has been turned on and AC
power is available (and flashes when the amplifier shuts off due to an
under-/over-voltage condition on the AC mains).
The power amplifier shall meet or exceed the following performance
criteria. Input sensitivity for rated output: 1.4V. Rated output with both
channels driven in Dual mode with 0.1% THD (20 Hz to 20 kHz): 150 watts
per channel into 2 ohms, 300 watts per channel into 4 ohms, 300 watts per
channel into 8 ohms, 300 watts per channel into 16 ohms, 300 watts per
channel (70V) and 300 watts per channel (100V with T-170V or TP-170V).
Rated output in Bridge-Mono mode with both channels driven at 0.1%
THD (20 Hz to 20 kHz): 300 watts into 4 ohms, 600 watts into 8 ohms;
600 watts into 16 ohms, 600 watts (100V with T-170V or TP-170V), 600
watts (140V), and 600 watts (200V with T-170V or TP-170V). Frequency
Response at 1 watt, 20 Hz to 20 kHz: ±0.25 dB. Signal to Noise Ratio
below rated power (20 Hz to 20 kHz): better than 105 dB A-weighted. Total
Harmonic Distortion at full rated power from 20 Hz to 20 kHz: less than
0.1%. Damping Factor: greater than 3000 from 10 to 100 Hz. Crosstalk
(below rated power, 20 Hz to 1 kHz): greater than 80 dB. Common Mode
Rejection (20 Hz to 1 kHz): 50 dB. DC Output Offset: less than 2 mV. Input
Impedance (nominal): 10 kilohms balanced, 5 kilohms unbalanced. Maximum Input Level (before input compression): + 20 dBu rms. Power Draw
at Idle (120 VAC mains, all channels in 4/8 ohm mode): 24 watts (standby
The amplifier chassis shall be constructed of steel with a durable black
finish and shall be designed for continuously variable-speed forced-air
ventilation from the front panel to the back panel.
The dimensions of the amplifier shall allow for 19 inch (48.3 cm) EIA
standard (RS-310-B) rack mounting. The amplifier shall be 3.5 inches
(8.9 cm) tall, and 14.25 inches (36.2 cm) deep behind the rack-mounting
The amplifier shall weigh 22.8 pounds (10.3 kg).
The amplifier shall be designated the Crown CTs 600.
Crown International
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8200
FAX: 574-294-8FAX
Specifications subject to change without prior notice. Latest
information available at www.crownaudio.com.
Crown®, Multi-Mode®, and IQ System® are registered trademarks of Crown International. Printed in U.S.A.
© 2007 Crown Audio®, Inc.
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