FEATURES

• Patented Crown circuitry handles extreme voltage swings without putting output transistors in series resulting in lower distortion, greater reliability.
• Very low harmonic and intermodulation distortion give best dynamic transfer function in the industry.
• Patented ODEP (Output Device Emulator Protection)circuitry detects and compensates for overheating and overload.
• Full protection against shorted outputs, open circuits, mismatched loads, general overheating, and high-frequency overloads.
• Patented IOC® (Input/Output Comparator) circuitry immediately alerts of any distortion exceeding 0.05%, providing proof of performance.
• P.I.P.® (Programmable Input Processor) accepts accessories that tailor your amplifier to suit individual applications.
• Drives "constant-voltage" (70-V) lines without distortion-producing "step-up" transformers.
• Front panel includes ODEP, IOC, and Signal Presence indicators for each channel and an Enable Indicator.
• Separate voltage supplies for each channel provide excellent crosstalk characteristics as well as provide improved reliability.
• Efficient heat sinks prevent overheating and prolong component life. An optional three-speed fan is available when extra cooling is desired.
• Balanced inputs with adjustable gain and barrier block output connectors are provided for connection.
• Rack mountable in a standard 19 inch equipment rack (the rear must be supported) and multiple units can be stacked on top of each other.
   

SPECIFICATIONS

General

General Protection: If unreasonable operating conditions occur the protection circuitry limits the drive level to protect the output transistor stages, particularly inthe case of elevated temperature. Transformer overheating will result in a temporary shutdown of that particular channel. Controlled slew-rate voltage amplifiers protect the unit against RF burnouts. Input overload protection is furnished at the amplifier input to limit current.

DC Output Offset: (Shorted input) less than ±10 millivolts.

Hum and Noise: At 26 dB gain with 8 ohm load: 105 dB (A-weighted) below rated continuous average 20 Hz to 20 kHz output; 100 dB (20 Hz to 20 kHz) below same rated output.

Phase Response: ±10 degrees 10 Hz to 20 kHz at 1 watt.

Input Impedance: Nominally 20 K ohms, balanced. Nominally 10 K ohms, unbalanced.

Input Sensitivity: (Unbalanced) switchable between 0.775 V at 8/4 ohm or 0.775 V at 70 V or a voltage gain of 26 dB.

Low Voltage Power Supply: ±15 VDC supplies are provided by a fanformer (an added winding on the fan motor), regulated by three terminal regulators.

Power Requirements: 60 Hz, 120 VAC. Draws 60 watts or less at idle. At a continuous 1 kHz sinewave output of 42 watts (1/3 power) into 4 ohms (both channels driven), as many as 4.66 amps are drawn from the 120 VAC source. Similarly, at 125 watts (full power), as many as 7.23 amps are drawn from the 120 VAC source. The unit is rated to draw 3.5 amps at full power for a typical music signal when
both channels are driven into a 4 ohm load. It is extremely important to have adequate AC power available to the amplifier. Power amplifiers can not create energy—they must have the required voltage and current to deliver the undistorted rated wattages you expect. The CT-200 has a 15 -amp line cord in anticipation that it will be used with a 15-amp mains circuit.

Turn On: No dangerous transients. Pour second turn-on delay. Note: This may be changed by resistor substitution. Contact Crown Technical Services Department for details.

Front Panel Controls: Two-position Enable (on/off) rocker power switch.

Rear Panel Controls: Channel 1 and 2 input Level controls and Mode Select switches (8/4-OHM and 70-VOLT). Dual-Mono switch (DUAL, BRIDGE-MONO, and PARALLEL-MONO).

Internal Controls: Sensitivity switch (0.775 V for full output or a 26 dB voltage gain).

Displays

Enable: This amber indicator is on while the amplifier is on to show that the low-voltage power supply is operating.

ODEP: Two green multifunction indicators which show the reserve energy status of each channel. Normally they are brightly illuminated to show that reserve energy is available. In the rare event there is no energy reserve, they will dim in proportion to ODEP limiting. If a tripped breaker or temporary thermal shutdown occurs, the ODEP indicators will stay off. (In the case of a thermal shutdown, the amplifier will return to normal operation after cooling down to a safe operating temperature.)

IOC: Two yellow indicators which are normally off. In the unlikely event the output waveform differs from that of the input by 0.05% ormore, they will flash. In this way, they act as sensitive distortion indicators to provide proof of performance. Note: It is normal for the Channel 2 IOC indicator to remain on in PARALLEL-MONO mode.

SPI: Two green indicators which flash synchronously with the input waveform to indicate signal presence.

Connectors

Inputs: Balanced three-terminal barrier blocks on standard P.I.P. module.

Outputs: Four-terminal barrier block on rear panel. P.I.P.: Standard internal P.I.P. connector is accessable through rear panel to provide Plug-In Panel compatibility. AC Line: Three-wire male connector attached to a minimum cable length of 5 feet.

Dimensions: 19 inch (48.3 cm) standard rack mount width (EIA Std. RS-310-B), 3.5 inch (8.9 cm) height, 16 inch (40.6 cm) depth behind mounting surface, 0.25 inch (0.6 cm) depth in front of mounting surface.

Weight: 29pounds, 6.5ounces(13.3kg). Center of gravity is approximately 6 inches (15 cm) behind the front panel.

Finish: Black splattered-coat steel chassis and front panel with Lexan overlay.

Construction: Steel chassis, specially designed "flow-through" ventilation from front to side panels.

Heat Sinking: Internal heat diffusers with optional fan for forced-air cooling.

Dual

Frequency Response: ±0.1 dB 20 Hz to 20 kHz at 1 watt into 8 ohms.

Harmonic Distortion: Less than 0.05% from 20 Hz to 1 kHz and increasing linearly to less than 0.1 % at 20 kHz, delivering rated continuous average power into 8 ohms per channel.

IM Distortion: Less than 0.05% from 10 milliwatts to rated continuous average power into 8 ohms, per channel measured at 26 dB gain.

Slew Rate: Greater than 13 volts per microsecond.

Damping Factor: Greater than 1000,10 Hz to 400 Hz into 8 ohms.

Load Impedance: Rated for 16,8,4 ohm, and 70-V usage only. Safe with all types of loads (even reactive ones).

Output Impedance: Less than 10 milliohms in series with less than 2 microhenries.

Voltage Gain: 20:1 ±2% or 26 dB ±0.5 dB at maximum level setting

Output Signal: Unbalanced, dual-channel.

Bridge-Mono

Frequency Response: ±0. l dB 20 Hz to 20 kHz at l watt into 8 or 16 ohms.

Harmonic Distortion: Less than 0.1% at l kHz, delivering rated continuous average power into 16 ohms.

IM Distortion: Less than 0.05% from 20 milliwatts to rated continuous average power into 16 ohms, measured at 26 dB gain.

Slew Rate: Greater than 26 volts per microsecond.

Damping Factor: Greaterthan 1000,10 Hz to 400 Hz into 16 ohms.

Load Impedance: Rated for 16,8 ohm, and 140-V usage only. Safe with all types of loads (even reactive ones).

Output Impedance: Less than 100 milliohms in series with less than 6 microhenries.

Voltage Gain: 40:1 ±2% or 32 dB ±0.6 dB at maximum level setting

Output Signal: Balanced, single-channel. Channel 1 controls are active; Channel 2 controls inactive but not removed from operation.

Parallel-Mono

Frequency Response: ±0.1 dB 20 Hz to 20 kHz at 1 watt into 4 or 8 ohms.

Harmonic Distortion: Less than 0.1% at 1 kHz, delivering rated continuous average power into 4 ohms.

IM Distortion: Less than 0.05% from 10 milliwatts to rated continuous average power into 4 ohms, measured at 26 dB gain.

Damping Factor: Greaterthan 1000,10 Hz to 400 Hz into 4 ohms.

Load Impedance: Rated for 4, 2 ohm, and 70-V usage only. Safe with all types of loads (even reactive ones).

Output Impedance: Less than 25 milliohms in series with less than 3 microhenries.

Voltage Gain: 20:1 ±2% or 26 dB ±0.5 dB at maximum level setting

Output Signal: Unbalanced, single-channel. Channel 1 controls are active; Channel 2 controls inactive but not removed from operation.

Output Power

Output Power: Stereo 4 ohm: 125W; Stereo 8 ohm: 105W; Stereo 16 ohm: 70W; Stereo 70V: 95W

                        Bridge-Mono 8 ohm: 250W; 16 ohm: 215W; 140V: 195W

                        Parallel-Mono 2 ohm: 275W; 4 ohm 220W; 70V: 210W