Performance 

Frequency Response (at 1 watt, 20 Hz - 20 kHz): ±0.25 dB.  

Signal to Noise Ratio below rated power (20 Hz to 20 kHz): 105 dB A-weighted. 

Total Harmonic Distortion (THD) at full rated power, from 20 Hz to 20 kHz: CTs 600< 0.1%.  

Damping Factor: 10 Hz to 100 Hz: > 3000. 

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: < 2 mV. 

Input Impedance (nominal): 10 kilohms balanced, 5 kilohms unbalanced. 

Maximum Input Level: +20 dBu before input compression, +32 dBu absolute maximum. 

Load Impedance (Note: Safe with all types of loads): 

• CTs 600: Stereo: 2/4/8/16 ohms, 70V.“ Bridge Mono: 4/8/16 ohms, 140V.““  

Voltage Gain (at maximum level setting): 

8/4 ohm operation, 1.4V sensitivity

    CTs 600 35:1 (31 dB)

    26 dB: 20:1 (26 dB).

70V operation, 1.4V sensitivity or 100V operation, 2.0V sensitivity: 50:1 (34 dB).  

Required AC Mains (+15%, –25%): 120V/60 Hz, 230V/50 Hz. 

Power Draw at Idle (120VAC mains):
    CTs 600: 24W (standby mode)“
 

Cooling: Continuously variable speed forced air, front-to-back airflow. 

Dimensions: 19 in. (48.3 cm) W x 3.5 in. (8.9 cm) H x 14.25 in. (36.2 cm) D. 

Weight: Net, Shipping
    CTs 600:  27.7 lb    

Front Panel Controls and Indicators 

Bridge Mode Indicator: Yellow LED illuminates when the rear-panel Mode Switch is set to the “Bridge” position. 

Ready Indicator: Green LED, one per channel, illuminates when the channel is initialized and ready to produce audio output. Indicator is off when PIP puts the amplifier in standby mode via the IQ system. 

Signal Indicators: Three green LEDs per channel indicate the amplifier’s input and output signal levels. 

Signal: input signal is above –40 dBu.“–20 dB: amplifier output is 20 dB below clipping.“–10 dB: amplifier output is 10 dB below“clipping. 

Clip Indicator: Red LED, one per channel, illuminates when the channel’s output signal reaches the onset of audible clipping. The Clip Indicator also will illuminate during Thermal Level Control (TLC) limiting or when the input compressor/limiter is protecting the amplifier from input overload. 

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. 

Fault Indicator: Red LED, one per channel, flashes when the amplifier output channel has stopped operating. 

Data Indicator: Yellow LED indicates IQ Loop data activity (if the amplifier is equipped with an IQ-PIP2 module, and connected to an IQ Loop). 

Power Indicator: Blue LED indicates amplifier has been turned on and AC power is available. The LED will flash when the AC line voltage is 15% above or 25% below the nominal rated value. 

Cooling Vents: Front-to-rear forced airflow. 

Power Switch: Push-on / push-off switch. 

Back Panel Controls and Connectors 

Power Cord Connector: Standard 15 amp IEC inlet. Voltage is indicated above IEC inlet. 

Reset Switch: Resets the circuit breaker that protects the power supply. 

Speaker Connectors: One four-pole touch-proof terminal strip. Accepts up to 10 AWG terminal forks. 

Input Connectors: Balaced 3-pin terminal block connectors, one per channel, on the standard PIP2-BBY module. 

Channel Level Control: One 21-position detented rotary attenuator per channel, ranging from minus infinity (–70 dB) to 0 dB gain. 

Mode Switch: Two-position switch is used to select the amplifier’s mode of operation: Dual or Bridge-Mono. 

Highpass Filter: One 3-position switch per channel selects between OFF, 35Hz and 70Hz 3rd-order filters. 

“Y” Input Switch: When set to ON, this switch parallels the input signals of the two channels, for use when the input signal is mono. Also can be used to daisy-chain the signal to another amplifier. 

Ventilation Grille: Front-to-rear forced airflow. 

Options  

PIP2 modules, including the PIP-Lite, PIP-USP3, and PIP-USP3/CN. 

Protection Systems 

Thermal Level Control (TLC): If an amplifier channel starts to overheat, the TLC system will engage the input compressor. By compressing the input, the amplifier will not generate as much heat and will have a chance to cool down.  

Junction Temperature Simulation (JTS): In the CTs 600, if excess power is demanded, JTS circuitry limits the drive level of the output devices to a safe range, preventing damage. 

Fault: The amplifier will light the Fault LED if the amplifier output stage stops operating.  

AC Under/Over Voltage Protection: If the AC line voltage drops below 25% or rises above 15% of the nominal operating voltage of the amplifier, 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. 

Circuit Breaker: This breaker protects the amplifier from excessive AC current draw. 

DC Output Servo: The output servo circuit protects your drivers by eliminating DC offset, even in the presence of very large asymmetrical signals. 

Inrush Limiting: A soft-start circuit in the power supply minimizes the amplifier’s current draw during power-on. 

Variable-speed Fan: Two continuously variable speed fans direct the airflow through the amplifier for cooling.