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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)
- Required AC Mains: 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 input signals above –40 dBu.
- Clip Indicator: Red LED, one per channel, illuminates 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 illuminate 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 amplifi er has been turned on and AC power is available. Indicator also fl ashes 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
IQ-MC4A or VCA-MC4A module. CTs 8200 accepts
an optional IQ-MC8 or VCA-MC8 module.
Channel Level Controls: One 21-position detented
rotary potentiometer per channel, ranging from
infi nity (–70 dB) to 0 dB attenuation.
Input Connectors: Removable Phoenix-style barrier
connectors for balanced input.
Mode Switch: Used on each consecutive pair
of channels, this four-position switch is used to
select the amplifi er’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 airfl ow.
Options
Control Modules: IQ-MC4A: IQ module for CTs
4200A; VCA-MC4A: VCA module for CTs 4200A.
IQ-MC8: IQ module for CTs 8200; 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 amplifi er, and allows other ampli-
fi ers 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 amplifi er channel
starts to overheat, the TLC circuit will engage
that channel’s input compressor. By compressing
the input, the amplifi er will not generate as
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