Filter
Top Products
INSTALLED SOUND
• 7
www.crownaudio.com
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 band-
width 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 bal-
anced, 10 kilohms unbalanced.
Maximum Input Level (before input compres-
sion): + 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 Con-
fi gurations Available (±10%): 120V/60 Hz,
220/230/240V/50 Hz.
Power Draw at Idle (120VAC mains, all chan-
nels in 4/8 ohm mode): 58W.
Power Draw at Idle (120VAC mains, all chan-
nels in 70V mode): 77W.
Cooling: Continuously variable speed forced air,
front-to-back airfl ow.
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 amplifi er is
powered up, Bridge LED will fl ash, indicating
that the amplifi er 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.
C
rown’s CTs Multi-Channel Series offers wide flexibility for a wide range of installed sound applica-
tions. CTs Multi-Channel Series amplifiers offer independent selection of high- and low-impedance
operation for each channel pair, making these amps ideal for multi-zone installations.
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, illu-
minates 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,
fl ashes when a state of thermal stress or over-
load has caused the channel to shut down. If
the power supply goes into thermal overload, all
channel LEDs will fl ash.
Fault Indicator: Red LED, one per channel,
fl ashes when a fault condition has occurred in
the channel.
Ventilation Grille: Front-to-rear forced airfl ow.
Data Indicator: Yellow LED indicates IQ Loop
data activity (if the amplifi er 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 amplifi er shuts off
due to an under-/over-voltage condition on the
AC mains.
Power Switch: Amplifi er 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, rang-
ing 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: 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 amplifi er, and allows other
amplifi 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 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 fl ash brightly to alert the user that a state of
thermal stress or overload has cause the chan-
nel to shut down.
FIT (Fault Isolation Topology): Isolates faults within
affected channels.
Fault: If an amplifi er channel requires service,
the corresponding Fault indicator will illuminate
to alert the user of this condition. If this occurs,
return the amplifi er to the Crown factory or to an
authorized Crown service center.
High-Pass Filter: A fi xed 35-Hz (70-Hz in CTs
4200) high-pass fi lter per channel pair is auto-
matically inserted when the mode switch is set
to either of the constant-voltage settings. The
high-pass fi lter 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 amplifi er’s power supply turns off and the
blue Power LED fl ashes. The amplifi er will turn
back on when the AC line voltage returns to safe
operating levels.
Models
Under-Voltage
Limit
Over-Voltage
Limit
100VAC
(CTs 8200 only)
90VAC 110VAC
120 VAC units 108VAC 132VAC
220V/230V/240V
units
198VAC 264VAC
Power Fuse: A fuse protects the amplifi er from
excessive AC current draw.
Inrush Limiting: A soft-start circuit in the power
supply minimizes the amplifi er’s current draw
during power-on.
Variable-speed Fan: Continuously variable
speed fan directs the airfl ow through the ampli-
fi er for cooling.
Regulatory Certifications
Other Applications
8/07 136318-1K