Crown CTS 600 - Manual (Page 29)

COMMERCIAL AUDIO
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www.crownaudio.com
T he Crown ® 140MPA is a high-value mixer-amplifier for commercial audio. It provides 4-ohm and
constant-voltage outputs (25V and 70V). Typical uses are paging, background music, and music-
on-hold. The unit provides 4 inputs (each with a volume control) and a 40W amplifier output. Other
features include priority ducking, phantom power, and capability for remote volume control. Multiple
units can be linked.
SPECIFICATIONS
Performance
Frequency Response (at 1 watt from 4-ohm tap):
50 Hz to 15 kHz ± 1 dB.
Frequency Response (at line out): 50 Hz to 15
kHz ± 1 dB.
Power Bandwidth (at 4-ohm tap, 2 dB below
maximum 1 kHz power): 50 Hz to 20 kHz with
< 0.5% THD.
Signal to Noise Ratio (ref. to rated power, master
volume at minimum): >90 dB.
DC Output Offset: < ±5 mV.
THD: < 0.5% at rated power at 1 kHz.
Input Sensitivity (for full output at maximum
gain):
Balanced mic inputs 3 mV.
Balanced line inputs 800 mV.
RCA connectors 400 mV.
Input Impedance (nominal):
Mic: 400 ohms.
Line: 100 kilohms.
RCA: 50 kilohms.
Crosstalk: –70 dB at 1kHz.
Line Output Level (nominal): 1V into 10 kilohms.
Phantom Power: 15 VDC.
AC Line Voltage and Frequency Configurations
Available: 120V/60Hz.
AC Voltage Tolerance: +15%, –20%.
Operating Temperature/Humidity: 0° C to 40° C
at 95% relative humidity (non-condensing).
Storage Temperature: –20° C to 85° C.
Front Panel Controls and Indicators
Power Switch: Pushbutton on-off switch.
Input Volume Controls: Four controls, one per
input. Detented potentiometers with knobs.
Tone Controls: Bass and Treble non-detented
recessed potentiometer on each input channel.
Bass ±10 dB at 100 Hz, Treble ±10 dB at 10 kHz.
Power Indicator: Blue LED indicates power on.
Input Signal Presence Indicator: Green LED, one
for each input channel, illuminates when input sig-
nal exceeds –40 dBu.
Output Signal Presence Indicator: Green LED illu-
minates when output signal level exceeds 100 mV
(45 dB below full power) from the 4-ohm tap.
Clip Indicator: Red LED on output illuminates at
threshold of audible distortion.
Master Output Volume Control: Detented potenti-
ometer with knob.
Back Panel Controls, Connectors and
Indicators
Reset Switch: Resets the circuit breaker that pro-
tects the power supply.
AC Power Inlet: Detachable IEC.
Amplifier Output Connector: 4-position terminal
strip with COM (Common), 4 ohms, 25V and 70V
terminals. Accepts up to 10 AWG terminal forks.
Non-touch cover included.
Output VCA Connector: 4-pin Phoenix-type con-
nector for two VCA control lines of +10 VDC and
ground. Compatible with Crown 1-VCAP module.
Priority Connector: 3-pin Phoenix-type connector
for push-to-talk mic contact closure.
Preamp Line Out Connector: 3-pin balanced
Phoenix-type connector. Post master, pre-VCA.
Level controlled by master volume control.
MOH 1V Level Control: Trim pot adjusts level for
Music-On-Hold 1V output.
MOH 1W Level Control: Trim pot adjusts level for
Music-On-Hold 1W output.
MOH SPI Indicator: Flashes when MOH signal is
present.
MOH 1V Phoenix Connector: 3-pin Phoenix
connector for 1V, 600-ohm transformer-isolated
output.
MOH 1W Phoenix Connector: 3-pin Phoenix con-
nector for 1W output.
MOH 1V RCA Connector: Two mono RCA connec-
tors for 1V output (in parallel with 600-ohm con-
nections so they are isolated).
Balanced Input Connector: Detachable 3-pin
Phoenix style connector for balanced line-level sig-
nals, one each for input channels 2-4.
Balanced Input Connector: Detachable 3-pin
Phoenix style connector for balanced mic-level line-
level signals, for input channel 1.
Tel Connector: Transformer-isolated 600-ohm
input, summed into Input 1 for paging from a tele-
phone system.
Dual RCA Input Connector: For stereo music
signals, unbalanced, summed together, two con-
nectors per input channel.
Amp Input Connector: 3-pin Phoenix-type, high
impedance balanced. Used to link an additional
mixer to the mixer-amplifier. Can be used to con-
nect an external processor.
Mic/line Switch: Selects mic-level or line-level
signal for Input 1.
Phantom Power Switch: Turns phantom power on
or off for Input 1.
VOX Threshold: Trim pot controls how loud the
voice must be before ducking occurs. Can be set
for no ducking.
Link In/Out Switch: Slide switch. When set to IN,
any signal applied to the Amp Input connector will
be mixed with the input signal(s). When set to OUT,
only the signal from the Amp Input Connector will
appear at the amplifier output.
Priority Connector: 3-pin Phoenix-type connector
for push-to-talk mic contact closure. Input 1 is
the priority input for the amplified output, so Input
1 ducks the other inputs. Threshold of activation
depends on input voltage. Ducking does not affect
MOH outputs.
Active Indicator: Illuminates when VOX ducking
is active.
Cooling
Convection cooled.
Protection
Current Limit Protection: Included.
Thermal Limit Protection: Over-temperature
thermal cutout.
DC-Fault Load Protection: Included.
Turn On/Turn Off: No thumps or pops.
Included Accessories
Power cord.
Detachable rack ears.
Screws for rack ears.
Non-touch cover for output connectors.
Phoenix-type connectors.
Spade lugs.
Optional Accessories
1-VCAP remote volume control.
Dimensions
Width (without rack ears): 17.3 in. (43.8 cm).
Width (with rack ears): EIA Standard 19 in. (48.3-
cm) W (EIA RS-310-B).
Height (front panel): 3.5 in. (8.9 cm).
Height (including feet): 4.1 in. (10.5 cm).
Depth (front panel to back panel): 12.2 in. (31.0
cm).
Depth (front of knobs to back of non-touch cover):
13.9 in. (35.2 cm).
Weight
Net Weight: 17 lb (7.7 kg).
Shipping Weight: 22 lb (9.98 kg).
Regulatory Certifications