Crown Audio CT-810 Leaflet
CT-810
D
esigned from the ground up exclusively
for the professional sound contractor,
Com-Tech
Com-Tech
®
offers incredible features,
flexibility, and the best long-term value in
commercial audio today.
commercial audio today.
The Com-Tech 10 Series amps offer the same
features and performance of the original
Com-Techs while delivering upgraded fea-
tures to help make your job easier.
features and performance of the original
Com-Techs while delivering upgraded fea-
tures to help make your job easier.
In a profession where unplanned service
calls quickly wipe out profits, Com-Tech 10
Series
calls quickly wipe out profits, Com-Tech 10
Series
is designed to be the most reliable
amplifier you can install.
For more details about the Crown Com-Tech
10 Series, contact the Crown Technical
Support Group at 800-342-6939 or 219-294-
8200. Also, visit the Crown Audio website at
www.crownaudio.com.
10 Series, contact the Crown Technical
Support Group at 800-342-6939 or 219-294-
8200. Also, visit the Crown Audio website at
www.crownaudio.com.
Specifications
The following applies to 120-VAC, 60-Hz units in Stereo
mode with 8-ohm loads and an input sensitivity of 26-dB
gain unless otherwise specified. Specifications for units
supplied outside the U.S.A. may vary slightly at different AC
voltages and frequencies.
mode with 8-ohm loads and an input sensitivity of 26-dB
gain unless otherwise specified. Specifications for units
supplied outside the U.S.A. may vary slightly at different AC
voltages and frequencies.
Power
Output Power
Load Impedance: Safe with all types of loads.
With 8/4-ohm output, all Com-Techs are rated
for 4 to 8 ohms in Dual mode, 8 to 16 ohms in
Bridge-Mono mode, and 2 to 4 ohms in
Parallel-Mono mode. With 70-volt output,
rated loads vary among the different models
for each dual/mono mode.
With 8/4-ohm output, all Com-Techs are rated
for 4 to 8 ohms in Dual mode, 8 to 16 ohms in
Bridge-Mono mode, and 2 to 4 ohms in
Parallel-Mono mode. With 70-volt output,
rated loads vary among the different models
for each dual/mono mode.
Voltage Gain to 1 kHz, 8-ohm rated output;
20:1 ±3% or 26 dB ±0.25 dB gain at the
maximum level setting.
20:1 ±3% or 26 dB ±0.25 dB gain at the
maximum level setting.
64:1 ±12% or 35 dB ±1 dB gain at 0.775-volt
(8/4-ohm) sensitivity;
(8/4-ohm) sensitivity;
Voltage Gain to 1 kHz, 70-V rated output;
90:1 ±12% or 39 dB ±1 dB gain at 0.775-volt
(70-V) sensitivity.
Required AC Mains: 50/60 Hz-, 100-, 120-,
220-, 240-VAC (±10%) units are available.
North American units are 60 Hz, 120 VAC only.
90:1 ±12% or 39 dB ±1 dB gain at 0.775-volt
(70-V) sensitivity.
Required AC Mains: 50/60 Hz-, 100-, 120-,
220-, 240-VAC (±10%) units are available.
North American units are 60 Hz, 120 VAC only.
AC Line Current;
Current, voltage and frequency requirements
are provided on the unit’s back panel.
At Idle: All units draw 35 watts or less when
idle (in energy-saving mode).
AC Line Connector: NEMA 5-15P plug is
provided on 120-VAC, 60-Hz North American
units. Plug illuminates when unit is powered.
Current, voltage and frequency requirements
are provided on the unit’s back panel.
At Idle: All units draw 35 watts or less when
idle (in energy-saving mode).
AC Line Connector: NEMA 5-15P plug is
provided on 120-VAC, 60-Hz North American
units. Plug illuminates when unit is powered.
Performance
Frequency Response: ±0.1 dB from 20 Hz to
20 kHz at 1 watt.
20 kHz at 1 watt.
Phase Response: ±10 degrees from 10 Hz to
20 kHz at 1 watt.
20 kHz at 1 watt.
Signal-to-Noise Ratio,A-weighted: Better than
105 dB below rated 1 kHz power.
105 dB below rated 1 kHz power.
Total Harmonic Distortion (THD): 1 kHz rated
power, 0.05% or less true THD.
power, 0.05% or less true THD.
Intermodulation Distortion (IMD): (60 Hz and
7 kHz at 4:1) Less than 0.05% from rated
power to 35 dB below rated power at 8 ohms.
7 kHz at 4:1) Less than 0.05% from rated
power to 35 dB below rated power at 8 ohms.
Damping Factor: Greater than 1,000 from 10
Hz to 400 Hz.
Hz to 400 Hz.
Controlled Slew Rate: (Slew rates are limited
to useful levels for ultrasonic/RF protection.)
Greater than 17 volts per microsecond.
to useful levels for ultrasonic/RF protection.)
Greater than 17 volts per microsecond.
Controls
Enable: A front-panel three position-switch
used to select local, off or remote.
used to select local, off or remote.
Level: A 21-position detented back-panel
rotary potentiometer for each channel used to
control the input level.
rotary potentiometer for each channel used to
control the input level.
Sensitivity: A three-position switch located
inside the PIP2 compartment used to select
input sensitivity: 0.775 volts in 8/4-ohm mode
or 0.775 volts in 70-volt mode for full rated
output, or a 26-dB voltage gain.
inside the PIP2 compartment used to select
input sensitivity: 0.775 volts in 8/4-ohm mode
or 0.775 volts in 70-volt mode for full rated
output, or a 26-dB voltage gain.
Dual/Mono: A three-position back-panel
switch used to select Stereo, Bridge-Mono or
Parallel-Mono mode.
switch used to select Stereo, Bridge-Mono or
Parallel-Mono mode.
Reset: A back-panel push button used to reset
the circuit breaker that protects the power
supplies.
the circuit breaker that protects the power
supplies.
Indicators
Enable: An amber front-panel LED that shows
the on/off status of the low-voltage power
supply.
the on/off status of the low-voltage power
supply.
Signal: A green front-panel LED for each
channel that flashes to show amplifier output.
channel that flashes to show amplifier output.
IOC: An amber front-panel LED for each
channel that flashes to show distortion if a
channel’s output waveform differs from its
input by 0.05% or more.
channel that flashes to show distortion if a
channel’s output waveform differs from its
input by 0.05% or more.
ODEP: A green front-panel LED for each
channel that shows thermal-dynamic energy
reserve. Normally, each ODEP indicator is lit to
show available reserve energy. In the rare
event that a channel has no reserve, its
indicator will dim in proportion to ODEP
limiting.
channel that shows thermal-dynamic energy
reserve. Normally, each ODEP indicator is lit to
show available reserve energy. In the rare
event that a channel has no reserve, its
indicator will dim in proportion to ODEP
limiting.
Features
•
Unique power supply allows channels to be
independently operated in either 70-V or 8/4-
ohm mode.
independently operated in either 70-V or 8/4-
ohm mode.
•
Remote feature allows amplifier to be turned
on and off from a remote location by adding
an optional
on and off from a remote location by adding
an optional
R.S.V.P.
accessory.
•
Crown’s
Grounded Bridge™
design delivers
large voltage swings without using easily
stressed output-transistor configurations like
conventional amplifiers. The results are
lower distortion and superior reliability.
stressed output-transistor configurations like
conventional amplifiers. The results are
lower distortion and superior reliability.
•
Patented
ODEP
®
(Output Device Emulation
Protection) circuitry compensates for over-
heating and overload to keep the amplifier
working when others would fail.
heating and overload to keep the amplifier
working when others would fail.
•
IOC
®
(Input/Output Comparator) circuitry im-
mediately alerts of any distortion exceeding
0.05%, providing dynamic
0.05%, providing dynamic
proof of distortion-
free performance
.
•
Enhanced
PIP2™
(Programmable Input Pro-
cessor) connector accepts new accessory
modules that tailor the amplifier to suit spe-
cific applications.
modules that tailor the amplifier to suit spe-
cific applications.
•
Full protection from shorted, open and mis-
matched loads; general overheating; DC;
high-frequency overloads,and protection from
full internal fault are provided by our latest
protection scheme: “
matched loads; general overheating; DC;
high-frequency overloads,and protection from
full internal fault are provided by our latest
protection scheme: “
Quad-Mute.
”
•
Three Year No-Fault Full Warranty completely
protects your investment and guarantees its
specifications.
protects your investment and guarantees its
specifications.
4-ohm Dual (per ch.)
1 kHz
Power
490W
305W
460W
975W
915W
460W
295W
455W
935W
70-V Parallel-Mono
8-ohm Bridge-Mono
70-V Dual (per ch.)
8-ohm Dual (per ch.)
*1 kHz Power: refers to maximum average power in watts
at 1 kHz with 0.1% THD.
at 1 kHz with 0.1% THD.
**20 Hz–20 kHz Power: refers to maximum average power
in watts from 20 Hz to 20 kHz with 0.1% THD.
in watts from 20 Hz to 20 kHz with 0.1% THD.
CT-810
*
20 Hz–20 kHz
Power
**
920W
905W
140-V Bridge-Mono
C O M - T E C H
®
S E R I E S