esigned from the ground up exclusively Dfor the professional sound contractor,
Com-Tech®offers incredible features, flexibility, and the best long-term value in 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.
In a profession where unplanned service 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.
| Features | • IOC® (Input/Output Comparator) circuitry im- |
| • Unique power supply allows channels to be | mediately alerts of any distortion exceeding |
| independently operated in either 70-V or 8/4- | 0.05%, providing dynamic proof of distortion- |
| ohm mode. | free performance. |
| • Remote feature allows amplifier to be turned | • Enhanced PIP2™ (Programmable Input Pro- |
| on and off from a remote location by adding | cessor) connector accepts new accessory |
| an optional R.S.V.P. accessory. | modules that tailor the amplifier to suit spe- |
| • Crown’s Grounded Bridge™ design delivers | cific applications. |
| • Full protection from shorted, open and mis- |
| large voltage swings without using easily |
| stressed output-transistor configurations like | matched loads; general overheating; DC; |
| conventional amplifiers. The results are | high-frequency overloads,and protection from |
| lower distortion and superior reliability. | full internal fault are provided by our latest |
| • Patented ODEP® (Output Device Emulation | protection scheme: “Quad-Mute.” |
| • Three Year No-Fault Full Warranty completely |
| Protection) circuitry compensates for over- |
| heating and overload to keep the amplifier | protects your investment and guarantees its |
| working when others would fail. | specifications. |
| | |
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.
Power
Output Power
CT-810 | *1 kHz | **20 Hz–20 kHz |
Power | Power |
4-ohm Dual (per ch.) | 490W | 460W |
8-ohm Dual (per ch.) | 305W | 295W |
70-V Dual (per ch.) | 460W | 455W |
8-ohm Bridge-Mono | 975W | 935W |
70-V Parallel-Mono | 915W | |
140-V Bridge-Mono | 920W | 905W |
*1 kHz Power: refers to maximum average power in watts 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.
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.
Voltage Gain to 1 kHz, 8-ohm rated output; 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;
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.
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.
Performance
Frequency Response: ±0.1 dB from 20 Hz to
20 kHz at 1 watt.
Phase Response: ±10 degrees from 10 Hz to 20 kHz at 1 watt.
Signal-to-Noise Ratio,A-weighted: Better than
105 dB below rated 1 kHz power.
Total Harmonic Distortion (THD): 1 kHz rated 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.
Damping Factor: Greater than 1,000 from 10 Hz to 400 Hz.
Controlled Slew Rate: (Slew rates are limited 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.
Level: A 21-position detented back-panel 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.
Dual/Mono: A three-position back-panel 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.
Indicators
Enable: An amber front-panel LED that shows 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.
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.
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.
