Crown Com-Tech CT-1600 User manual

@crown®Professional Power Amplifier Quick Reference
Com-Tech®Series
INTRODUCTION
The Com-Tech Series of Crown am-
plifiers are designed to provide high
power with extremely low distortion
for use in audio applications. These
amplifiers are designed with the pro-
fessional in mind. Crown guarantees
to meet or exceed its published
specifications and backs them up
with a 3 Year Full No Fault Warranty.
For a standard cut-sheet please con-
tact our literature department (1-800-
342-6939/1-219-294-8200).
CT-200 OUTPUT POWER
110W/Ch 8 Ohms
155W/Ch 4 Ohms
305W Bridged Mono 8 Ohms
225W Parallel Mono 4 Ohms
315W Parallel Mono 2 Ohms
105W/Ch 70V 50 Ohms
210W Bridged Mono 140V 100 Ohms
210W Parallel Mono 70V 25 Ohms
CT-400 OUTPUT POWER
210W/Ch 8 Ohms
230W/Ch 4 Ohms
440W Bridged Mono 8 Ohms
425W Parallel Mono 4 Ohms
440W Parallel Mono 2 Ohms
225W/Ch 70V 25 Ohms
450W Bridged Mono 140V 50 Ohms
450W Parallel Mono 70V 12.5 Ohms
CT-800 OUTPUT POWER
305W/Ch 8 Ohms
490W/Ch 4 Ohms
995W Bridged Mono 8 Ohms
600W Parallel Mono 4 Ohms
835W Parallel Mono 2 Ohms
450W/Ch 70V 12.5 Ohms
900W Bridged Mono 140V 25 Ohms
900W Parallel Mono 70V 6.2 Ohms
CT-1600 OUTPUT POWER
540W/Ch 8 Ohms
875W/Ch 4 Ohms
1720W Bridged Mono 8 Ohms
1080W Parallel Mono 4 Ohms
1750W Parallel Mono 2 Ohms
890W/Ch 70V 6.2 Ohms
1780W Bridge Mono 140V 12.5 Ohm
1780W Parallel Mono 70V 3.1 Ohm
SONIC PERFORMANCE
Signal/Noise: 105 dB A-weighted
Damping Factor: >1000 From 10 to
400 Hz
Slew Rate: >13V/µSec Stereo
IMD: <0.05% At Rated Output
THD: <0.1% At Rated Output
Frequency Response: ±0.1 dB From
20 Hz to 20 kHz at 1W at 8 Ohms
Phase Response: ±10° From 10 Hz to
20 kHz
Input Impedance:20 kOhm Balanced,
10 kOhm Unbalanced
Output Impedance: <10 mOhm In Se-
ries With <2 µH
CONTROLS & INDICATORS
Front Panel: On/Off Switch, Power
Indicator, SPI Indicators, IOC Indi-
cators, ODEP Indicators
Rear Panel: Level Controls, Stereo/
Bridged Mono/Parallel Mono switch,
70V/8-4 Ohm Mode switches
Internal: Sensitivity Switch (26 dB/
0.775V 8-4 Ohm Mode/0.775V 70V
Mode Selection)
CONNECTORS
Input: Balanced Barrier Strip Stan-
dard with P.I.P.-BB, other connector
stylesavailablewithother P.I.P. mod-
ules
Output: Barrier Strip
STRUCTURAL
Weight:
CT-200: 29 lbs
CT-400: 32 lbs
CT-800: 47 lbs
CT-1600: 58 lbs
Dimensions:
CT-200/400: 3.5” x 19” x 16” (2U)
CT-800: 5.25” x 19” x 16” (3U)
CT-1600: 7” x 19” x 16” (4U)
Cooling CT-200 Only: Convection, fan
optional
CoolingCT-400/800/1600:4speedther-
mally controlled fan
AC Power: 120V 60Hz with standard
15A power plug. All models except
CT-400 may be modified to any stan-
dard world line voltage. Export ver-
sion of CT-400 is changeable, but it is
a three rack space unit.
CIRCUITRY DESIGNS
Grounded Bridge output topology
employs AB+B three-deep Darling-
ton in a four-quadrant design. Rail
voltage is not grounded at the power
supply, but by two quadrants of the
output stage. The result is voltage
control allowing maximum power
transfer to the load, but never plac-
ing more than half the output voltage
across any output transistor device.
These amplifiers also have Output
Device Emulation Protection (ODEP)
to protect the amplifier from unsafe
thermal conditions. Unlike conven-
tional thermal switches, the ODEP
circuit steps in to limit drive only as
much as necessary to protect the
output stage rather than causing an
abrupt shutdown. With ODEP, “The
Show Goes On!” Front panel indica-
tors are provided to show signal pres-
ence, IOC (distortion above 0.05%),
and ODEP status (the thermal head-
room of the amplifier). If it begins to
run out of thermal headroom the
ODEP indicators dim. After they go
out the amplifier may begin to limit
output drive to protect the amplifier
thermally. Other protective circuitry
includes slew rate limiting to prevent
RF burn-out of high frequency trans-
ducers, output current limiting, and
audio muting and high voltage shut-
down in the event of output DC or
output device failure. Another circuit
innovation is the addition of mode
switches to allow easy setup for ei-
ther 70V distribution or direct 8/4 ohm
loads.
Guaranteed Excellence
]
Crown International, Inc.
PO Box 1000 Elkhart, IN 46515-1000
Ph. 800-342-6939/219-294-8200
Fax. [phone]
Trademark Notice:
Crown
®
and Com-Tech
®
are registered trade-
marks of Crown International Inc.

@crown®Power Amplifier Quick Reference
Com-Tech Calculated Data
tion of efficiency at 65%. Information
is only provided for the purpose of
getting an idea of current draw and
heat produced. Actual performance
will vary depending on environment,
program material, load, signal, and
AC mains voltage and frequency. Val-
ues of calculated AC mains current
draw are intended to represent aver-
age draw corresponding to the ther-
mal breaker requirements that should
be met. Peak current draw with dy-
namic program material may be sig-
nificantly higher. Thermal information
is provided to assist with calculating
air conditioning needs. The above
data should not be construed as
specifications.
The information provided on this
page is calculated data based on
driving both channels to rated out-
put using the 1 kHz Maximum Aver-
age Power rating method. Other pa-
rameters used in calculation include
a conservative idle current estimate
of 90 Watts (assumes maximum fan
speed) and a conservative estima-
Program
Material
Continuous Speech
Acoustic Music
Full Range Music
Compressed Music
Pink Noise
Waste Heat
(BTU/Hr)
370
420
480
540
600
Current Draw
at 100VAC
1.7A
2.3A
2.8A
3.4A
4.0A
Current Draw
at 120VAC
1.4A
1.9A
2.4A
2.8A
3.3A
Current Draw
at 220VAC
0.8A
1.0A
1.3A
1.6A
1.8A
Current Draw
at 240VAC
0.7A
1.0A
1.2A
1.4A
1.7A
CT-200 Worst Case Load: 4 Ohm/Ch
Program
Material
Continuous Speech
Acoustic Music
Full Range Music
Compressed Music
Pink Noise
Waste Heat
(BTU/Hr)
390
480
560
650
730
Current Draw
at 100VAC
2.0A
2.8A
3.7A
4.5A
5.4A
Current Draw
at 120VAC
1.6A
2.4A
3.1A
3.8A
4.5A
Current Draw
at 220VAC
0.9A
1.3A
1.7A
2.1A
2.5A
Current Draw
at 240VAC
0.8A
1.2A
1.6A
1.9A
2.3A
CT-400 Worst Case Load: 4 Ohm/Ch
Program
Material
Continuous Speech
Acoustic Music
Full Range Music
Compressed Music
Pink Noise
Waste Heat
(BTU/Hr)
500
675
850
1025
1200
Current Draw
at 100VAC
2.9A
4.7A
6.4A
8.4A
10.2A
Current Draw
at 120VAC
2.4A
4.0A
5.5A
7.0A
8.5A
Current Draw
at 220VAC
1.3A
2.2A
3.0A
3.8A
4.7A
Current Draw
at 240VAC
1.2A
2.0A
2.8A
3.5A
4.3A
CT-800 Worst Case Load: 4 Ohm/Ch
Program
Material
Continuous Speech
Acoustic Music
Full Range Music
Compressed Music
Pink Noise
Waste Heat
(BTU/Hr)
650
975
1300
1625
1950
Current Draw
at 100VAC
4.4A
7.7A
11.0A
14.3A
17.6A
Current Draw
at 120VAC
3.7A
6.4A
9.2A
11.9A
14.7A
Current Draw
at 220VAC
2.0A
3.5A
5.0A
6.5A
8.0A
Current Draw
at 240VAC
1.9A
3.2A
4.6A
6.0A
7.4A
CT-1600 Worst Case Load: 70V Mode