Crown Audio Stereo Amplifier CH2 User Manual

C O N T R A C T O R S E R I E S  
CH1  
CH2  
CH4  
ooking for a quality, constant voltage and low  
impedance two channel amplifier for your res-  
taurant, nightclub, retail store, school or house  
of worship projects? The Crown® “Contractor Series”  
amplifiers are designed just for you.  
L
Features  
Drives multiple impedances, with both low  
impedance and high impedance outputs per  
channel.  
Advanced protection circuitry guards against:  
shorted outputs, open circuits, DC, mismatched  
loads, general overheating, high-frequency  
overloads and internal faults.  
CH-Series amplifiers can directly drive “constant  
voltage” lines, so you can avoid the expense of  
adding step-up transformers for distributed loud-  
speaker systems.  
High-pass filter for each channel provides  
low-frequency roll off to eliminate step down  
transformer saturation when used in 70V dis-  
tributed systems.  
Can be mounted in standard (19-inch (48.3-  
cm)) rack, shallow (14-inch (35.56-cm)) rack,  
or stacked on top of each other.  
All Contractor-Series amplifiers feature Crown’s  
exclusive SST (System Solutions Topologies) expan-  
sion system. The SST expansion system makes it  
easy to tailor your amplifier to a specific application  
or to add future technology as it develops.  
Shallow chassis design, allowing for installa-  
tion in most wall-mount racks.  
Accurate, uncolored sound with very low  
distortion for the best in music and voice repro-  
duction.  
With an incredibly wide range of power and fea-  
ture/benefits, Contractor-Series amplifiers give the  
professional sound contractor more options. Crown  
quality is available at the best dollar-per-watt ratio on  
the market.  
Rear panel detented level controls allow for  
accurate level settings and secure operation.  
Three-Year, No-Fault, Fully Transferable War-  
ranty completely protects your investment and  
guarantees its specifications.  
“Contractor-Correct” barrier strip output con-  
nectors allow for quick and easy connection,  
regardless of the load.  
Crown’s Profit Protection Plan guarantees quick,  
no-questions-asked replacement of your covered  
Contractor Series amplifier should it fail at any  
time up to 6 months following date of installation.  
For more details about the Crown Contractor Series,  
contact the Crown Technical Support Group at 800-  
342-6939 or 574-294-8200. Also, visit the Crown  
Specifications  
Voltage Gain, 1 kHz, 1.4V sensitivity:  
Performance  
Frequency Response, 20 Hz to 20 kHz at 1 watt: 0.1  
dB (CH1, CH2) or 0.25 dB (CH4).  
Note: All measurements apply to amplifiers in stereo  
mode with 8 ohm loads and an input sensitivity of 26  
dB gain, 1 kHz at rated power unless other otherwise  
specified. Specifications for units supplied outside  
the U.S.A. may vary slightly at different AC voltages  
and frequencies.  
30.5 dB (CH1) or 32.1 dB (CH2) or 34 dB (CH4)  
at 8 ohms.  
34 dB (CH1) or 34 dB (CH2) or 34 dB (CH4) at  
70V.  
Phase Response: 15 degrees deviation from linear  
phase from 20 Hz to 20 kHz at 1 watt.  
AC Line Requirements:  
Note: North American units are 60 Hz only. All other  
models are 50/60 Hz. Voltages are 10%.  
Signal to Noise Ratio, A-Weighted: Better than 105  
dB (CH1, CH2) or 102 dB (CH4) below rated 1-kHz  
power.  
Power  
Output Power: See power charts below.  
AC Line Current:  
Total Harmonic Distortion (THD), 1 kHz at rated  
power: 0.5% or less true THD from 20 Hz to 20 kHz.  
Load Impedance:  
100V: 7.6A (CH1) or 11.4A (CH2) or 8.5A (CH4).  
120V: 6.3A (CH1) or 9.5A (CH2) or 7.1A (CH4).  
230-240V: 3.5A (CH1) or 5.0A (CH2) or  
3.7A (CH4).  
Safe with all types of loads.  
4 and 8 ohm Stereo.  
16 ohm (CH1) or 8 ohm (CH2) or 4 ohm (CH4) at  
70V Stereo.  
4, 8 and 16 ohm Bridge.  
32 ohm (CH1) or 16 ohm (CH2) or 8 ohm (CH4) at  
140V Bridge.  
64 ohm (CH1) or 32 ohm (CH2) at 200V Bridge.  
Intermodulation Distortion (60 Hz and 7 kHz at 4:1):  
Less than 0.1% (CH1, CH2) or 0.5% (CH4) at rated  
power to 30 dB below rated power at 8 ohms.  
AC Line Connector: Detachable 15A IEC connector  
with country-specific plug.  
Damping Factor (8 ohm): Better than 400 (CH1, CH2)  
or 700 (CH4) from 10 Hz to 400 Hz.  
Crosstalk, 20 Hz to 20 kHz: Better than 50 dB below  
rated power.  
Common Mode Rejection (CMR): Better than 40 dB  
from 20 Hz to 1 kHz.  
DC Output Offset (shorted Input): < 10 mV.  
*1 kHz  
Power  
CH4  
1,400W**  
2 ohm Stereo (per channel)  
*1 kHz  
Power  
*1 kHz  
Power  
1,200W  
600W  
4 ohm Stereo (per channel)  
8 ohm Stereo (per channel)  
70V Stereo (per channel)  
4 ohm Bridge-Mono  
CH1  
CH2  
450W  
275W  
300W  
900W  
600W  
660W  
400W  
600W  
1,320W  
1,200W  
4 ohm Stereo (per channel)  
8 ohm Stereo (per channel)  
70V Stereo (per channel)  
8 ohm Bridge-Mono  
4 ohm Stereo (per channel)  
8 ohm Stereo (per channel)  
70V Stereo (per channel)  
8 ohm Bridge-Mono  
1,200W  
2,800W**  
2,400W  
2,400W  
8 ohm Bridge-Mono  
140V Bridge-Mono  
140V Bridge-Mono  
140V Bridge-Mono  
*1 kHz Power: refers to maximum average power in watts  
at 1 kHz with 0.5% THD.  
*1 kHz Power: refers to maximum average power in watts  
at 1 kHz with 0.5% THD.  
*1 kHz Power: refers to maximum average power in watts  
at 1 kHz with 0.5% THD.  
**200V line voltage provides 1800W (2 ohm stereo)  
and 3600W (4 ohm bridge-mono).  
 

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