Crown CH3 - Manual

70V Stereo (per channel)

1 kHz
Power

1,200W

600W

1,200W

2,400W

8 ohm Bridge-Mono

4 ohm Stereo (per channel)

8 ohm Stereo (per channel)

CH4

*1 kHz Power: refers to maximum average power in watts
at 1 kHz with 0.5% THD.

*

2,400W

140V Bridge-Mono

1,400W**

2 ohm Stereo (per channel)

2,800W**

4 ohm Bridge-Mono

**

≥

200V line voltage provides 1800W (2 ohm stereo)

and 3600W (4 ohm bridge-mono).

70V Stereo (per channel)

1 kHz

Power

300W

275W

450W

900W

8 ohm Bridge-Mono

4 ohm Stereo (per channel)

8 ohm Stereo (per channel)

CH1

*1 kHz Power: refers to maximum average power in watts
at 1 kHz with 0.5% THD.

*

600W

140V Bridge-Mono

70V Stereo (per channel)

1 kHz

Power

600W

400W

660W

1,320W

8 ohm Bridge-Mono

4 ohm Stereo (per channel)

8 ohm Stereo (per channel)

CH2

*1 kHz Power: refers to maximum average power in watts
at 1 kHz with 0.5% THD.

*

1,200W

140V Bridge-Mono

CH1

C O N T R A C T O R S E R I E S

L

ooking for a quality, constant voltage and low
impedance two channel amplifi er for your res-
taurant, nightclub, retail store, school or house

of worship projects? The Crown

®

“Contractor Series”

amplifi ers are designed just for you.

CH-Series amplifi ers can directly drive “constant
voltage” lines, so you can avoid the expense of
adding step-up transformers for distributed loud-
speaker systems.

All Contractor-Series amplifi ers feature Crown’s
exclusive SST (System Solutions Topologies) expan-
sion system. The SST expansion system makes it
easy to tailor your amplifi er to a specifi c application
or to add future technology as it develops.

With an incredibly wide range of power and fea-
ture/benefi ts, Contractor-Series amplifi ers give the
professional sound contractor more options. Crown
quality is available at the best dollar-per-watt ratio on
the market.

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
Audio website at www.crownaudio.com.

Specifi cations

Note: All measurements apply to amplifi ers in stereo
mode with 8 ohm loads and an input sensitivity of 26
dB gain, 1 kHz at rated power unless other otherwise
specifi ed. Specifi cations for units supplied outside
the U.S.A. may vary slightly at different AC voltages
and frequencies.

Power

Output Power:

See power charts below.

Load Impedance:

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.

Voltage Gain, 1 kHz, 1.4V sensitivity:

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.

AC Line Requirements:

Note: North American units are 60 Hz only. All other
models are 50/60 Hz. Voltages are ±10%.

AC Line Current:

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).

AC Line Connector:

Detachable 15A IEC connector

with country-specifi c plug.

Performance

Frequency Response, 20 Hz to 20 kHz at 1 watt:

±0.1

dB (CH1, CH2) or ±0.25 dB (CH4).

Phase Response:

±15 degrees deviation from linear

phase from 20 Hz to 20 kHz at 1 watt.

Signal to Noise Ratio, A-Weighted:

Better than 105

dB (CH1, CH2) or 102 dB (CH4) below rated 1-kHz
power.

Total Harmonic Distortion (THD), 1 kHz at rated
power:

0.5% or less true THD from 20 Hz to 20 kHz.

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.

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.

Features

• Drives multiple impedances, with both low

impedance and high impedance outputs per
channel.

• High-pass filter for each channel provides

low-frequency roll off to eliminate step down
transformer saturation when used in 70V dis-
tributed systems.

• Shallow chassis design, allowing for installa-

tion in most wall-mount racks.

• Rear panel detented level controls allow for

accurate level settings and secure operation.

• “Contractor-Correct” barrier strip output con-

nectors allow for quick and easy connection,
regardless of the load.

• Advanced protection circuitry guards against:

shorted outputs, open circuits, DC, mismatched
loads, general overheating, high-frequency
overloads and internal faults.

• 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.

• A c c u r a t e , u n c o l o r e d s o u n d w i t h v e r y l o w

distortion for the best in music and voice repro-
duction.

• Three-Year, No-Fault, Fully Transferable War-

ranty completely protects your investment and
guarantees its specifi cations

.

• Crown’s Profi t Protection Plan guarantees quick,

no-questions-asked replacement of your covered
Contractor Series amplifi er should it fail at any
time up to 6 months following date of installation.

CH2

CH4