Crown 660A User manual

The Crown®660A is a six-channel amplifier
for commercial and industrial audio. It pro-
vides 4-ohm and constant-voltage outputs
(70V and 100V) on channels 1 through 4, and
4-ohm outputs on channels 5 and 6.
The 660A has six inputs and six 60W power
amplifier channels for multi-zone systems. It can
drive different types of speakers in different areas
of a facility.
Some applications include schools, hospitals,
factories, restaurant/retail, houses of worship,
fitness facilities, A/V boardrooms, 5.1 surround
systems, courtrooms, and prisons. Typical uses
are paging, background music, security and
evacuation instructions.
The amp is part of Crown’s Commercial Audio
Series, which also includes mixers and mixer-
amps. These low-cost units provide all necessary
features in a simple building-block format.
The sound system can be upgraded as a facility
expands. For example, you can add more mixers
for more inputs, or add more power amps (or
mixer-amps) to handle more zones.
Specifications
Performance
Frequency Reponse (at 1 watt from 4-ohm tap):
70 Hz to 19 kHz +/- 1 dB.
Frequency Response (at line out): 20 Hz to 20
kHz +/- 1 dB.
Power Bandwidth (at 4-ohm tap, 2 dB below
maxium 1 kHz power): 50 Hz to 20 kHz with
< 0.5% THD.
Signal to Noise Ratio (ref. to rated power, master
volume at minimum): 85 dB.
DC Output Offset: < ±5 mV.
THD: Less than 0.5% at rated power at 1 kHz.
Input Sensitivity (for full output at maximum
gain): 800 mV.
Input Impedance (nominal): 100 kilohms.
Minimum Load Impedance:
100V output: 160 ohms.
70V output: 80 ohms.
4-ohm output: 4/8 ohms.
Crosstalk (all controls at “10”): –70 dB at 1kHz.
Load Impedance:
Ch. 1-4: 4 ohms and 70V/100V.
Ch. 5-6: 4 ohms.
AC Line Voltages Available:
100V 50/60 Hz
120V 60 Hz
220V 50/60 Hz
230V 50/60 Hz
240V 50/60 Hz
AC Voltage Tolerance: +10%/–20%.
Operating Temperature/Humidity: 0° C to 40° C
at 95% relative humidity (non-condensing).
Storage Temperature: –20° C to 85° C.
Front Panel Controls and Indicators
Power Switch: Pushbutton on-off switch.
Power Indicator: Blue LED indicates power on.
Output Signal Presence Indicator: Green LED,
one for each output channel, illuminates when
output signal level exceeds 100 mV (45 dB below
full power) from the 4-ohm tap.
Clip Indicators: Red LED, one per output channel.
Illuminates at threshold of audible distortion.
Volume Controls: One per output channel.
Detented potentiometer with knob.
Tone Controls: Bass and Treble non-detented
potentiometers on each channel. Bass ±10 dB at
100 Hz, Treble ±10 dB at 10 kHz.
Back Panel Controls and Connectors
Reset Switch: Resets the circuit breaker that
protects the power supply. 220/230/240V units
have a fuse instead.
Input Connectors: Detachable 3-pin Phoenix-type,
high-impedance balanced, one per channel.
AC Power Inlet: Detachable IEC.
Amplifier Outputs Connectors: One per channel,
4-position terminal strip with COM (Common), 4
ohms, 70V and 100V terminals for channels 1-4
and one 4-position terminal strip (4 ohms, + and
– for each channel) for channels 5 and 6. Accepts
up to 10 AWG terminal forks. Non-touch cover
included.
VCA Connector: Each pair of channels has a 4-pin
Phoenix-type connector for two VCA control lines
of +10 VDC and ground. Compatible with Crown
1-VCAP and 4-VCAP modules.
Cooling
Convection cooled.
Protection
Current Limit Protection: Included.
Thermal Limit Protection: Over-temperature
thermal cutout.
DC-Fault Load Protection: Included.
Turn On/Turn Off: No thumps or pops.
Included Accessories
Power cord
Detachable rack ears
Screws for rack ears
Non-touch cover for output connectors
Phoenix-type connectors
Spade lugs
COMMERCIAL AUDIO SERIES
• Six inputs, six 60W amplifier output channels;
4-ohm and 70V/100V outputs
• Ideal for commercial and industrial use
• Balanced Phoenix-type line inputs; touch-
proofed screw-terminal speaker outputs
• Advanced protection system includes
output current limiting, DC protection, cir-
cuit breaker/fuse, and thermal protection;
details available online at www.crownau-
dio.com
• Three-Year, No-Fault, Fully Transferable
Warranty completely protects your invest-
ment and guarantees its specifications
Features
1 kHz
Power
60W
Minimum guaranteed power
into 4 ohms or 70V/100V
output
660A
*1 kHz Power: refers to maximum power in watts at
1 kHz with 0.5% THD.
*
660A

Crown International
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: [phone]
FAX: [phone]FAX
www.crownaudio.com
9/07 139754-1A
Specifications subject to change without prior notice. Latest
information available at www.crownaudio.com.
Crown and Crown Audio are registered trademarks of Crown
International. Other trademarks are the property of their
respective owners. Printed in U.S.A.
© 2007 Crown Audio®, Inc.
660A back panel
Crown’s Three-Year, No-Fault, Fully Transferable Warranty
Crown offers a Three-Year, No-Fault, Fully Transferable Warranty for every new Crown amplifier-—an
unsurpassed industry standard. With this unprecedented No-Fault protection, your new Crown amplifier
is warranted to meet or exceed original specifications for the first three years of ownership. During this
time, if your amplifier fails, or does not perform to original specifications, it will be repaired or replaced
at our expense. About the only things not covered by this warranty are those losses normally covered by
insurance and those caused by intentional abuse. And the coverage is transferable, should you sell your
amplifier.
See your authorized Crown dealer for full warranty disclosure and details. For customers outside of the
USA, please contact your authorized Crown distributor for warranty information or call 574-294-8200.
660A
123456
Optional Accessories
1-VCAP remote volume control for one channel.
4-VCAP remote volume control for four channels.
Dimensions
EIA Standard 19-inch (48.3-cm) rack mount width
(EIA RS-310-B) with rack ears, 3.5-inch (8.9-cm)
height and 12.2-inch (31.0-cm) depth behind the
mounting surface (not including non-touch cover).
4.1 inches (10.5 cm) high including feet. 13.9
inches (35.2 cm) deep from front of knobs to back
of non-touch cover.
Weight
Net Weight:
30.3 lb (13.7 kg)
Shipping Weight:
35.3 lb (16.0 kg)