The Crown 180A, 280A, 1160A and 660A are high-value amplifiers for commercial and industrial audio. They provide 4-ohm and constant-voltage outputs (70V and 100V). The 660A, a six-channel amplifier, provides 4-ohm and constant-voltage outputs (70V and 100V) on channels 1 through 4, and 4-ohm outpus on channels 5 and 6. The amps are 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.

Some applications include schools, hospitals, factories, restaurant/retail, houses of worship, fitness facilities, A/V boardrooms, prisons, and small offices. Typical uses are paging, background music, security and evacuation instructions.

The amplifiers vary in their number of inputs, number of outputs, and power range:

• 180A has 1 input and one 80W power amplifier for single-zone systems.
• 280A has 2 inputs and dual 80W power amplifiers for two-zone systems.
• 1160A has 1 input and one 160W power amplifier for single-zone systems.
• 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.

Features:

• 180A, 280A and 1160A have 1 or 2 inputs, 1 or 2 amplifier output channels. 660A has six inputs and six amplifier output channels
• 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, circuit breaker/fuse, and thermal protection
• Three-Year, No-Fault, Fully Transferable Warranty completely protects your investment and guarantees its specifications

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.
• Crosstalk (all controls at “10”): –70 dB at 1kHz.
• Line Output Level (nominal): 1V into 10 kilohms.
• AC Line Voltages Available:
  • 100V 50/60 Hz
  • 120V 60 Hz
  • 220V 50/60 Hz
  • 230V 50/60 Hz
  • 240V 50/60 Hz
• 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. The power switch does not affect the 24V DC auxiliarypower input.
• Power Indicator: Blue LED indicates power on.
• Output Signal Presence Indicator: Green LED, one for each output channel, illuminates whenoutput 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.
• Master Volume Controls: One per output channel. Detented potentiometer with knob.
• Tone Controls: Bass and Treble non-detented potentiometers on each channel. Bass ±10 dB at100 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.
• AC Power Inlet: Detachable IEC.
• Auxiliary Power Input (not in 660A): 2-position terminal strip for 24 VDC (±10%) backup power. Accepts up to 14 AWG terminal forks.
• Amplifier Outputs Connectors: One per channel, 4-position terminal strip with COM (Common), 4 ohms, 70V and 100V terminals. Accepts up to 10 AWG terminal forks. Non-touch cover included.
• Output VCA Connector: One for every two channels, 4-pin Phoenix-type connector for two VCA control lines of 10 VDC and ground. Compatible with Crown 1-VCAP and 4-VCAP modules.
• Line Out Connector (not in 660A): One 3-pin balanced Phoenix-type connector per output channel. Post master, pre-VCA. Level controlled by master volume control.
• Amp Input Connector: 3-pin Phoenix-type, high-impedance balanced, one per amplifer channel.

Cooling

• Convection cooled.

Protection

• Current Limit Protection: Included.
• Thermal Limit Protection: Over-temperature thermal cutout.
• DC-Fault Load Protection: Included.

Included Accessories

• Power cord
• Detachable rack ears
• Screws for rack ears
• Non-touch cover for output connectors
• Phoenix-type connectors
• Spade lugs

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 backof non-touch cover.
• Weight
  • Net Weight:
  • 180A: 21.0 lb (9.5 kg)
  • 280A: 25.3 lb (11.5 kg)
  • 1160A: 25.3 lb (11.5 kg)
  • 660A: 30.3 lb (13.7 kg)
  • Shipping Weight:
  • 180A: 26.0 lb (11.8 kg)
  • 280A: 30.3 lb (13.7 kg)
  • 1160A: 30.3 lb (13.7 kg)
  • 660A: 35.3 lb (16.0 kg)