Crown 660A Power Amplifier

The Crown 660A is a six-channel amplifier for commercial and industrial audio. It provides 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.

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.


Crown 660A Commercial Grade Amplifier Features :

• 660A has six inputs and six 60W ( into 4 Ohms) Power Amplifier channels for multi-zone systems. It can drive different types of speakers in different areas of a facility. Ideal for commercial and industrial use
• 4-ohm, 70V or 100V operation on channels 1-4, 4-ohm operation on channels 5 and 6
• Independent volume, bass (100Hz) and treble (10kHz) controls
• Frequency Response (at line out) 20Hz to 20kHz
• 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
• Includes detachable rack ears with screws, non-touch cover for output connectors, spade lugs, Phoenix-type connectors and power cord
• Three-Year, No-Fault, Fully Transferable Warranty completely protects your investment and guarantees its specifications

Crown 660A Commercial Grade Amplifier Applications :

• 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.
• Can be used for 5.1 channel home theater

Crown 660A Commercial Grade Amplifier Specifications :

• 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.

Front Panel Controls and Indicators :

• Power Switch: Pushbutton on-off switch. The power switch does not affect the 24V DC auxiliary power input.
• 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.
• 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 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.
• 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.

Crown 660A Construction :

• Cooling: Convection Cooled
• Front Panel: Cast aluminum with integrated handles.
• Protection: Amplifier is protected against reactive loads, faults and shorts. If one channel experiences a catastrophic failure, the entire amplifier will shut down.
• Dimensions w/ Rack Ears (W x H x D): 19" x 3.5" x 12.2"
• Weight: 30.3 lbs net, 36 lbs shipping