Crown 280A Power AmplifierThe Crown 280A is a high-value amplifier for commercial and industrial audio. The 280 A provides a 4-ohm and constant-voltage outputs (70V and 100V). The Crown 280A amp is part of Crowns 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: The Crown 280A has 2 inputs and dual 80W power amplifiers for two-zone systems. Crown 280A Features: ÿ Specifications: - Frequency Response (at 1 watt from 4-ohm tap): 70Hz to 19kHz +/-1dB
- Frequency Response (at line out): 20Hz to 20kHz +/-1dB
- Power Bandwidth (at 4-ohm tap, 2 dB below maximum 1kHz power): 50Hz to 20kHz 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 1kHz
- Input Sensitivity (for full output at maximum gain): 800 mV
- Input Impedance (nominal): 100 kilohms
- Crosstalk (all controls at "10"): -70dB at 1kHz
- Line Output Level (nominal): 1V into 10 kilohms
- Minimum guaranteed power per channel into 4 ohms or 70V/100V output: 80W
- Dimensions (W x H x D): 19" x 3.5" x 12.2"
- Weight: 25.3 lbs (net), 30.3 lbs (shipping)
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