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Crown Audio 28M - Rack-Mountable 8 x 2 Preamplifier/Mixer
The 28M, part of the Commercial Audio Series from Crown Audio, is a rack-mountable preamplifier/mixer ideal for use in factories, schools, hospitals, restaurants, offices, and other venues. It features eight mic/line inputs with stereo RCA jacks and balanced phoenix-type connectors and two outputs with balanced phoenix-type connectors. Priority muting is included for paging.
Individual volume, bass, and treble controls are provided for each input. LED signal indicators are provided for each input and the output. A built-in tone generator provides bell, pre-announce chime, alert, and evacuate tones.
Crown Audio 28M - Rack-Mountable Preamplifier/Mixer Specifications:
- Frequency Response (at line out): 20Hz to 20kHz+/-1dB
- Signal to Noise Ratio (master volume at minimum): 100dB
- THD: less than 0.01% at rated output at 1kHz
- Input Sensitivity (volts RMS for full output at maximum gain)
- Balanced mic inputs: 3mV
- Balanced line inputs: 800mV
- RCA connectors: 400mV
- Input Impedance (nominal)
- Mic: 400 ohms
- Line: 100 kilohms
- RCA: 50 kilohms
- Crosstalk (all controls at "10"): -50dB at 1kHz
- Line Output Level (nominal): 1V into 10 kilohms
- Phantom Power: 15 VDC
- Dimensions (W x H x D): 19" x 1.7" x 10.7"