The 28M has 8 inputs and 2 output channel.

Crown's Commercial Audio mixers deliver legendary Crown quality to the commercial audio industry. These high-value mixers are designed for use in a wide range of commercial applications including schools, hospitals, factories, restaurant/retail, houses of worship, fitness facilities, A/V boardrooms, prisons, and small offices. Easily configured for a range of uses such as paging, background music, security, and evacuation instructions, Crown's Commercial Audio units are the smart choice for commercial sound.

Features

• Ideal for commercial and industrial use
• Expandable by adding Crown Commercial Audio Seriesamplifiers or mixer-amplifiers
• Balanced Phoenix-type mic/line inputs
• Any input can be sent to any output channel
• Built-in four-tone generator
• Priority muting
• Three-Year, No-Fault, Fully Transferable Warranty completely protects yourinvestment and guarantees its specifications

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"
• Weight: 8.7 lbs (net), 14 lbs (shipping)