Rolls DU30B
Mic Preamp / Audio Ducker


Our Price: $80.00
List Price: $105.00
You save 24%! (Low Price Guarantee)
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The DU30b is a microphone preamp and background music preamp. When an announcement is made into the microphone, the music is automatically “ducked” under the announcement. Then the music is brought back to it’s previous level.


  • Automatically ducks music under announcements
  • Perfect for restaurants and small clubs
  • Clean, Quiet Mic Preamp


  • Frequency Response: 20 Hz - 40 kHz
  • Input Impedance: 100K Ohms unbalanced, 600 Ohms balanced
  • THD + Noise: <0.03% typical
  • Noise  Floor: -78 dB
  • Indicators: Power LED
  • Input/Output jacks: XLR balanced output, RCA unbalanced input and output
  • Power: 12 - 16 VDC 50mA, 5 x 1.2 mm DC Jack - Center Negative
  • Dimensions: 4" x 4" x 1.5"
  • Weight: 1 lb. (0.5 kg)

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