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.
Rolls DU30b Features
- Automatically ducks music under announcements
- Clean, quiet mic preamp
- Perfect for restaurants and small clubs
- DU30b mic-preamp/audio ducker1
- 15V power supply1
- Input Impedance100KΩ unbalanced, 600Ω balanced
- Frequency Response20Hz - 40kHz
- THD+Noise<0.003% typical
- Noise Floor-78dB
- Indicatorspower LED
- Input/Output JacksXLR balanced Input, RCA unbalanced input and output
- Power12 - 16 VDC 50mA, 5 x 1.2 mm DC Jack - Center Negative
- Dimensions4" x 4" x 1.5"
- Weight1 pound