The Rolls 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.
Warranty: 12 Months
Frequency Response: 20 Hz - 40 kHz
Input Impedance 100KΩ unbalanced, 600 Ω balanced
THD + Noise: <0.03% typical
Noise Floor: -78 dB
Indicators Power: LED
Input/Output: jacks XLR balanced input
RCA unbalanced input and output
Size: 4" x 4" x 1.5"
Weight: 1 lb. (.5 kg)
Power: 12 - 16 VDC 50mA
5 x 1.2 mm DC Jack - Center Negative
Click here to download the Rolls DU30b manual
As of 21/4/20 orders $100 and over ship FREE to most areas. Orders $49 and under Postage is $8 and Express Shipping $15. Order $50 to $99 are $15 for express shipping*. This covers one delivery attempt so please provide an address where someone is available to sign for courier delivery between 9am and 5pm weekdays. You can instruct us to ask the courier to leave your parcel unattended in a safe place, although please be aware that if anything happens to the parcel, neither us nor the courier company can be held responsible. Work addresses are a great delivery option. If using a work address please include the business' name.
* for some larger items does not apply to Australian remote island locations, some mainland remote locations (outside Darwin NT and Perth WA metro areas) or outside Australia. If unsure if you are entitled to capped shipping it is best to contact us prior to placing order.