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Rolls DU30b Audio Ducker with Microphone Preamp

BH #RODU30B • MFR #DU30B
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Rolls DU30b Audio Ducker with Microphone Preamp
Key Features
  • For Small Clubs/Restaurants/Stores
  • For Voice Paging over Backgrounds
  • Easy to Use
  • 2 RCA Inputs for Music
The easy-to-use Rolls DU30b Audio Ducker with Microphone Preamp is designed for small clubs, restaurants, or stores where voice paging is required to be heard over background music.
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$109.00
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Rolls DU30b Overview

The easy-to-use Rolls DU30b Audio Ducker with Microphone Preamp is designed for small clubs, restaurants, or stores where voice paging is required to be heard over background music.

The unit inputs the music source via a pair of RCA inputs, while the microphone is connected via an XLR input that can supply +12V phantom power. If another source other than voice needs to control the ducking, that can be brought into the unit on additional RCA jacks.

The microphone input has a pad in case the microphone being used has a high output. The sensitivity control of the DU30b sets the threshold at which the microphone will duck the music, and a mic level knob controls the volume of the microphone input.

Audio ducker for small clubs, restaurants, or stores
Very easy to use
2 RCA inputs for music, 1 XLR mic input with level knob for volume control and +12V phantom power
Microphone pad switch to temper high-output mic levels
UPC: 675889000306

Rolls DU30b Specs

Number of Channels
1
Inputs
1 x XLR Microphone
1 x 2RCA Line In
1 x 2RCA Aux In
Output
1 x 2RCA Line Out
Multi Function
No
Gain Range
Not Specified by Manufacturer
Maximum Output Level
Not Specified by Manufacturer
Frequency Response
20 Hz to 40 kHz
Noise
Noise Floor -78 dBu
Dimensions
4 x 4 x 1.5" / 10.1 x 10.1 x 3.8 cm
Weight
1 lb / 453 g
Specialties
A Repeating Announcement on Prerecorded Media Can Be Used as a Trigger via the "Aux Input"
Packaging Info
Package Weight
1.1 lb
Box Dimensions (LxWxH)
7 x 4.7 x 2.6"

Rolls DU30b Reviews

Does what it claims...

By Matt
Rated 5 out of 5
Date: 2026-04-30

Simple setup and easy to tune sensitivities. Installed it in-between a computer and amps running background music in a business, connected up a wireless microphone so they can use the setup as a PA. Cuts off the music perfectly when speaking into the mic.

This product works great

By Howselp
Rated 5 out of 5
Date: 2015-09-02

Easy to use and worKS great

See any errors on this page?

Does this work with a Bluetooth adapter line in ...

Does this work with a Bluetooth adapter line in signal?
Asked by: JAMES
Yes you can go from the line output of the Rolls DU30b into a bluetooth transmitter.
Answered by: David M
Date published: 2023-05-05

Can the ducker completely mute the signal when ...

Can the ducker completely mute the signal when another signal is detected?
Asked by: Eduardo
Yes, to mute the mic level audio when another signal is detected, turn the Duck Sensitivty knob on the Rolls DU30b Audio Ducker with Microphone Preamp all the way over (clockwise).
Answered by: David M
Date published: 2025-10-28
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