Markertek - The Future of Broadcast Supply

Call 800-522-2025
M-F 8:30am - 7pm EST

Free Shipping Promo Box

FREE SHIPPING No Minimum Order!

SHOP MARKERTEK EVERYDAY for all of your needs. Free shipping on almost every order placed on our website.
Special order & oversized freight intensive items ship at an additional cost. Continental US orders only.
Ask about our new Economy International Shipping Options.

Secure LoginClose X

Returning Markertek Customers

New Markertek Customers

Why Create an Account?

Creating a Markertek account now will save you time on future orders. You'll have full access to your order history and a personalized shopping experience.

ROLLS DU30b Mic Preamp Audio Ducker
    Questions? Ask a Markertek Expert:
    800-522-2025 Email

    ROLLS DU30b Mic Preamp Audio Ducker

    Manufacturer: Rolls Corporation

    Item #: DU30B   •   MFG #: DU30B


    List Price:$105.00
    Our Price:$80.00

    free ship
    Availability: Direct Ship From Manufacturer
    Item ships directly from the manufacturer. Normal delivery time is 2-7 business days and is subject to manufacturer availability. Need it sooner? Call 800-522-2025, or email Customer Service for expedited delivery options.
    • 2 - 7 Day Normal Delivery Time - Faster Shipping Options at Checkout or Call Us.



    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.

    • Features

      • Automatically ducks music under announcements
      • Perfect for restaurants and small clubs
      • Clean, Quiet Mic Preamp
      • REAR PANEL
      • MIC IN: Female XLR jack for connection to a dynamic or condenser paging microphone.
      • PHTM PWR: Jumper for engaging the +12 volt phantom power to the microphone input - configuredOFF from the factory.
      • AUX IN: Stereo RCA jacks for connecting to a source different from the Mic In as the mastersignal.
      • LINE IN: Stereo RCA jack for connection to the stereo signal source to be "ducked" such asa tuner, CD player or cassette player.
      • OUTPUT: Stereo RCA jacks for connection to the system's amplifiers. 12 VDC: Power input. Connect to the enclosed Rolls PS27 ACadapter.


    Continue Shopping View Cart