Mackie MDB-1A Active Direct Box

Mackie MDB-1A Active Direct Box

Mackie MDB-1A Active Direct Box

Mackie MDB-1A Active Direct Box

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Product Highlights

  • Connect an Instrument to a Mic Input
  • Converts Unbalanced to Balanced
  • Converts High Impedance to Low Impedance
  • 1/4" Unbalanced Input
  • 1/4" Thru Jack
  • XLR Balanced Output
  • Switchable Pad Prevents Overloading
  • Ground-Lift Switch Minimizes Hum
  • Merge, Low-Cut, and Polarity Switches
  • Operates on Phantom Power
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Mackie MDB-1A overview

  • 1Description

The Mackie MDB-1A is an active direct box designed to connect a single instrument such as a guitar, bass, or keyboard to a microphone preamp for musicians and audio engineers in recording sessions, houses of worship, and live stage applications. It converts a high-impedance, instrument-level signal via its 1/4" TS unbalanced input to a low-impedance, mic-level output via its balanced XLR 3-pin jack. A 1/4" thru jack allows simultaneous connection to an amplifier or pedalboard.

A -20 dB pad reduces the input level to prevent distortion when using a high-gain source, and the ground-lift switch inhibits hum caused by ground loops. Additionally, there are switches for polarity and a 120 Hz high-pass filter. The Merge function allows the Thru jack to be used as a second, simultaneous input. Due to its active design, the MDB-1A operates on phantom power. A sturdy steel chassis enables confident use in the studio or on the road.

Connect an instrument such as a guitar, bass, or keyboard to a microphone preamp
Converts a high-impedance, unbalanced 1/4" input to a low-impedance, balanced XLR mic-level output
1/4" thru jack for routing to an amplifier
-20 dB pad prevents overloading when accepting signal from a loud source
Ground-lift switch minimizes hum
Active design operates on phantom power
UPC: 663961054002
In the Box
Mackie MDB-1A Active Direct Box
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Mackie MDB-1A specs

    Type Active
    Input Connections 1 x 1/4" TS unbalanced
    Output Connectors 1 x 1/4" TS unbalanced
    1 x XLR 3-pin balanced
    Input Impedance 330 kOhms unbalanced
    Output Impedance 150 Ohms balanced
    Impedance Ratio 2200:1
    Pad -20 dB
    High-Pass Filter 120 Hz
    Controls Pad
    Ground-lift switch
    Low-cut switch
    Frequency Response 20 Hz to 20 kHz (0.5 dB)
    Signal to Noise Ratio 90 dB
    Dynamic Range 130 dB
    Total Harmonic Distortion 0.02% at 1 kHz
    Power Requirement 48 VDC phantom power
    Current <4 mA DC
    Construction Material Heavy-gauge steel chassis
    Dimensions (H x W x D) 1.5 x 3.4 x 5.8" / 38 x 86 x 147 mm
    Weight 0.8 lb / 0.4 kg
    Packaging Infozefwervf
    Package Weight 1.05 lb
    Box Dimensions (LxWxH) 6.9 x 5.8 x 2.9"

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