Mackie MDB-1A, Active Direct Box
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.
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Product Specifications:
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
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: 1.5 x 3.4 x 5.8″ / 38 x 86 x 147 mm
Weight: 0.8 lb / 0.4 kg
