Mackie MDB-2P Stereo Passive Direct Box

Stereo Passive Direct Box

The Mackie MDB-2P is a stereo passive direct box designed to connect two mono instruments or a single stereo instrument to microphone preamps for musicians and audio engineers in recording sessions, houses of worship, and live stage applications. It converts high-impedance, instrument-level signal via its 1/4" TS unbalanced inputs to low-impedance, mic-level outputs via balanced XLR 3-pin jacks. Two 1/4" TS thru jacks allow simultaneous connection to amplifiers or pedalboards.

Each channel offers a -15 dB pad for reducing the input level to prevent distortion when using a high-gain source. The ground-lift switch inhibits hum caused by ground loops. Due to passive design principles, the MDB-2P requires no batteries or power supply. Its sturdy steel chassis enables confident use in the studio or on the road.

Features:

• Connect two mono instruments such as guitars or basses or a stereo instrument such as a keyboard to microphone preamps
• Converts high-impedance, unbalanced 1/4" TS inputs to low-impedance, balanced XLR mic-level outputs
• 1/4" thru jacks for routing to amplifiers or pedalboards
• Per-channel -15 dB pad prevents overloading when accepting signal from a loud source
• Ground-lift switch minimizes hum
• Passive design requires no batteries or power supply

Specifications:

• Type: Passive
• Input Connections: 2 x 1/4" TS unbalanced
• Output Connectors: 2 x 1/4" TS unbalanced
• 2 x XLR 3-pin balanced
• Input Impedance: 140 kOhms unbalanced
• Output Impedance: 400 Ohms unbalanced
• Impedance Ratio: 350:1
• Pad: -15 dB
• Controls: 2 x pad switches
• 1 x ground-lift switch
• Frequency Response: 20 Hz to 20 kHz (±0.2 dB)
• Dynamic Range: 128 dB
• Total Harmonic Distortion: 0.002% from 1 kHz
• Power Requirement: None
• 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