When would you use a direct box like the MDB-1A?

Direct boxes connect high-impedance instruments to microphone preamps or mixing consoles that expect balanced, low-impedance signals.

What instruments work with the MDB-1A?

It is designed for guitars, bass guitars, keyboards, synthesizers, and other instrument outputs that produce high-impedance signals.

What is the purpose of the -20 dB pad?

The pad attenuates strong signals from instruments with very high output levels, preventing clipping and distortion.

What does the ground-lift switch do?

The ground-lift switch eliminates hum caused by ground loops between your instrument, amplifier, and audio interface.

How does polarity control improve signal integrity?

Polarity control lets you reverse the phase of the signal, helping eliminate phase cancellation issues when combining signals.

What is the purpose of the 120 Hz high-pass filter?

The high-pass filter removes subsonic rumble and low-frequency noise, leaving only the musical content from your instrument.

Can the MDB-1A be delivered to facilities across the UAE and GCC?

Yes, Procure.ae supplies the MDB-1A across the UAE and GCC on a request-a-quote basis; contact for delivery timelines.

Does setup require any special configuration?

The MDB-1A is ready to use upon arrival; contact Procure.ae if you need guidance on connections or feature operation.

What connections and warranty apply?

It features professional XLR connectivity; contact Procure.ae to confirm included cables and warranty coverage.

Mackie MDB-1A Active Direct Box for Instruments

Name: Mackie MDB-1A Active Direct Box for Instruments
Brand: Mackie
SKU: MDB-1A

The Mackie MDB-1A is a phantom-powered active direct box designed to connect high-impedance instruments (guitar, bass, keyboard) to balanced microphone inputs. Features include -20 dB pad, ground-lift switch, polarity control, and 120 Hz high-pass filter for clean, noise-free signal conversion.

Overview

The Mackie MDB-1A is a professional-grade active direct box engineered for seamless integration of high-impedance instruments into balanced microphone preamp chains. Suitable for studio recording, live sound reinforcement, and houses of worship, the MDB-1A transforms unbalanced instrument-level signals into low-impedance, mic-level balanced outputs ready for any mixing console.

Key Features

Converts single high-impedance 1/4" TS instrument input to low-impedance balanced XLR 3-pin mic output
Active design powered by phantom power (48 V) for transparent, low-noise signal conditioning
-20 dB pad reduces input level, preventing distortion from high-output instruments
Ground-lift switch eliminates hum caused by ground loops in studio and live installations
Polarity switch corrects phase relationships when combining DI'd signals with microphone tracks
120 Hz high-pass filter removes unwanted rumble and mechanical noise
1/4" thru jack allows simultaneous connection to amplifier or pedalboard without signal loss
Merge function enables the thru jack to serve as a second input for dual-source operation
Sturdy steel chassis withstands rigorous studio and road use

Specifications

Input: 1 × 1/4" TS Unbalanced (High-Impedance)
Output: 1 × XLR 3-pin Balanced (Mic-Level)
Thru Output: 1 × 1/4" TS for Amplifier/Pedalboard Routing
Impedance Conversion: High-Z to Low-Z (Mic-Level)
Pad: -20 dB
High-Pass Filter: 120 Hz
Power: Phantom Power (48 V)
Controls: Polarity, Ground-Lift, Pad, Merge Switch
Weight: 0.36 kg
Color: Black
Country of Origin: United States

Why buy from Procure.ae

Procure.ae supplies studio and live sound infrastructure to recording facilities, venues, and production companies throughout the UAE and GCC. Request a quote for multi-unit orders and integrated AV system support.

FAQ

Do I need phantom power for the MDB-1A?
Yes, the active design requires 48 V phantom power from your mixing console or audio interface. Most professional preamps and mixers provide this as standard.

Can I use the MDB-1A to record a loud bass amplifier?
Absolutely. Set the -20 dB pad switch and connect the instrument input to your bass amp's output. The pad prevents clipping while the 1/4" thru jack allows simultaneous amp monitoring.