Samson MD1 Pro 1-Channel Passive Instrument Direct Box

3-Way Attenuator for Any Source

The MD1 Pro Mono Passive Direct Box combines premium sound circuitry with durable, road-ready construction to provide a high-quality solution for line, instrument, and speaker-level signals. The MD1 Pro allows you to send balanced line signals from your instrument over long distances without introducing noise.

To The Max

The MD1 Pro's Thru jack allows you to send the input signal to an amplifier or monitor without affecting the original audio. This can eliminate the need for miking guitar amplifiers, especially in setups that use in-ear monitoring systems.

Clean, Clear Signal

The MD1 Pro features Samson's STLX Mu-Metal shielded transformer, delivering an extended, flat frequency response with ultra-low distortion and excellent protection against hum and RF interference. Its balanced output provides a clean signal that is less susceptible to noise, making it ideal for longer cable runs. The unit also includes a 3-position attenuation switch (0dB, -15dB, -30dB) for handling line- and speaker-level signals.

Roadworthy Construction

Built with a rugged 14-gauge steel chassis, the MD1 Pro is designed to withstand demanding touring environments. Its durable enclosure protects all internal components, switches, and solder joints to ensure reliable, noise-free performance.

Features

• All-metal, impact-resistant design
• Samson STLX Mu-Metal shielded transformer
• 3-position attenuation switch: 0dB / -15dB / -30dB
• Ground Lift switch
• 1/4" Input and Thru connections
• Balanced XLR output
• No phantom power or batteries required
• 18Hz–40kHz frequency response

Overview

The MD1 Pro is the next generation of Samson's affordable and rugged S-Max direct boxes. Its custom STLX transformer reproduces bass guitars, synthesizers, and other low-frequency sources with exceptional detail and ultra-low distortion, while Mu-Metal shielding helps prevent hum and radio-frequency interference. Whether re-amping guitars in the studio or sending an acoustic instrument to front-of-house, the MD1 Pro delivers professional performance at an excellent value.

Specifications

• Type: Passive Direct Box
• Channels: 1
• Pads: -15dB, -30dB
• Ground Lift: Yes
• Input: 1 x 1/4"
• Outputs: 1 x Balanced XLR, 1 x 1/4" Thru
• Height: 1.95" (4.95 cm)
• Width: 3.38" (8.59 cm)
• Depth: 5" (12.7 cm)
• Weight: 1.47 lbs (0.67 kg)