Samson MD1 Passive Mono Direct Box

Samson's MD1 mono passive direct box is a simple DI for acoustic and bass guitars, keyboards, and more with no power supply to worry about, plus a thru jack.

Samson's MD1 Mono Passive Direct Box combines premium sound circuitry with durable, roadworthy construction, providing high-quality signal connection solutions for a variety of live sound and recording applications. The MD1 allows clean, balanced lines to be sent from an unbalanced line or instrument signal (guitars, keyboards, unbalanced audio devices) to a microphone level balanced XLR input. The MD1's passive design provides full range audio by using very high quality transformers and requires no internal or external power to operate, so you get studio quality audio without the hassle of adapters, batteries, or phantom power.

Custom STL Transformer

The MD1 features Samson's STL transformer that delivers an extended, flat frequency response with ultra-low distortion. The MD1's balanced output provides a clean signal that is less susceptible to noise than an unbalanced line, allowing for longer cable runs.

Thru Jack

The MD1's Thru jack enables you to tap off the signal from the input and pass the signal to an amplifier or monitor without affecting the original audio. This can eliminate the need for miking guitar amplifiers, which depending on your application may be preferable, especially as more musicians are using in-ear monitors.

Roadworthy Construction

Housed in a 14-gauge noise-reducing steel chassis, the MD1 is built to withstand the abuse of the most demanding live tours. Its rigid outer shell protects all the MD1's internal connections, switches and solder joints from failure, read more ensuring quiet, reliable performance.


- All-metal, impact resistant design
- Samson STL transformer
- Ground Lift switch
- 1/4" Input and Thru
- Balanced XLR output
- No Phantom or Battery power required
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- Type: Mono passive direct box
- Frequency Response 18Hz to 40kHz +/-0.1dB
- Maximum Input +20dBu 0.35% THD
- Dynamic Range: >100dB @ Balanced Output
- Noise Floor: -117dB
- Total Harmonic Distortion <0.03% from 20Hz to 40kHz
- Input Impedance 400kO
- Output Impedance 250O +/-20%
- Transformer Samson STL
- Transformer Ratio 15:1
- Ground Lift Disconnects XLR pin-1 (Output)
- Connectors 1/4" unbalanced (In & Thru)
- XLR: Balanced Output
- Construction 14-gauge steel chassis
- Product Weight 1.49lb (680g)
- Box Dimensions: 5.5" x 4.25" x 2.25"
- Dimensions: 140 x 108 x 57mm
- Box Weight 1.64lb (744g)
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 1.5 lbs
Shipping Dimensions: 6 x 4 x 2 in
Manufacturer Part Number (MPN): SAMD1

For support or warranty questions, please contact the manufacturer:
Phone: 516-870-7200


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