Samson MDA1 Active Mono Direct Box

Guitarist? Bassist? Convert your Hi-Z instrument to a Lo-Z balanced XLR signal with this active DI box. Samson's MDA1 runs on a 9V battery or phantom power.

Samson's MDA1 Mono Active Direct Box combines premium sound circuitry with durable, roadworthy construction, providing high-quality signal connection solutions for live sound and recording studio applications. The MDA1 operates on either batteries or phantom power and allows clean, balanced lines to be sent from your guitars and basses.

Active Operation

The active MDA1 provides an even frequency response on any audio signal you connect to regardless of its output impedance. As such, the MDA1 is ideal for connecting instruments with passive pickups, which have very high impedances, by preserving the top end of the instrument's frequency response. The MDA1's balanced output provides a clean signal that is less susceptible to noise than an unbalanced line, allowing for longer cable runs. In addition, a 2-position 0dB/-15dB attenuation switch lets you adapt the MDA1 to a wide variety of signals.

Thru Jack

The MDA1'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 steel chassis, the MDA1 is built to withstand the abuse of the most demanding live tours. Its rigid outer shell protects all the MDA1's internal connections, switches and solder joints from failure, ensuring quiet, reliable performance.


read more - All-metal, impact resistant design
- 2-position 0dB/-15dB attenuation switch
- Ground Lift switch
- 1/4" Input and Thru
- Balanced XLR output
read less

- 48V Phantom and 9V Battery power options
- Frequency response of 18Hz-35kHz
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 1.5 lbs
Shipping Dimensions: 6 x 4 x 2 in
Manufacturer Part Number (MPN): SAMDA1

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

Reviewers gave this product an overall rating of 4.5 out of 5 stars. (1 ratings)
Submitted November 29, 2017 by Hugh Manitee in Redding, CA
"You dont have one?"
Overall: 4.5 out of 5 stars
Verified Customer zZounds has verified that this reviewer made a purchase from us.
It is heavy. It works. It has a balanced output powered by phantom menace power. Makes the direct in tone of my bass and my geehtar sing. I love it. You still have'nt ordered one???
Ease of Use
There is almost an immediate abity to use. The most novice home audio recording setup can be direct in with the plug in of an xlr cable to a soundcard with phantom power.
It is very well made however when it arrived i noticed the case needed to be tightened a bit.The battery housing is also the only other thing made of plastic. Although it does run on phantom power so I figure It doesent matter.
Manufacturer Support
I have not yet made contact.
The Wow Factor
It is very appealing very suprised at what arrived at my home.
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