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Samson’s S-Max Direct Boxes combines premium sound circuitry with durable, roadworthy
construction to provide high-quality signal connection solutions for live and studio applications. The
Samson MDA1 Mono Active Direct Box offers a variety of DI solutions for live sound and recording
applications. You can connect all kinds of audio signals like those from keyboards, drum machines,
mixers, guitars, and outboard signal processors.
Unlike passive direct boxes, the MDA1 is active, which means it has a power supply, so you can rely
on an even frequency response on any audio signal you connect to regardless of its output impedance.
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 balanced output provides a
clean signal, that is less susceptible to noise when compared to an unbalanced cable, which allows for
running longer lengths of cables. Another benefit from a balanced connection is CMR (Common Mode
Rejection), which provides cancellation of interference (hums and buzzes), while leaving the original
signal pure.
With proper care and maintenance, your MDA1 will operate trouble-free for many years. Should
your direct box ever require servicing, a Return Authorization (RA) number must be obtained before
shipping your unit to Samson. Without this number, the unit will not be accepted. Please visit
www.samsontech.com/ra for an RA number prior to shipping your unit. Please retain the original
packing materials and, if possible, return the unit in its original carton. If your MDA1 was purchased
outside of the United States, contact your local distributor for warranty details and service information.
Introduction