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SDI-202 Stereo Active DI Box 
Warning 
 
 
 
 
Every person involved with the installation, operation and maintenance of this system has to: 
be qualified 
follow the instructions of this manual 
 
Description 
 
The SDI-202 provides two independent high quality active interfaces, that lets you connect instrument, 
line, or speaker level signals to a mixer or other balanced inputs. The instrument mode has a high 
impedance input, which makes it possible to connect an instrument with a high output impedance, like 
an electric guitar or acoustical guitars with a piezo-ceramic pick-up element. This mode also allows you 
to connect electric devices with an unbalanced output like a keyboard or Dj mixer. The RCA inputs are 
ideal for this kind of setup. It also has a speaker mode, which allows you to connect guitar amplifiers 
direct with the SDI-202. The SDI-202 has a very clean and neutral sound with a wide variety of signal 
sources and over long signal runs in high noise environments. The SDI-202 will provide an even frequency 
response on any input signal connected, with the benefit of cancellation of interference, hum and buzz. 
 
Jack & RCA inputs 
9V power supply ore 18-48V phantom power 
Ground lift 
Instrument & speaker inputs 
 
Overview 
 
 
 
 
 
 
 
Unbalanced input 1/4" TRS sockets. 
Unbalanced stereo RCA pin jacks. 
Switch between speaker or unbalanced instrument input. 
Balanced XLR output connector (R). 
Balanced XLR output connector (L). 
Switch between battery or phantom power. 
(9V battery –LED blinks, +48V phantom power –LED is lit continuously) 
CAUTION! 
Keep this device away from rain and moisture!