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Congratulations for purchasing the ADI-2 2-Channel Active Direct Inject Box. This unique
unit is the ultimate, multi-functional active DI box. The ADI-2 is indispensable for solving
many audio mismatch and hum problems in numerous stage and studio applications.
• Simultaneous dual inputs and outputs for stereo or multi-source use
• Eliminates impedance mismatch problems and converts any sound source at
almost any level (from guitar to speaker) into a clean, powerful hum-free, noise-
free and interference-free balanced signal perfect for even extremely long cable
runs
• Full-featured controls and connections include On/Off, Ground Lift, and Guitar/
Speaker Source Select input attenuation switches; unbalanced 1/4" TS Input and
Parallel Link Output jacks; and servo-balanced XLR Output jack.
• Parallel link output allows ultimate hookup flexibility by enabling applications such
as connection to the input of the backline or monitor amplifier.
• No compromise circuit design and stringent component selection provide
absolutely flat, full frequency response across the entire audio spectrum, and
negligible distortion for the most natural, powerful audio available.
• Portable aircraft aluminum extruded case for ultimate roadworthiness, long life and
reliability
• Powered either by console’s +48V phantom power or internal 9V battery
Introduction
Introduction ......................................................................................................................... 2
Controls and Connections .................................................................................................. 3
Operations .......................................................................................................................... 4
Connected to Instrument ............................................................................................. 5
Connected to Amplifier ................................................................................................ 5
Specifications ..................................................................................................................... 5
Frequency Response ......................................................................................... 10Hz-30KHz, +/-3dB
Input Impedance (Guitar) .................................................................................................. 780k ohms
Input Impedance (Speaker) ................................................................................................. 10k ohms
Output Impedance .......................................................................................................... +/-470 ohms
Maximum Output .......................................................................................................... +2dBv/980mV
THD .............................................................................................................................................0.02%
S/N............................................................................................................................................. -108dB
N/Floor ............................................................................................................................................4uV
Noise Level ............................................................................................................................. -101dBu
Inputs .................................................................................................. 2 Unbalanced 1/4" Phone Jack
Outputs ..................................................................................................... 2 Balanced XLR Connector
Outputs ............................................................................................... 2 Unbalanced 1/4" Phone Jack
Power Requirement .......................................................9 Volt Battery or Phantom Power 24-48 VDC
Current drain .............................................................................................................................. 10mA
Weight ........................................................................................................................0.98 lbs. (.36 kg)
Dimension....................................................................................... 5" x 3.7" x 2.2" (127 x 94 x 51mm)
Contents
2
Specifications
Connected to Instrument
The ADI-2 can be used to connect the unbalanced output of an instrument or line level
device (eg. guitar, bass, synthesizer, effects module, another mixer) to the balanced
input of a mixer or amplifier. Set the GUITAR/SPEAKER (3) switch to GUITAR for this
application. If you desire to send the original unbalanced signal on to a mixer or
amplifier, use the 1/4" unbalanced output (5). The 1/4" output (5) is paralleled with
the input, therefore, when using the 1/4" output (5), the input device and output device
volume controls may need to be adjusted to acquire the desired level.
Connected to Amplifier
The ADI-2 can be used to connect an amplifier’s speaker output, or a speaker’s “daisy
chain” output, to the balanced input of a mixer. Set the GUITAR/SPEAKER (3) switch to
SPEAKER for this application. If your speaker has only one connector, the ADI-2 can
be inserted between the amplifier and speaker using the 1/4" input (4) and 1/4" LINK
OUTPUT (5) jacks.
Operation
ADI2_manual 2/9/05, 10:55 AM2