Apex ADA1 Active Direct Box
Direct boxes are the sound-tech''s "Swiss army knife". Here are some examples of situations where a Direct Box becomes an invaluable tool.
Problem - you need to connect an amplifier''s speaker output to the mic input on a mixer.
Solution - connect an ADA1 between the speaker output and a mic input with phantom power on the mixer, then set the attenuation switch to " -40".
Problem - your PA is humming because there is a ground loop between a signal source and the mixer.
Solution - connect an ADA1 between the signal source and a mic input with phantom power and set the ground switch to "Lift".
Problem - you need to connect an unbalanced line-level source (eg. a synthesizer, another mixer, an effects device, or whatever) to a mic input on the mixer.
Solution - connect an ADA1 between the source and a mic input with phantom power and set the Attenuator switch to "-20".
Active circuitry runs on 9 to 48 Volts of phantom power
Attenuator switch provides two levels of signal padding, -20 and -40dB
Ground lift capability is switch-based for convenience
Dual ¼" unbalanced inputs are in parallel so that one can be used as a "through" jack
XLR balanced output
Active LED indicates the presence of phantom power
Input Level = -10 to +40dB
Output Level = -10 to +2dB
Frequency Range = 1Hz - 50kHz
Signal-to-Noise = 100dB
Power Requirement = 9 to 48VDC of phantom power
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