The DB25b is a transformer balanced, passive direct box.
It features a Ground Lift switch for hum elimination, & an Attenuator control for padding the input signal from -20dB to -in finity dB.
Padding the input signal provides a way to connect the DB25b to a line level signal, even a speaker level signal & connecting it to a balanced line or Mic input on a mixer.
The two 1/4-inch; inputs are paralleled pass-throughs to also send the input signal to a tuner, pre amp, etc..
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