Connect a Keyboard to a Mic Input, Connect a Guitar or Bass to a Mic Input, Converts Unbalanced to Balanced, Converts High Impedance to Low Impedance, ¼" Balanced Input, XLR Balanced Output, Parallel Output For Connecting to Amp, -20 or -40 dB Pad, Ground-Lift Button Minimizes Hum ...Connect a Keyboard to a Mic Input, Connect a Guitar or Bass to a Mic Input, Converts Unbalanced to Balanced, Converts High Impedance to Low Impedance, ¼" Balanced Input, XLR Balanced Output, Parallel Output For Connecting to Amp, -20 or -40 dB Pad, Ground-Lift Button Minimizes Hum. The Kopul PDI-40 High-Performance Passive Direct Box lets you connect an unbalanced high-impedance signal to a balanced low-impedance input. It is most often used for plugging a keyboard electric guitar or electric bass guitar directly into a mixing console's microphone-level input.
The PDI-40 can also be used in DJ applications for converting unbalanced +10 dB DJ mixer signals to balanced line-level signals. This allows you to connect your DJ mixer to a mixing console and cuts down on noise that can be picked up in longer cable runs. For live performance and recording applications the PDI-40 features a parallel output for connecting your instrument to an amplifier while simultaneously sending signal to the mixer.
There is also an attenuation switch to lower the signal input by -20 or -40 dB and a ground-lift button to minimize hum and noise caused by ground loops.