The DB1000 Active Direct Box transforms any high-impedance source into a low-impedance (XLR) signal ready to be sent long distances to a mixing board or recording console. Its active design features isolated inputs, a 15dB pad switch, ground lift switch, low cut switch, and polarity switch. Great for acoustic guitars, bass guitars, keyboards, and more.Input Resistance: 220K OhmsDimensions (in): 6 x 3 1/2 x 1 1/2Frequency Response: 10Hz - 40kHz