The A-Designs KGB-Itf (mono) and KGB-II (stereo) are high input impedance, discrete audio pre-amps designed for instruments like guitars, basses and keyboards.
To accommodate any instrument, the front panel features High/Low Gain toggle switches and Switchcraft 1/4-inch Input and Thru Jacks. On the rear panels are balanced XLR output connectors and toggle switches for phase flip (each channel), ground lift of XLR Pin 1 and power on/off.
The use of CineMag output transformers allows for the use of long transmission line feeds through balanced output cables as for live sound applications. In addition, both KGBs are optimized for guitar and bass guitar pickup impedances, as well as the unbalanced outputs from electronic keyboards such as vintage synthesizers.
Both units feature the same sound and features, the only difference being that the KGB-Itf (mono) has a three band tone control.