A Designs KGB 1tf No Need for DI/Direct Boxes or Mic Preamps, the A Designs KGB 1tf and KGB-II are instrument pre-amplifiers that gives a +4dB transformer balanced line-level output. Plug in your guitar, bass or keyboard into the KGBs (Keyboard/Guitar/Bass) and they will directly drive line level inputs of DAW interfaces, effects processors, power [...]