Question Is the DI output ground lifted, or do I need a ground lift adapter Answer There is a ground sensing in the BH amps, so there shouldn't be any issues with ground. However, if there is a hum problem there are a couple of ways to get rid of it. 
  • Connect a line driver to the Balanced output. 
  • Use a balanced to unbalanced cable. (Connect pin3 to pin1 on the unbalanced connector side). Wiring directions can be found here