Alright, sorry if this has been discussed to hell and back, but I need to know if this will work without blowing something up. Say I want to use my current bass head (200 watts @ 8 ohms) as a preamp for a power amp. Would I use the line out jack on the front of the head which has a 1/4 inch jack, or the DI jack on the back of the head with an XLR jack. Furthermore, I've never been able to figure out what the Lift and Ground switch does in the DI section. Thanks for your help.