Before I purchased the Minimee tube amp I would frequently record a guitar amped (solidstate) and direct by employing a Roland A/B/Y switch routed as follows Guitar to Roland switch A to amp B direct to one of my Presonus FP instrument channels. This never gave me any problems. When I tried this same routing with the tube amp I encountered an unacceptable level of hum in the amp. I assumed it was ground loop and sent the B cable to an ART8 Isolating transformer 1/4" input http://www.artproaudio.com/products.asp?type=88&cat=11&id=108 and took the 1/4" output to the Presonus. This reduced the amount of hum but it is hardly quiet. So I guess my question is can I send the guitar direct into the isolating transformer 1/4" input and take the xlr input (in order to stay on the same side of the transformer) with the correct cable and go into the input of the amp or will this alter the impedance in a way that will affect tone or amp response? I would then send the output side to the Presonus. If I send the output side to the recording will the resulting recording allow me to reamp later? Which is the purpose of this to begin with. Or is the simplest solution to purchase a DI box that has a thru-put and send the xlr to the Presonus? If so any recommendations for a multipurpose DI, I already own a Radial Reamp box so I don't need necessarily a passive DI to use in reverse. Basically I would rather work something out with ART or some other cabling set up if I can but if not spend some $.