A very well made and well designed piece of gear. While intended to eliminate the need for close mikes, I use the JDX48 to generate a line level signal from a favorite combo amp without a DI or FX loop. Inserted between the amp and the speaker, it gives me the full sound of the amps power section in a line level signal that feeds my stereo effects. I then send the stereo outputs to a power amp and speaker cabs. The effect is startling with the dry combo amp and the stereo effects amplified separately. The ground lift and phase switches are all pluses that make the JDX even more useful. I'm sure it functions very well as a DI for live sound too. Great box.